Brian Crooker

Brink, A. A., W. J. Weber, J. D. Lippolis, J. B. Cole, A. K. Rendahl, l. Caixeta, S. M. Godden, A. J. Seykora, and B. A. Crooker. 2023. Effect of Holstein genotype on ex-vivo cytokine response to lipopolysaccharide (LPS), lipoteichoic acid (LTA) and heat-killed Gram-negative and Gram-positive bacteria. Vet. Immunol. Immunopathol. 258:110573. https://doi.org/10.1016/j.vetimm.2023.110573

Eman, M. H., E. Shepley, M.M. Mahmoud, M. Ruch, S. Elmaghawry, W. Abdelrazik, A. M. Abdelaal, B. A. Crooker and L. S. Caixeta. 2023. The association between prepartum rumination time, activity and dry matter intake and subclinical hypocalcemia and hypomagnesemia in the first 3 days postpartum in Holstein dairy cows. Animals. 13:1621. https://doi.org/10.3390/ani13101621

Godden, S. M., E. Royster, B. A. Crooker, J. Timmerman and F. Peña Mosca. 2023. Methods of processing recycled manure solids bedding on Midwest dairy farms I: Associations with bedding bacteria counts, milk quality, udder health and milk production. The Bovine Practitioner. 57:10-20. https://doi.org/10.21423/bovine-vol57no1p10-20

Cramer, G., E. Shepley, W. Knauer, B. A. Crooker, S. Wagner and L. Caixeta. 2023. An iterative approach to the development of a sole ulcer induction model in Holstein cows. J. Dairy Sci. JDS.2022-22726R2.  (01-09-2023).

Sarlo Davila, K., P. Boggiatto, S. Olsen, J. Lippolis, B. A. Crooker, E. Putz. 2024. Effect of selection genotype on immune response to Brucella abortus RB51 in Holstein cattle. Animal Genetics. 55:47-54. https://doi.org/10.1111/age.13372

Peña Mosca, F., S. M. Godden, E. Royster, B. A. Crooker, J. Timmerman. 2024. Methods of processing recycled manure solids bedding on Midwest dairy farms II: Relationships between bedding characteristics and bedding bacterial count. The Bovine Practitioner. 58:8-18. https://doi.org/10.21423/bovine-vol58no1p8-18

Guo, Y., W. J. Weber, D. Yao, L. Caixeta, N. P. Zimmerman, J. Thompson, E. Block, T. G. Rehberger, B. A. Crooker, C. Chen. 2022. Forming 4-methylcatechol as the dominant bioavailable metabolite of intraruminal rutin inhibits p-cresol production in dairy cows. Metabolites 12:16. (Published online: 24 December 2021). https://doi.org/10.3390/metabo12010016

Knauer, W. A., S. M. Godden, A. K. Rendahl, M. I. Endres, and B. A. Crooker. 2021. The effect of individual versus pair housing of dairy heifer calves during the preweaning period on measures of health, performance, and behavior up to 16 weeks of age. J. Dairy Sci. 104:3495-3507. https://doi.org/10.3168/jds.2020-18928

Patel, K., S. M. Godden, E. E. Royster, B. A. Crooker, T. J. Johnson, E. A. Smith and S. Sreevatsan. 2021. Prevalence, antibiotic resistance, virulence and genetic diversity of Staphylococcus aureus isolated from bulk tank milk samples of U.S. dairy herds. BMC Genomics. 22:367. https://doi.org/10.1186/s12864-021-07603-4

Cousillas Boam, G., W. J. Weber, A. Benjamin, S. Kahl, B. J. Heins, T. H. Elsasser, D. E. Kerr and B. A. Crooker. 2020. Effect of Holstein genotype on innate immune and metabolic responses of heifers to lipopolysaccharide (LPS) administration. Domest. Anim. Endocrinol. 70:106374

Ponce de León, F. A., Y. Guo, B. A. Crooker. 2020. Single molecule sequencing of nucleic acids in real time (SMRT) to characterize transcriptomes and mRNA isoforms. Rev. Peruvian Biol.27:91-94.

Caixeta L.S., W. J. Weber, D. M. Johnson, J. Faser, B. M. Visser and B. A. Crooker. 2020. Effects of anionic supplement source in prepartum negative dietary cation-anion difference diets on serum calcium, feed intake, and lactational performance of multiparous dairy cows. J. Dairy Sci. 103:4302-4314.

Kumar, P., P. Panigrahi, J. Johnson, W. J. Weber, S. Mehta, R. Sajulga, C. Easterly, B. A. Crooker, M. Heydarian, K. Anamika, T. J. Griffin and P. D. Jagtap. 2019. QuanTP: A software resource for quantitative proteo-transcriptomic comparative data analysis and informatics.  J. Proteome Res. 18:782-790. doi:  10.1021/acs.jproteome.8b00727

Ma, L., T. Sonstegard, J. Cole, C. Van Tassell, G. Wiggans, B. A. Crooker, C. Tan, D. Prakapenka, G. Liu and Y. Da. 2019. Genome changes due to artificial selection in U.S. Holstein cattle. BMC Genomics 20:128. doi: 10.1186/s12864-019-5459-x.

Patel, K., S. M.Godden, E. Royster, B. A. Crooker, J. Timmerman and L. Fox. 2019. Relationships among bedding materials, bedding bacteria counts, udder hygiene, milk quality, and udder health in US dairy herds. J Dairy Sci. 2019 Nov;102(11):10213-10234. doi: 10.3168/jds.2019-16692. Epub 2019 Aug 22. PMID: 31447166

Cousillas-Boam, G., W. J. Weber, A. Benjamin, S. Kahl, B. J. Heins, T. H. Elsasser, D. E. Kerr and B. A. Crooker. 2019. Effect of Holstein genotype on innate immune and metabolic responses of heifers to lipopolysaccharide (LPS) administration. Domest Anim Endocrinol. 2019 Jul 12;70:106374. doi: 10.1016/j.domaniend.2019.07.002. [Epub ahead of print]  PMID: 31499245

Cousillas-Boam, G., W. J. Weber, A. Benjamin, S. Kahl, G. A. Bridges, T. H. Elsasser, D. Kerr and B. A. Crooker. 2019. Effect of bovine genotype on innate immune and metabolic responses of heifers to repeated lipopolysaccharide (LPS) administration. Veterinary Immunology and Immunopathology. 215:109914.

Rowe, S. M., S. M. Godden, E. Royster, J. Timmerman, B. A. Crooker, and M. Boyle. 2019. Cross-sectional study of the relationships among bedding materials, bedding bacteria counts, and intramammary infection in late-lactation dairy cows. J. Dairy Sci. 102. J Dairy Sci. 2019 Oct 9. pii: S0022-0302(19)30900-2. doi: 10.3168/jds.2019-17074. [Epub ahead of print] PMID: 31606215

Lyte, M., D. N. Villageliú, B. A. Crooker, and D. R. Brown. 2018. Symposium Review: Microbial endocrinology - Why the integration of microbes, epithelial cells and neurochemical signals in the digestive tract matters to ruminant health. J. Dairy Sci. 101:5619-5628.

Kumar, P., P. Panigrahi, J. Johnson, W. J. Weber, S. Mehta, R. Sajulga, C. Easterly, B. A. Crooker, M. Heydarian, K. Anamika, T. J. Griffin and P. D. Jagtap. 2018. QuanTP: A software resource for quantitative proteo-transcriptomic comparative data analysis and informatics. J. Proteome Res. DOI: 10.1021/acs.jproteome.8b00727 • Publication Date (Web): 24 Dec 2018.

Patel, K., S. Godden, E. Royster, J. Timmerman, B.A. Crooker, and N. McDonald. 2017. Pilot study: Impact of using a culture-guided selective dry cow therapy program targeting quarter-level treatment on udder health and antibiotic use. The Bovine Pract. 51:48-57.

Silva, P.R.B., W.J. Weber, B.A. Crooker, R.J. Collier, W.W. Thatcher, and R.C. Chebel. 2017. Hepatic mRNA expression for genes related to somatotropic axis, glucose and lipid metabolisms, and inflammatory response of periparturient cows treated with recombinant bovine somatotropin. J. Dairy Sci. 100:3983-3999.

Benjamin, A., B. Green, B. Crooker, S. McKay, and D. Kerr. 2016. Differential responsiveness of Holstein and Angus dermal fibroblasts to LPS challenge occurs without major differences in the methylome. BMC Genomics. 17: 258.

Sorge, U.S., M. Hendrickson, A. Bastan, and B.A. Crooker. 2016. Iodine concentrations in milk, serum and tears after feeding Ascaphyllum nodosum to dairy cows - A pilot study. J. Dairy Sci. 99:8472-8476.

Astessiano, A.L., R. Perez-Clariget, G. Quintans, P. Soca, A. Meikle, B.A. Crooker, and M. Carriquiry. 2014. Metabolic and endocrine profiles and hepatic gene expression in periparturient, grazing primiparous beef cows with different body reserves. Livestock Sci. 170:63-71.

Eui-Soo K., J.B. Cole, H. Huson, G.R. Wiggans, C.P. Van Tassell, B.A. Crooker, G. Liu, Y. Da, and T. Sonstegard. 2013. Effect of artificial selection on runs of homozygosity in U.S. Holstein cattle. PLoS ONE. 8(11): e80813. doi:10.1371/journal.pone.0080813.

Ma, L., G.R. Wiggans, S. Wang, T.S. Sonstegard, J. Yang, B.A. Crooker, J.B. Cole, C.P. Van Tassell, T.J. Lawlor, and Y. Da . 2012. Effect of sample stratification on dairy GWAS results. BMC Genomics 13:536.

Cole, J.B., G.R. Wiggans, L. Ma, T.S. Sonstegard, T.J. Lawlor, Jr., B.A. Crooker, C.P. Van Tassell, J. Yang, S. Wang, L.K. Matukumalli, and Y. Da. 2011. Genome-wide association analysis of thirty one production, health, reproduction and body conformation traits in contemporary U.S.Holstein cows. BMC Genomics. 12:408.

Rhoads, M.L., J.W. Kim, R.J. Collier, B.A. Crooker, Y.R. Boisclair, L.H. Baumgard, and R.P. Rhoads. 2010. Effects of heat stress and nutrition on lactating Holstein cows: II. Aspects of hepatic growth hormone responsiveness. J. Dairy Sci. 93:170-179.

Carriquiry, M., C.R. Dahlen, W.J. Weber, G.C. Lamb, and B.A. Crooker. 2009. Postpartum ovarian activity in multiparous Holstein cows treated with bovine somatotropin and fed n-3 fatty acids in early lactation. J. Dairy Sci. 92:4876-4888.

Carriquiry, M., W.J. Weber, C.R. Dahlen, G.C. Lamb, L.H. Baumgard, and B.A. Crooker. 2009. Fatty acid composition of milk from multiparous Holstein cows treated with bovine somatotropin and fed n-3 fatty acids in early lactation. J. Dairy Sci. 92:4865-4875.

Carriquiry, M., W.J. Weber, C.R. Dahlen, G.C. Lamb, L.H. Baumgard, J.L. Vicini, and B.A. Crooker. 2009. Production response of multiparous Holstein cows treated with bovine somatotropin and fed n-3 fatty acids in early lactation. J. Dairy Sci. 92:4852-4864.

Carriquiry, M., W.J. Weber, S.C. Fahrenkrug, and B.A. Crooker. 2009. Hepatic gene expression in multiparous Holstein cows treated with bovine somatotropin and fed n-3 fatty acids in early lactation. J. Dairy Sci. 92:4889-4900.

Rhoads, M.L., R.P. Rhoads, M.J. VanBaale, R.J. Collier, S.R. Sanders, W.J. Weber, B.A. Crooker, and L.H. Baumgard. 2009. Effects of heat stress and plane of nutrition on lactating Holstein cows: I. Production, metabolism, and aspects of circulating somatotropin. J. Dairy Sci. 92:1986-1997.

Annen, E.L., C.M. Stiening, B.A. Crooker, A.C. Fitzgerald, and R.J. Collier. 2008. Effect of continuous milking and prostaglandin E2 on milk production and mammary epithelial cell turnover, ultrastructure, and gene expression. J. Anim. Sci. 86:1132-1144.

Carriquiry, M., W.J. Weber, L.H. Baumgard, and B.A. Crooker. 2008. In vitro biohydrogenation of four sources of protected dietary fats. Anim. Feed Sci. Technol. 141:339-355.

Carriquiry, M., W.J. Weber, and B.A. Crooker. 2008. Administration of bST in early lactation: A meta-analysis of production responses by multiparous Holstein cows. J. Dairy Sci. 91:2641–2652.

Weber, W.J., C.R. Wallace, L.B. Hansen, H. Chester-Jones, and B.A. Crooker. 2007. Effects of selection for milk yield on somatotropin, insulin-like growth factor-I and placental lactogen in Holstein cows. J. Dairy Sci. 90:3314-3325.

Radcliff, R.P., B.L. McCormack, D.H. Keisler, B.A. Crooker, and M.C. Lucy. 2006. Partial feed restriction decreases growth hormone receptor 1A mRNA expression in postpartum dairy cows. J Dairy Sci. 89(2):611-619.

Jiang, H., M.C. Lucy, B.A. Crooker, and W.E. Beal. 2005. Expression of growth hormone receptor 1A mRNA is decreased in dairy cows but not in beef cows at parturition. J. Dairy Sci. 88:1370-1377.

Kay, J.K., W.J. Weber, C.E. Moore, D. Bauman, L. Hansen, H. Chester-Jones, B.A. Crooker, and L.H. Baumgard. 2005. Effects of week of lactation and genetic selection for milk yield on milk fatty acid composition in Holstein dairy cows. J. Dairy Sci. 88:3886-3893.

Weber, W.J., L.H. Baumgard, G.W. Kazmer, S.A. Zinn, L.B. Hansen, H. Chester-Jones, and B.A. Crooker. 2005. Effects of selection for milk yield on growth hormone response to dose of growth hormone releasing factor in Holstein calves. J. Dairy Sci. 88:1723-1731.

Radcliff, R.P., B.L. McCormack, B.A. Crooker, and M.C. Lucy. 2003. Growth hormone (GH) binding and expression of GH receptor 1A mRNA in hepatic tissue of periparturient dairy cows. J. Dairy Sci. 2003 86: 3933-3940.

Radcliff, R.P., B.L. McCormack, B.A. Crooker, and M.C. Lucy. 2003. Plasma hormones and expression of growth hormone receptor and insulin-like growth factor-I mRNA in hepatic tissue of periparturient dairy cows. J. Dairy Sci. 2003 86: 3920-3926.

Block, S.S., R.P. Rhoads, D.E. Bauman, R.A. Ehrardt, M.A. McGuire, B.A. Crooker, J.M. Griinari, T.R. Mackle, W.J. Weber, M.E. Van Amburgh, and Y.R. Boisclair. 2003. Demonstration of a role for insulin in the regulation of leptin in lactating dairy cows. J. Dairy Sci. 86:3508-3518.

Baumgard, L.H., W.J. Weber, G.W. Kazmer, S.A. Zinn, L.B. Hansen, H. Chester-Jones, and B.A. Crooker. 2002. Effects of selection for milk yield on growth hormone response to growth hormone releasing factor in growing Holstein calves. J. Dairy Sci. 85:2529-2540.

Rausch, M.I., M.W. Tripp, K.E. Govoni, W. Zang, W. Weber, B.A. Crooker, T.A. Hoagland, and S.A. Zinn. 2002. The influence of level of feeding and on growth and serum insulin-like growth factor I and insulin-like growth factor-binding proteins in growing beef cattle supplemented with somatotropin. J. Anim. Sci. 80:94-100.

Bilby, C.R., J.F. Bader, B.E. Salfen, R.S. Youngquist, C.N. Murphy, H.A. Garverick, B.A. Crooker, and M.C. Lucy. 1999. Plasma GH, insulin-like growth factor-I and conception rate in cattle treated with low doses of recombinant bovine GH. Theriogenology 51:1285-1296.

Kusina, J., J.E. Pettigrew, A.F. Sower, M.R. Hathaway, M.E. White, and B.A. Crooker. 1999. Effect of protein intake during gestation on mammary development of primiparous sows. J. Anim. Sci. 77:925-930.

Kusina, J., J.E. Pettigrew, A.F. Sower, M.E. White, B.A. Crooker, and M.R. Hathaway. 1999. Effect of protein intake during gestation and lactation on the lactational performance of primiparous sows. J. Anim. Sci. 77:931-941.

Akayezu, J.M., W.P. Hansen, D.E. Otterby, B.A. Crooker, and G.D. Marx. 1997. Production response of lactating Holstein cows to dietary fish meal or meat and bone meal. J. Dairy Sci. 80:2950-2963.

Boisclair, Y.R., K.B. Johnston, D.E. Bauman, B.A. Crooker, F.R. Dunshea, and A.W. Bell. 1997. Paradoxical increases of circulating nonesterified fatty acids in somatotropin treated heifers and steers undergoing mild disturbances. Domestic Animal Endo. 14:251-262.

Lee, B.K., G.F. Lin, B.A. Crooker, M.P. Murtaugh, L.B. Hansen, and H. Chester-Jones. 1996. Association of a somatotropin (bST) gene polymorphism at the 5th exon with selection for milk yield in Holstein cows. Domestic Animal Endo. 13:373-381.

Yoon, I., K.J. Lindquist, D.D. Hongerholt, M.D. Stern, B.A. Crooker, and K.D. Short. 1996. Variation in Menhaden fish meal characteristics and their effects on ruminal protein degradation as assessed by several techniques. Anim. Feed Sci. Techn. 60:13-27.

Calsamiglia, S., G. Caja, M.D. Stern, and B.A. Crooker. 1995. Effects of ruminal versus duodenal dosing of fish meal on ruminal fermentation and yield and composition of milk from Holstein cows. J. Dairy Sci. 78:1999-2007.

Crooker, B.A., R.L. Preston, and R.D. Boyd. 1995. Data integrity - conduct of clinical investigators: University investigator perspective. J. Anim. Sci. 73:622-628.

Illg, D. J., M.D. Stern, H.R. Mansfield, and B.A. Crooker. 1994. Effects of extruded soybeans and forage source on fermentation by rumen microorganisms in continuous culture. J. Dairy Sci. 77:159-1597.

Pettigrew, J.E., J.P. McNamara, M.D. Tokach, R.H. King, and B.A. Crooker. 1993. Metabolic connections between nutrient intake and lactational performance in the sow. Livestock Prod. Sci. 35:137-152.

Calsamiglia, S., D.D. Hongerholt, B.A. Crooker, M.D. Stern, G.F. Hartnell, and R.L. Hintz. 1992. Effect of fish meal and expeller-processed soybean meal fed to dairy cows receiving bovine somatotropin (Sometribove). J. Dairy Sci. 75:2454-2462.

Calsamiglia, S., M.D. Stern, and B.A. Crooker. 1992. Effect of diets differing in crude protein degradability on microbial fermentation and nutrient flow from a continuous culture system. Anim. Feed Sci. Tech. 39:239-252.

Hongerholt, D.D., B.A. Crooker, J.E. Wheaton, K.M. Carlson, and D.M. Jorgenson. 1992. Effects of a growth hormone releasing factor analogue and an estradiol-trenbolone acetate implant on somatotropin, insulin-like growth factor I, and metabolite profiles in growing Hereford steers. J. Anim. Sci. 70:1439-1448.

Tokach, M.D., J.E. Pettigrew, B.A. Crooker, G.D. Dial, and A.E. Sower. 1992. Quantitative influence of lysine and energy intake on the yield of milk components in the primiparous sow. J. Anim. Sci. 70:1864-1872.

Tokach, M.D., J.E. Pettigrew, G.H. Dial, J.E. Wheaton, B.A. Crooker, and L.J. Johnston. 1992. Characterization of luteinizing hormone secretion in the primiparous lactating sow: relation to blood metabolites and return-to-estrus interval. J. Anim. Sci. 70:2195-2201.

Tokach, M.D., J.E. Pettigrew, G.D. Dial, J.E. Wheaton, B.A. Crooker, and Y. Koketsu. 1992. Influence of glucose infusions on luteinizing hormone secretion in the energy-restricted primiparous lactating sow. J. Anim. Sci. 70:2202-2206.

Crooker, B.A., P.T. Anderson, and R.D. Goodrich. 1991. Maintenance energy requirements and energetics of tissue deposition and mobilization in cattle. Grazing Livestock Nutrition Conference Proceedings. 2:1-12.

House, W.A., B.A. Crooker, and D.E. Bauman. 1991. Utilization of sulfur and mineral elements by growing dairy heifers treated with bovine somatotropin. J. Anim. Sci. 69:3817-3825.

Polan, C.E., K.A. Cummins, C.J. Sniffen, T.V. Muscato, J.L. Vicini, B.A. Crooker, J.H. Clark, D. Johnson, D.E. Otterby, L.D. Muller, R.A. Murray, and S.B. Peirce Sandner. 1991. Responses of dairy cows to supplemental rumen protected forms of methionine and lysine. J. Dairy Sci. 74:2997-3013.

Crooker, B.A., M.A. McGuire, W.S. Cohick, M. Harkins, D.E. Bauman, and K. Sejrsen. 1990. Effect of dose of bovine somatotropin on nutrient utilization in growing dairy heifers. J. Nutr. 120:1256-1263.

Godfredson, J.A., J.E. Wheaton, B.A. Crooker, E.A. Wong, R.M. Campbell, and T.F. Mowles. l990. Growth performance and carcass composition of lambs infused for 28 days with a growth hormone releasing factor analogue. J. Anim. Sci. 68:3624-3632.

Bauman, D.E., D.L. Hard, B.A. Crooker, M.S. Partridge, K. Garrick, L.D. Sandles, H.N. Erb, S.E. Franson, G.F. Hartnell, and R.L. Hintz. 1989. Long term evaluation of a prolonged release formulation of N methionyl bovine somatotropin in lactating dairy cows. J. Dairy Sci. 72:642-651.

Crooker, B.A. and J.H. Clark. 1987. Inhibition of L alanine uptake into bovine jejunal brush border membrane vesicles by L amino acids. J. Dairy Sci. 70:963-969.

Crooker, B.A., J.H. Clark, R.D. Shanks, and G.C. Fahey. 1987. Effects of ruminal exposure on the amino acid profile of feeds. Cand. J. Anim. Sci. 67:1143-1148.

Clark, J.H., M.R. Murphy, and B.A. Crooker. 1987. Supplying the protein needs of dairy cattle from byproduct feeds. J. Dairy Sci. 70:1092-1109.

Crooker, B.A. and J.H. Clark. 1986. Preparation of brush border membrane vesicles from fresh and frozen bovine intestine for nutrient uptake studies. J. Dairy Sci. 69:58-70.

Crooker, B.A., J.H. Clark, R.D. Shanks, and E.E. Hatfield. 1986. Effects of ruminal exposure on the amino acid profile of heated and formaldehyde treated soybean meal. J. Dairy Sci. 69:2648-2657.

Crooker, B.A., J.H. Clark, and R.D. Shanks. 1983. Effects of formaldehyde treated soybean meal on milk yield, milk composition and nutrient digestibility in the dairy cow. J. Dairy Sci. 66:492-504.

Vicini, J.L., J.H. Clark, and B.A. Crooker. 1983. Comparison of the effectiveness of acetic acid and formaldehyde for preventing protein degradation in the rumen. J. Dairy Sci. 66:350-354.Crooker, B.A., J.H. Clark, and R.D. Shanks. 1982. Rare earth elements as markers for rate of passage measurements of individual dietary feedstuffs. J. Nutr. 112:1353-1361.

Godden, S., K. Patel, E. Royster, J. Timmerman, B. A. Crooker and L. Fox. 2018. Relationships between bedding bacteria counts, bedding characteristics and udder health. National Mastitis Council Regional Meeting. Guelph, Ontario. June 21.

Crooker, B.A., W.J. Weber, L.S. Ma, and M.C. Lucy. 2001. Effect of energy balance and selection for milk yield on the somatotropic axis of the lactating Holstein cow: Endocrine profiles and hepatic gene expression. In: Energy Metabolism of Animals (15th Symposium). EAAP Energy Symposium, Snekkersten, Denmark. EAAP Publ. No. 103. pp. 345-348.

Lucy, M.C., and B.A. Crooker. 2001. Physiological and genetic differences between low and high index dairy cows. In: Fertility in the High Producing Dairy Cow. British Society of Animal Science Occas. Publ. No. 26. Vol 1. Galway, Ireland. pp. 223-236.

Crooker, B.A., W.J. Weber, and S.M. Andrew. 1998. Development and use of deuterium oxide dilution equations to predict body composition of Holstein cows. In: Energy Metabolism of Farm Animals (14th Symposium). Newcastle, Northern Ireland. CAB International. pp. 177-180.

Crooker, B.A., M.T. Maslanka, W.J. Weber, D.G. Johnson and D.E. Otterby. 1994. Effect of bovine somatotropin administration during lactation on body composition of Holstein cows at dry-off and prior to calving. In: Energy Metabolism of Farm Animals (13th Symposium). EAAP Energy Symposium, Mojacar, Spain. EAAP Publ. No. 76. Consejo Superior de Investigaciones Cientificas. pp. 51-54.

Pettigrew, J.E., M.D. Tokach, B.A. Crooker, and A.F. Sower. 1991. Energy-protein interactions in the lactating sow: metabolites and milk synthesis. In: Energy Metabolism of Farm Animals (12th Symposium). EAAP Energy Symposium, Zurich, Switzerland. EAAP Publ. No. 58. pp. 349-352.

Crooker, B.A. and D.E. Otterby. 1991. Management of the dairy herd treated with bovine somatotropin. In: The Veterinary Clinics of North America: Food Animal Practice. C.J. Sniffen and T.H. Herdt (Ed.), W.B. Saunders Co., Philadelphia, PA. 7:417-437.

Crooker, B.A. and D.E. Bauman. 1987. Nutrient partitioning: Physiological basis for animal differences. In: Dairy Science Handbook Vol. 17 pp. 181-186. L.S. Pope (Ed.), Spillman Press, Sacramento, CA.

Crooker, B.A. and D.E. Bauman. 1987. Role of somatotropin in nutrient partitioning: Enhancement of growth. In: Dairy Science Handbook Vol. 17 pp. 231-237. L.S. Pope (Ed.), Spillman Press, Sacramento, CA.

Crooker, B.A. and D.E. Bauman. 1987. Role of somatotropin in nutrient partitioning: Enhancement of lactation. In: Dairy Science Handbook Vol. 17 pp 224-230. L.S. Pope (Ed.), Spillman Press, Sacramento, CA.

Crooker, B. A. 2019. Impacts of negative dietary cation-anion difference (DCAD) on prepartum dairy cows. Minnesota Nutrition Conference. Mankato. September 18, 2019.

Crooker, B. A. 2019. Impacts of negative dietary cation-anion difference (DCAD) on prepartum dairy cows. Proceedings of the Minnesota Nutrition Conference. Pp 1-7. Mankato. September 18, 2019.

Crooker, B.A. 2016. Regulation and integration of hepatic function with mammary and adipose metabolism in multiparous Holstein cows during the periparturient period. Agriculture and Food Research Initiative Annual Project Director Mtg. p. 27.

Crooker, B.A., W. Weber, and G. Cousillas. 2016. Milk yield genotype affects metabolism, endocrinology and immunology of the Holstein. Proc. California Animal Nutrition Conf., Fresno, CA. May 4-5. p. 75-80.

Benjamin, A.L., W.J. Weber, S.D. McKay, B.A. Crooker, and D.E. Kerr. 2014. Investigating innate immune response differences between Angus and Holstein cattle with the dermal fibroblast model. J. Anim. Sci. Vol. 92, E-Suppl. 2/J. Dairy Sci. Vol. 97, E-Suppl. 1. 34.

Sonstegard, T.S., L. Ma, E.S. Kim, C.P. VanTassell, G.R. Wiggans, B.A. Crooker, J.B. Cole, G. Liu, J.R. Garbe, S.C. Fahrenkrug, F.A. Ponce de León, and Y. Da. Genome changes due to forty years of artificial selection associated with divergent dairy production and reproduction. Plant and Anim. Genome XXIII.

Weber, W.J., M. Carriquiry, S.C. Fahrenkrug, and B.A. Crooker. 2014. Effect of milk yield genotype on gene expression in liver and adipose tissue from periparturient Holsteins. J. Anim. Sci. Vol. 92, E-Suppl. 2/J. Dairy Sci. Vol. 97, E-Suppl. 1. 613.

Crooker, B.A., M. Carriquiry, and W.J. Weber. 2007. Energy balance of the periparturient dairy cow. Four-State Nutrition Conf., Dubuque, IA. June 12-14. pp. 1-12.

Crooker, B.A., M. Carriquiry, and W.J. Weber. 2006. Reproductive success in dairy cows: the linkage of milk yield, nutrition, and reproduction. 8th Intermountain Nutrition Conf. Salt Lake City, UT. Jan. 24-25. pp. 213-224.

Carriquiry, M. and B.A. Crooker. 2005. Reproductive success in dairy cows: the linkage of milk yield, nutrition, and reproduction. 66th Minnesota Nutrition Conference. St. Paul, MN. September 20-21. pp. 255-269.

Crooker, B.A. 2004. Induced lactation. Department of Animal Sciences, University of Arizona, Tucson, AZ. Feb. 9.

Crooker, B.A. 2004. Induced lactation - If approved, would it be economical? University of Illinois, Urbana. June 5.

Crooker, B.A., D.T. Galligan, W.J. Weber, R.J. Collier, M. Chahine, T.H. Klusmeyer, M.F. McGrath, and J.L. Vicini. 2004. Induced lactation - If approved, would it be economical? Proc., 19th Annual Southwest Nutrition and Management Conference, Tempe, Arizona. Feb. 24-25. pp. 152-161.

McGuire, M.A., M. Theurer, J.L. Vicini, and B.A. Crooker. 2004. Controlling energy balance in early lactation. 22nd Annual Western Canadian Dairy Symposium: Advances in Dairy Technology, Red Deer, AB. March 9-12. 16:241-252.

Crooker, B.A., D.T. Galligan, W.J. Weber, R.J. Collier, M. Chahine, T.H. Klusmeyer, M.F. McGrath, and J.L. Vicini. 2004. Induced lactation - If approved, would it be economical? Southwest Nutrition and Management Conference Proceedings. University of Arizona. pp. 152-161.

McGuire, M.A., M. Theurer, J.L. Vicini, and B.A. Crooker. 2004. Controlling energy balance in early lactation. Western Canadian Dairy Symposium. Advances in Dairy Technology. 16:241-252.

Crooker, B.A. 2003. Effect of selection for milk yield on growth and lactational performance: energy balance and endocrine profiles in the Holstein cow. Monsanto Science Symposium. St. Louis, MO. August 2, 2003. (CD distributed to dairy producers and the scientific community.)

Crooker, B.A. 2003. Induced lactation - Technical update. Monsanto Science Program - Development Meeting. St. Louis, MO. April 15, 2003.

Crooker, B.A., M. Chahine, W.J. Weber, J.K. Reneau, J.L. Vicini, M.F. McGrath, E.A. Reed, and T.H. Klusmeyer. 2003. Induction of lactation using steroid hormones and bST in nonpregnant, reproductive cull Holstein cows. In: Proc. MN Dairy Days-2003. pp. 54-55.

Crooker, B.A., M. Chahine, W.J. Weber, J.K. Reneau, J.L. Vicini, M.F. McGrath, E.A. Reed, and T.H. Klusmeyer. 2003. Induced lactation: The need for enhanced mammary development and differentiation. Lactation Biology Symposium - Altering the Lactation Cycle in Dairy Cows. Annual National Meeting of ADSA/ASAS. Phoenix, AZ. June 25, 2003.

Vicini, J.L., B.A. Crooker, and M.A. McGuire. 2002. Energy balance in early lactation dairy cows. In: Proc. California Animal Nutrition Conference. Fresno, CA. pp. 1-8.

Da, Y., T.S. Sonstegard, B.A. Crooker, F.A. Ponce de León, L.B. Hansen, H. Chester-Jones, M.L. Fahning, B.E. Seguin, and G.D. Marx. 2000. Designs of resource populations for dairy QTL mapping. W. E. Peterson Symposium - Dairy Genomics: Trends and Opportunities. University of Minnesota, St. Paul, Dec. 11-12.

Crooker, B.A. 1999. Impact of the use of hormones on milk production. In: Proceedings of the 25th International Dairy Congress. Volume III - Future Milk Farming. pp. 121-128.

Crooker, B.A. and B.K. Lee. 1997. Feeding the BST-treated dairy cow. In: 7th Short-Course on Feed Technology. Korean Society of Animal Nutrition and Feedstuffs. pp. 54-477.

Crooker, B.A. 1996. Feeding the high producing dairy cow: biotechnology, body condition and reproduction. In: Minnesota Dairy Health Conference. pp. 262-266.

Crooker, B.A. and W.J. Weber. 1996. Managing body condition in dairy cattle. In: 57th Minnesota Nutrition Conference. pp. 135-150.

White, M., J. Pettigrew, J. Zollitsch-Stelzl, and B.A. Crooker. 1993. Chromium in swine diets. In: 54th Minnesota Nutrition Conference. pp. 251-262.

May, M.G., and B.A. Crooker. 1992. Body composition of dairy cattle and its relationship to body condition and production. In: 53rd Minnesota Nutrition Conference. pp. 1-17.

Crooker, B.A. 1990. The animal welfare-animal rights movement and animal agriculture: a research and education perspective. In: 51st Minnesota Nutrition Conference. pp. 291-298.

Crooker, B.A. and D.E. Otterby. 1990. Managing the bST treated cow. In: 51st Minnesota Nutrition Conference. pp. 59-83.

Crooker, B.A. 1989. Economic considerations of use of bovine somatotropin. In: Bovine somatotropin (bST) and the dairy industry. Proc. Minnesota Extension Conf. pp. 42-56.

Crooker, B.A. 1989. Human and animal safety in relation to use of bovine somatotropin. In: Bovine somatotropin (bST) and the dairy industry. Proc. Minnesota Extension Conf. pp. 1-15.

Crooker, B.A. 1988. Somatotropin and ß agonist: Effects on growth and development. In: 49th Minnesota Nutrition Conference. pp. 104-116.

Crooker, B.A. 1987. The role of somatotropin in nutrient partitioning: Enhancement of growth and lactation. In: 48th Minnesota Nutrition Conference. pp. 108-117.

Clark, J.H., R.R. Grummer, and B.A. Crooker. 1980. Protein nutrition of lactating dairy cows. In: 41st Minnesota Nutrition Conference. pp. 17-36.

Clark, J.H., and B.A. Crooker. 1979. The effects of protein solubility on ruminal protein degradation. In: Proceedings and Events. Brookside Farms Lab. Assoc. Inc. Ann. Jamboree and Conf. pp. 1-26.Sniffen, C.J., W.H. Hoover, L.L. Junkins, B.A. Crooker, and C.A. MacGregor. 1979. Variation in protein and soluble carbohydrate composition of various feedstuffs. In: Proceedings of the Cornell Nutrition Conference. pp. 119-125.

Crooker, B.A. 1999. Effect of selection for milk yield from a nutritional physiologist's viewpoint. Lactation Biology Symposium - Selection for Milk Yield. ADSA Annual Meeting. Memphis, TN. June 22, 1999.

Crooker, B.A. 1999. Effect of selection for milk yield on nutritional physiology of the cow. Monsanto Dairy Industry. June 3, 1999.

Crooker, B.A. 1999. Impact of the use of hormones on milk production. The Dairy Industry and the "U". Handout for three M.A.E.S. Workshops (Crookston, January 9; Zumbrota, January 23; Melrose, February 6).

Crooker, B.A. 1999. Improved understanding of animal biology can increase productive efficiency, benefit the environment, and produce safe, nutritious food. The Dairy Industry and the "U". Poster for three M.A.E.S. Workshops (Crookston, January 9; Zumbrota, January 23; Melrose, February 6).

Leonard, E., B. A. Crooker, S. Dow, L. Caixeta. 2023. Intramammary liposome-TLR agonist dose titration: effect on differential somatic cell count. Conference of Research Workers in Animal Diseases (CRWAD). Chicago, IL. January 23. Poster P083.

Emam, M., E. Shepley, M. Mahmoud, M. Ruch, S. Elmaghawry, W. Abdelrazik, A. Abdelaal, B. A. Crooker and L. Caixeta. 2023. The association of prepartum rumination time and subclinical hypocalcemia in the first 3 days postpartum. Conference of Research Workers in Animal Diseases (CRWAD). Chicago, IL. January 23. Poster P079.

Sarlo Davila, K., P. Boggiatto, S. Olsen, J. Lippolis, B. A. Crooker, and E. Putz. 2023. Effect of Holstein cattle genotype on Brucella abortus challenge response. Conference of Research Workers in Animal Diseases (CRWAD). Chicago, IL. January 23. Poster P116.

Sarlo Davila, K., P. Boggiatto, S. Olsen, J. D. Lippolis, B. A. Crooker, W. Weber and E. Putz. 2023. Effect of Holstein genotype on PBMC transcriptomic response to Brucella abortus. Plant and Animal Genome Conference -PAG30. San Diego, CA. January 13-18. Poster #48363 (PO0807).

Jacobson, E., W. Weber, E. Shepley, G. Cramer, B. A. Crooker, I. Salfer. 2023. Effect of Holstein genotype on lying and movement activity, feed intake, and milk production. J. Dairy Sci. Vol. 106, Suppl. 1:429 (1707W).

Leonard, E., B. A. Crooker, S. Dow, L. Caixeta. 2023. Intramammary liposome-toll-like receptor agonist (LTC) dose titration: effect on differential somatic cell count. J. Dairy Sci. Vol. 106, Suppl. 1:311 (1319T).

Weber, W. J., C. Chen and B. A. Crooker. 2023. Effect of Holstein genotype on hepatic expression of genes associated with metabolism and immunity. University of Minnesota. Department of Animal Science. Annual Showcase. April 27.

Lippolis, J. D., E. J. Putz, T. A. Reinhardt, E. Casas, W. J. Weber, B. A. Crooker. 2022. Holstein genotype impacts immune response to an intramammary Escherichia coli challenge. Proc. 61st Annu. Conf. National Mastitis Council. February 3. San Diego, CA. virtual.

Lippolis, J. D., E. J. Putz, T. A. Reinhardt, E. Casas, W. J. Weber, B. A. Crooker. 2022. Whole blood transcript profiles in Holstein cows subjected to an intramammary 8 Escherichia coli challenge. Proc. 61st Annu. Conf. National Mastitis Council. February 3. San Diego, CA. virtual.

Caixeta, L. S., S. Dow, N. R. Noyes, B. A. Crooker, S. M. Godden, D. V. Nydam, B. Walcheck, W. Wheat. 2021. Effect of mucosal immune stimulant on mammary gland immune responses during dry and lactating periods in dairy cows. Conference of Research Workers in Animal Diseases (CRWAD). December 3-7. Chicago, IL.

Gaire, T. I. Slizovskiy, B. Crooker, N. Noyes. 2021. Holstein cow genotype affects mammary skin microbiome during experimentally induced E.coli mastitis. Conference of Research Workers in Animal Diseases (CRWAD). December 3-7. Chicago, IL.

Cramer, G., Caixeta, L.S., Knauer, W., Shepley, E., Crooker, B., Solano, L., Wagner, S. “Development of a sole ulcer induction model in Holstein heifers: the next step in lameness research.” 54th Annual Conference of the American Association of Bovine Practitioners. 2021.

Florentino, C.C., Caixeta, L.S., Shepley, E., Ruch, M., Silva, J.V.L., Crooker, B.A. “A randomized clinical trial assessing the effect of the timing of the administration of oral calcium supplementation on blood calcium and magnesium concentrations after calving in dairy cows.” 54th Annual Conference of the American Association of Bovine Practitioners. 2021.

Cramer, G., Caixeta, L.S., Knauer, W., Shepley, E., Crooker, B., Solano, L., Wagner, S. “Development of a sole ulcer induction model in Holstein heifers: the next step in lameness research.” ADSA Conference. 2021.

Brink, A. A., W. J. Weber, J. D. Lippolis, J. B. Cole, S. M. Godden and B. A. Crooker. 2021. Effect of Holstein milk yield genotype on ex-vivo innate immune response to lipopolysaccharide (LPS) and lipoteichoic acid (LTA) during the periparturient period. J. Dairy Sci. July 11-14.

Guo, Y., W. J. Weber, D. Yao, E. Block, T.Rehberger, N. Zimmerman, J. Thompson,  B. A. Crooker, C. Chen. Metabolic fates of intraruminal rutin in dairy cows. American Chemistry Society - Agricultural Chemistry Section. April 5, 2021 (virtual).

Godden, S. M., F. Pẽna Mosca, E. Royster, B. A. Crooker, J. Hadrich, P. Raynor, R. Singer, and K. Janni. 2020. Management of recycled manure solids bedding on Midwest dairy farms. Part 1 - Relationship between processing method, udder health and production, and bedding bacteria counts. Proc. 60th Annu. Conf National Mastitis Council. Jan. 25-28, 2021 (virtual).

Peña Mosca, F., S. M. Godden, E. Royster, B. A. Crooker, P. Raynor, R. Singer and K. Janni. 2020. Management of recycled manure solids bedding on Midwest dairy farms. Part 2 - Relationship between processing method, bedding characteristics and bedding bacterial counts. Proc. 60th Annu. Conf National Mastitis Council. Jan. 25-28, 2021 (virtual).

Lippolis, J. D., E. J. Putz, T. A. Reinhardt, E. Casas, W. J. Weber, B. A. Crooker. 2020. The effect of 50 years of breeding on the ability of Holsteins to fight mastitis. 17th International Annual Symposium on Milk Science and Health. Oct. 13-16, Davis, CA. (virtual).

Guo, Y., W. J. Weber, B. A. Crooker and C. Chen. 2020. Alteration of choline metabolism in early lactation of Holstein cows revealed by metabolomics analysis. 2^nd Annual Metabolomics Association of North America conference - online/virtual, September 14-16.

Godden, S. M., F. Pena Mosca, E. Royster, B. Crooker, J. Hadrich, P. Raynor, R. Singer, K. Janni, J. Bender, B. Alexander. 2020. Investigation of the relationship between method of processing recycled manure solids bedding and udder health and production on Midwest dairy farms. Proc. Annu. Mtg. Am Assoc. Bovine Pract. Sept. 24-26, 2020. (virtual).

Godden, S. M., F. Pena Mosca, E. Royster, B. Crooker, J. Hadrich, P. Raynor, R. Singer, K. Janni, J. Bender, B. Alexander. 2020.^. Investigation of the relationship between method of processing and bacteria counts in ready-to-use recycled manure solids bedding on Midwest dairy farms. Proc. Annu. Mtg. Am Assoc. Bovine Pract. Sept. 24-26, 2020. (virtual).

Melson, S., W. J. Weber, E. Powell, D. Zimmerman, J. Lippolis, and B. A. Crooker. 2019. Is the contemporary Holstein more susceptible to E. coli mastitis than her ancestors? Minnesota Dairy Health Conference. April 17. St. Paul, MN.

Caixeta L.S., W. J. Weber, D. M. Johnson, J. Faser, B. M. Visser and B. A. Crooker. 2019. MegAnion as an anionic salt source in prepartum negative dietary cation-anion difference diets for multiparous dairy cows. J. Dairy Sci. Vol. 102(Suppl. 1.):385.

Guo, Y., B. A. Crooker and C. Chen. 2019. Influences of genetic selection on hepatic and serum lipidomes of prepartum and postpartum Holstein cows. 3rd Annual Big Ten Academic Alliance Lipid Conference, Minneapolis, MN  09/27/19

Lippolis, J. D., E. J. Putz, T. A. Reinhardt, E. Casas and B. A. Crooker. 2019. What 50 years of breeding has done to the ability of Holsteins to fight mastitis. 100th Conference of Research Workers in Animal Diseases. P. 100. November 3. Chicago, IL.

Rowe, S. M., S. M. Godden, E. Royster, J. Timmerman, B. A. Crooker, M. Boyle. 2019. Cross-sectional study of bedding bacteria counts and intramammary infection in late lactation dairy cows. 100th Conference of Research Workers in Animal Diseases. P. 167. November 3. Chicago, IL.

Patel, K., S. Godden, E. Royster, J. Timmerman, B. A. Crooker, and L. Fox. 2018. Investigating the relationship between bedding bacterial counts, bedding characteristics and management practices with udder health on U.S. dairy farms: Preliminary Results. National Mastitis Council 57th Annual Meeting, Tucson, AZ. January 30 to February 2.

Patel, K., S. Godden, E. Royster, J. Timmerman, B. A. Crooker and L. Fox. 2018. Investigation of the relationship between bacteria counts and bedding characteristics with udder health and milk quality on U.S. dairy farms: preliminary results. American Association of Bovine Practitioners. St. Louis, MO. September 13 to 15.

Rowe, S., S. Godden, E. Royster, J. Timmerman, B. A. Crooker and M. Boyle. 2018. Investigation of the relationship between bedding materials, bedding characteristics, and intramammary infection in late lactation dairy cows: interim findings. American Association of Bovine Practitioners. St. Louis, MO. September 13 to 15.

Li, Y., S. Cui, X. Yang, B.A. Crooker, S.K. Baidoo, and L.J. Johnston. 2017. Salivary cortisol concentrations of group-housed gestating sows: Individual vs. group samples. J. Anim. Sci. 95 (Suppl. 2): 8-9. (Abstr. 18).

Patel, K., S. Godden, E. Royster, J. Timmermen, B. Crooker, and L. Fox. 2017. Investigation of the relationship between bacteria counts, bedding characteristics and bedding management practices with udder health and milk quality on dairy farms: preliminary results. Amer. Assoc. of Bovine Pract. Annual Conf., Omaha, NE. Sep. 14-16.

Patel, K., S. Godden, E. Royster, J. Timmermen, B. Crooker, and N. McDonald. 2017. Pilot study: Impact of using a culture-guided selective dry cow therapy program targeting quarter-level treatment on udder health and antibiotic use. Natl. Mastitis Council 56th Annual Mtg., St. Pete Beach, FL. Jan. 29-31.

Smith, W.A., G. Cousillas, A.M. Rosales Gallardo, W.J. Weber, and B.A. Crooker. 2017. Impact of milk yield genotype and stress on accumulative cortisol concentrations in hair from Holstein cows. J. Dairy Sci. 100 (Suppl. 2):78.

Cousillas, G., W.J. Weber, B. Walcheck, R. Chebel, D. Kerr, T. Elsasser, and B.A. Crooker. 2016. Effect of milk yield genotype on hepatic metabolic gene expression and repeated lipopolysaccharide (LPS) administration. J. Anim. Sci. Vol. 94, E-Suppl. 5/ J. Dairy Sci. Vol. 99, E-Suppl. 1. 508.

Cousillas, G., W.J. Weber, B. Walcheck, R. Chebel, D. Kerr, T. Elsasser, and B.A. Crooker. 2016. Milk yield genotype affects hepatic expression of innate immune genes when challenged with lipopolysaccharide (LPS). J. Anim. Sci. Vol. 94, E-Suppl. 5/ J. Dairy Sci. Vol. 99, E-Suppl. 1. 356.

Cousillas, G., W.J. Weber, B. Walcheck, D. Kerr, T. Elsasser, and B.A. Crooker. 2016. Effect of milk yield genotype on hepatic metabolic gene expression during the transition period. J. Anim. Sci. Vol. 94, E-Suppl. 5/ J. Dairy Sci. Vol. 99, E-Suppl. 1. 509.

Cousillas, G., W.J. Weber, B. Walcheck, D. Kerr, T. Elsasser, and B.A. Crooker. 2016. Milk yield genotype impacts expression of hepatic innate immune genes during the transition period in Holsteins. J. Anim. Sci. Vol. 94, E-Suppl. 5/ J. Dairy Sci. Vol. 99, E-Suppl. 1. 508.

Ding, F., G. Cousillas, W.J. Weber, B.A. Crooker, and C. Chen. 2016. Effect of milk yield genotype on lipidomic profiles of multiparous Holstein cows during the first 9 weeks of lactation.  J. Anim. Sci. Vol. 94, Suppl. 2 / J. Dairy Sci. Vol. 99, Suppl. 1. 53.

Ponce de León, F.A., Y. Guo, B.A. Crooker, T.G. McDaneld, and T.P.L. Smith. 2016.
Identification and expression analysis of bovine X-degenerate Y-chromosome genes. 35th International Society for Animal Genetics Conf., Salt Lake City, UT. July.

Sorge, U., B.A. Crooker, A. Bastan, and M. Henriksen. 2016. Iodine concentration in tears, milk and serum after kelp supplementation. Proc. 29th World Buiatrics Congress 2016. P. 147.

Astessiano, A.L., R. Perez-Clariget, G. Quintans, P. Soca, B.A. Crooker, A. Meikle, and M. Carriquiry. 2012. Endocrine profiles periparturient primiparous rangeland beef cows that differ in body condition score (BCS) at calving. International Congress on Animal Reproduction (ICAR). Vancouver, British Columbia. July 29-Aug. 2.

Sonstegard, T.S., S. Wang, C.P. Van Tassell, L. Ma, G.R. Wiggans, B.A. Crooker, J.B. Cole, B.D. Mariani, E. Kim, J.R. Garbe, S.C. Fahrenkrug, G. Liu, and Y. Da. 2012. Signature of forty years of artificial selection in U.S. Holstein cattle identified by long-range frequency analyses. International Conf. on Quantitative Genetics: Understanding Variation in Complex Traits, Edinburgh, Scotland, June 17–22, Programme and Book of Abstracts, p. 213, Abstr. P-314.

Sonstegard, T.S., L. Ma, C.P. Van Tassell, J. Yang, S. Wang, J.B. Cole, G.R. Wiggans, B.A. Crooker, and Y. Da. 2011. Selection signature in the DGAT1-NIBP region of chromosome 14 in U.S. Holstein cattle. Plant and Animal Genome XVIII Conf., San Diego, CA. January.

Cole, J.B., T.S. Sonstegard, L. Ma, G.R. Wiggans, B.A. Crooker, C.P. Van Tassell, J. Yang, L. K. Matukumalli, and Y. Da. 2010. High resolution QTL map of net merit and component traits from genome-wide association analysis in contemporary U.S. Holstein cows. Plant and Animal Genome XVII Conf., San Diego, CA. January.

Ma, L., T.S. Sonstegard, J.B. Cole, G.R. Wiggans, B.A. Crooker, C.P. Van Tassell, J. Yang, L. K. Matukumalli, and Y. Da. 2010. X chromosome SNPs were heavily involved in epistasis effects of net merit component traits in contemporary U.S. Holstein cows. Plant and Animal Genome XVII Conf., San Diego, CA. January.

Wiggans, G.R., T.S. Sonstegard, L. Ma, J.B. Cole, T. Lawlor, B.A. Crooker, C.P. Van Tassell, J. Yang, L.K. Matukumalli, and Y. Da. 2010. High resolution QTL map of eighteen body conformation traits from genome-wide association analysis in contemporary U.S. Holstein cows. Plant and Animal Genome XVII Conf., San Diego, CA. January.

Astessiano, A.L., R. Pérez Clariget, G. Quintans, P. Soca, B.A. Crooker, and M. Carriquiry. 2009. Temporal changes in hepatic gene expression during the periparturient period of primiparous spring-calving beef cows on grazing conditions. J. Dairy Sci. 92(Suppl. 1):76.

Carriquiry, M., W.J. Weber, W.A. House, and B.A. Crooker. 2009. Hepatic mineral content of multiparous Holstein cows during lactation: Effects of bovine somatotropin and feeding n-3 fatty acids. J. Dairy Sci. 92(Suppl. 1):76.

Chen, C., W.J. Weber, M. Carriquiry, S.C. Fahrenkrug, and B.A. Crooker. 2009. Serum metabolomics of multiparous Holstein cows during the transition period. J. Dairy Sci. 92(Suppl. 1):71.

Garbe, J.R., M. Carriquiry, K. Clark, W.J. Weber, Y. Da, B.A. Crooker, and S.C. Fahrenkrug. 2009. Use of the BOMC 24K bovine oligonucleotide microarray to identify effects of parity and genetic merit on hepatic gene expression profiles in Holstein cows. Plant and Animal Genome XVII Conf., San Diego, CA. January.

Sonstegard, T.S., L. Ma, J.B. Cole, G.R. Wiggans, B.A. Crooker, C.P. Van Tassell, B.D. Mariani, M.V. da Silva, Y. Da. 2009. Genome signature of artificial selection for milk yield in Holstein cattle. Plant and Animal Genome XVII Conf., San Diego, CA. January.

Pérez-Clariget, R., C. López-Mazz, M. Regueiro, B.A. Crooker, and M. Carriquiry. 2008. Hyperglycaemia in day 9 of the estrous cycle did not increase ovulation rate in ewes but modified plasma IGF-I concentrations. P170. International Congress on Animal Reproduction. Budapest, Hungary. July 13-17.

Carriquiry, M., W.J. Weber, L.H. Baumgard, and B.A. Crooker. 2007. In vitro examination of rumen biohydrogenation (BH) of four dietary fats. Midwest ADSA, March 7.

Carriquiry, M., W.J. Weber, and B.A. Crooker. 2007. Dietary fat and bovine somatotropin (bST) for Holstein cows: Responses in early lactation. Midwest ADSA, March 7.

Carriquiry, M., W.J. Weber, S.C. Fahrenkrug, and B.A. Crooker. 2007. Hepatic gene expression in Holstein cows treated with bovine somatotropin (bST) and fed omega-3 fatty acids in early lactation. Midwest ADSA, March 7.

Crooker, B.A., W.J. Weber, S.C. Denham, and J.L. Vicini. 2007. Evaluation of an intraruminal pH probe. J. Dairy Sci. 90(Suppl. 1):562.

Rhoads, M.L., R.P. Rhoads, S.R. Sanders, S.H. Carroll, W.J. Weber, B.A. Crooker, R.J. Collier, M.J. VanBaale, and L.H. Baumgard. 2007. Effects of heat stress on production, lipid metabolism and somatotropin variables in lactating cows. J. Dairy Sci. 90(Suppl. 1):230.

Carriquiry, M., C.R. Dahlen, W.J. Weber, G.C. Lamb, and B.A. Crooker. 2006. Bovine somatotropin and dietary fat enriched with omega-3 fatty acids in dairy cows: III. Postpartum ovarian activity. J. Dairy Sci. 89(Suppl. 1):346.

Carriquiry, M., W.J. Weber, C.R. Dahlen, G.C. Lamb, and B.A. Crooker. 2006. Bovine somatotropin and dietary fat enriched with omega-3 fatty acids in dairy cows: I. Lactation performance. J. Dairy Sci. 89(Suppl. 1):63.

Carriquiry, M., W.J. Weber, C.R. Dahlen, G.C. Lamb, S.R. Sanders, L.H. Baumgard, and B.A. Crooker. 2006. Bovine somatotropin and dietary fat enriched with omega-3 fatty acids in dairy cows: II. Milk fatty acid composition. J. Dairy Sci. 89(Suppl. 1):63.

Carriquiry, M., W.J. Weber, C.R. Dahlen, G.C. Lamb, and B.A. Crooker. 2005. Effects of bST and dietary fat in early lactation on lactational performance of Holstein cows. J. Dairy Sci. 88(Suppl. 1):178.

Pollard, B.C., M.D. Estheimer, M.E. Dwyer, P.C. Gentry, W.J. Weber, E. Lemke, L.H. Baumgard, D.A. Henderson, B.A. Crooker, and R.J. Collier. 2005. The influence of parity, acclimatization to season, and recombinant bovine somatotropin (rbST) on diurnal patterns of prolactin and growth hormone in Holsteins exposed to heat stress. J. Dairy Sci. 88(Suppl. 1):121.

Wu, S.H., W.J. Weber, Y. Da, H. Chester-Jones, L.B. Hansen, Y. Boisclair, and B.A. Crooker. 2005. Leptin gene polymorphisms and selection for milk yield in Holstein cows. J. Dairy Sci. 88(Suppl. 1):170.

Annen, E.L., C.M. Stiening, M.E. Dwyer, B.A. Crooker, A.C. Fitzgerald, and R.J. Collier. 2004. Effects of continuous milking and prostaglandin E 2 on milk yield and composition. J. Dairy Sci. 87(Suppl. 1):132. Abstr. 223.

Carriquiry, M., S.H. Wu, W.J. Weber, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2004. Effect of selection for milk yield on hepatic prolactin receptor (PRLR) mRNA in Holstein cows. J. Dairy Sci. 87(Suppl. 1):94. Abstr. 67.

Crooker, B.A., W.J. Weber, C. Cheatham, L.H. Baumgard, and G.C. Duff. 2004. Effect of implant program on somatotropin (ST) response to growth hormone releasing factor (GRF) in finishing Holstein steers. J. Anim. Sci. 82(Suppl. 1):364.

Crooker, B.A., W.J. Weber, R.J. Collier, S.C. Denham, M.F. McGrath, and J.L. Vicini. 2004. Effect of intramammary infusion of bovine somatotropin (bST) on milk yield by cows induced to lactate. Biotech. Agron., Society and Environ. 8:28.

Jiang, H., M.C. Lucy, B.A. Crooker, and W.E. Beal. 2004. Liver expression of growth hormone receptor 1A mRNA is decreased in dairy cows but not in beef cows at parturition. J. Dairy Sci. 87(Suppl. 1):198. Abstr. T143.

Kay, J.K., W.J. Weber, H. Chester-Jones, L.B. Hansen, D.E. Bauman, B.A. Crooker, and L.H. Baumgard. 2004. Effects of genetic selection for milk yield and stage of lactation on milk fatty acid profiles. FASEB J. 18(4-5).

Radcliff, R.P., B.L. McCormack, B.A. Crooker, and M.C. Lucy. 2004. Plasma hormones and expression of growth hormone receptor (GHR) 1A and IGF-I mRNA in hepatic tissue of feed-restricted peri-parturient dairy cows. J. Dairy Sci. 87(Suppl. 1):195). Abstr. T127.

Weber, W.J., L.H. Baumgard, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2004. Effect of selection for milk yield on prolactin profiles in multiparous Holstein cows during the periparturient period. Biotech. Agron., Society and Environ. 8:31.

Wu, S.H., W.J. Weber, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2004. Effects of intake, selection for milk yield, and bST administration on hepatic expression of insulin receptors and components of the somatotropic axis in growing Holstein heifers. J. Dairy Sci. 87(Suppl.1):364. Abstr. W205.

Crooker, B.A., R.J. Collier, J.L. Vicini, M.F. McGrath, and W.J. Weber. 2003. Induced lactation: the need for enhanced mammary development and differentiation. J. Dairy Sci. 86(Suppl. 1).

Hafliger III, H.C., L.H. Baumgard, W.J. Weber, M. Chahine, G.C. Lamb, T.H. Klusmeyer, M.F. McGrath, J.L. Vicini, and B.A. Crooker. 2003. Effects of induced lactation on milk fatty acid profiles in multiparous Holstein cows. J. Dairy Sci. 86(Suppl. 1).

Luimes, P.H., E.H. Beaupré, J.H. White, W.J. Weber, H. Chester-Jones, L.B. Hansen, B.A. Crooker, and J.R. Knapp. 2003. The effect of phenotypic selection for milk production on hepatic expression of prolactin receptor. J. Dairy Sci. 86(Suppl. 1).

Lukas, J.M., W.J. Weber, R.J. Collier, J.L. Vicini, M.F. McGrath, and B.A. Crooker. 2003. Intramammary infusion of prostaglandin E (PGE) increases mammary development and milk yield of cows induced to lactate. J. Dairy Sci. 86(Suppl. 1).

Radcliff, R.P., B.L. McCormack, B.A. Crooker, and M.C. Lucy. 2003. Growth hormone (GH) binding in liver of periparturient Holstein cows is correlated with growth hormone receptor (GHR) 1A mRNA. J. Dairy Sci. 86(Suppl. 1).

Vicini, J.L., S.E. Bettis, C.R. Bilby, S.C. Denham, R.L. Hintz, J.L. Holst, E.D. Plunkett, B.A. Crooker, W.J. Weber, H. Chester-Jones, and M.E. Van Amburgh. 2003. Effects of Feed Management Program and POSILAC7 on Prepubertal Growth Rate of Replacement Dairy Heifers. J. Dairy Sci. 86(Suppl. 1).

Vicini, J.L., D.T. Galligan, S.E. Bettis, C.R. Bilby, S.C. Denham, R.L. Hintz, J.L. Holst, T.H. Klusmeyer, E.D. Plunkett, B.A. Crooker, W.J. Weber, and M.E. Van Amburgh. 2003. Effects of Prepubertal Growth Rate and POSILAC7 Treatment of Replacement Dairy Heifers on Subsequent Milk Production and Economics. J. Dairy Sci. 86(Suppl. 1).

Weber, W.J., S.J. Kolath, M.C. Lucy, H. Chester-Jones, L.B. Hansen and B.A. Crooker. 2003. Effect of genetic potential for milk yield on the onset of reproductive activity and corpus luteum function in Holstein cows. J. Dairy Sci. 86(Suppl. 1).

Block, S.S., R.P. Rhoads, D.E. Bauman, R.A. Ehrhardt, M.M. McGuire, B.A. Crooker, J.M. Griinari, T.R. Mackle, M.E. Van Amburgh, and Y.R. Boisclair. 2002. Role of insulin and growth hormone in regulating the concentration of plasma leptin in lactating dairy cows. J. Dairy Sci. 85(Suppl. 1):195.

Crooker, B.A., L.S. Ma, W.J. Weber, M.E. White, M.R. Hathaway, and W.R. Dayton. 2002. Effect of Revalor-S® on hepatic and muscle expression of components of the somatotropic axis in Simmental calves and yearling steers. J. Anim. Sci. 80(Suppl. 1):211.

Weber, W.J., C.R. Wallace, H. Chester-Jones, and B.A. Crooker. 2002. Serum insulin-like growth factor 1 and placental lactogen profiles in Holstein nulliparous and multiparous cows in early gestation. J. Dairy Sci. 85(Suppl. 1):9.

Weber, W.J., S.H. Wu, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2002. Effect of feed intake and genetic potential for milk yield on somatotropin (ST) response to growth hormone releasing factor (GRF) in Holstein heifers. J. Dairy Sci. 85(Suppl. 1):337.

Wu, S.H., W.J. Weber, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2002. Effect of feed intake, bST administration, and genetic potential for milk yield on hepatic IGF-I and growth hormone receptor mRNA in growing Holstein heifers. J. Dairy Sci. 85(Suppl. 1):337.

Chahine, M., W.J. Weber, J.K. Reneau, B.A. Crooker, T.H. Klusmeyer, M.F. McGrath, E.A. Reed, and J.L. Vicini. 2001. Induction of lactation during winter and summer seasons in non-pregnant reproductive cull Holstein cows. J. Dairy Sci. 84(Suppl. 1):389.

Crooker, B.A., L.S. Ma, and W.J. Weber. 2001. Use of real-time PCR to determine homogenity of hepatic IGF-I expression in steers with and without Revalor implants. Biotech., Agron. Soc. and Environ. 5(Special Issue):75.

Crooker, B.A., W.J. Weber, and L.S. Ma. 2001. Effect of selection for milk yield on the somatotropic axis of the Holstein cow: endocrine profiles and hepatic gene expression. Biotech., Agron. Soc. and Environ. 5(Special Issue):56.

Weber, W.J., S. Cieslak, and B.A. Crooker. 2001. Pre-challenge administration of GRF reduces variation in growth hormone response to GRF in growing Holstein heifers. Biotech., Agron. Soc. and Environ. 5(Special Issue):96.

Wu, S.H., M.P. Murtaugh, D.N. Foster, and B.A. Crooker. 2001. Development of a bovine Alpha-actin probe for ribonuclease protection assays. J. Dairy Sci. 84 (Suppl. 1).

Crooker, B.A., L. S. Ma, W.J. Weber, L.B. Hansen, and H. Chester-Jones. 2000. Effect of selection for milk yield on hepatic gene expression in the Holstein cow: the growth hormone (GH) receptor and insulin-like growth factor-I (IGF-I). J. Dairy Sci. 83:205.

McMullen, J.A., J.H. White, J.R. Knapp, W.J. Weber, H. Chester-Jones, L.B. Hansen, and B.A. Crooker. 2000. Evaluation of insulin receptor mRNA levels at different days pre and postpartum in liver tissue of genetically selected dairy cattle. J. Dairy Sci. 83:206.

Crawford Jr., R.J., W.H. Hoover, C.J. Sniffen, and B.A. Crooker. 1978. Degradation of feedstuff nitrogen in the rumen vs nitrogen solubility in three solvents. J. Anim. Sci. 46:1768-1775.

Crooker, B.A., C.J. Sniffen, W.H. Hoover, and L.L. Johnson. 1978. Solvents for soluble nitrogen measurements in feedstuffs. J. Dairy Sci. 61:437-447.

Stern, M.D., W.H. Hoover, C.J. Sniffen, B.A. Crooker, and P.H. Knowlton. 1978. Effects of nonstructural carbohydrate, urea and soluble protein levels on microbial protein synthesis in continuous culture of rumen contents. J. Anim. Sci. 47:944-956.

Hoover, W.H., B.A. Crooker, and C.J. Sniffen. 1976. Effects of differential solid liquid removal rates on protozoa numbers in continuous cultures of rumen contents. J. Anim. Sci. 43:528-534.

Knauer, W. A., S. M. Godden, A. K. Rendahl, M. I. Endres, and B. A. Crooker. The effect of individual versus pair housing of dairy heifer calves during the preweaning period on measures of health, performance, and behavior up to 16 weeks of age. 2020 Dec 23; S0022-0302(20)31077-8. doi: 10.3168/jds.2020-18928. In Press.

Patel, K., S. M. Godden, E. E. Royster, B. A. Crooker, T. J. Johnson, E. A. Smith and S. Sreevatsan. Prevalence, antibiotic resistance, virulence and genetic diversity of Staphylococcus aureus isolated from bulk tank milk samples of U.S. dairy herds. BMC Genomics. GICS-D-20-01845.

Crooker, B.A., M. Carriquiry, and W.J. Weber. 2007. Reproductive success in dairy cows: The linkage of milk yield, nutrition, and reproduction. Progressive Dairyman. June.