Les Hansen

Donnelly, M. R., A. R. Hazel, L. B. Hansen, and B. J. Heins. 2023. Health treatment cost of Holsteins in 8 high-performance herds. Animals 13(13):2061-2072.

Donnelly, M. R., A. R. Hazel, L. B. Hansen, and B. J. Heins. 2023. Genetic selection for reduced health treatment costs in Holstein cows: implications from a long-term study. Frontiers in Genetics 14:1254183.

Houdek, E. S., A. R. Hazel, N. Lopez-Villalobos, L. B. Hansen, and B. J. Heins. 2024. Lactation curves of Montbeliarde-sired and Viking Red-sired crossbred cows and their Holstein herdmates in commercial dairies. J. Dairy Sci. 106 (published online 1-19-24).

Pereira, G. M., B. J. Heins, B. Visser, and L. B. Hansen. 2022. Comparison of 3- breed rotational crossbreds of Montbeliarde, Viking Red, and Holstein with Holstein cows fed 2 alternative diets for dry matter intake, production, and residual feed intake. J. Dairy Sci. 105:8989-9000.

Pereira, G. M., L. B. Hansen, B. J. Heins. 2022. Birth traits of Holstein calves compared with Holstein, Jersey, Montbeliarde, Normande, and Viking Red-sires crossbred calves. J. Dairy Sci. 105:9286-9295

A.R. Hazel, B.J. Heins, and L.B. Hansen. 2021. Herd life, lifetime production, and profitability of Viking Red-sired and Montbeliarde-sired crossbred cows compared with their Holstein herdmates. J. Dairy Sci. 104:3261-3217.

E.S. Houdek, A.R. Hazel, B.J. Heins, N. Lopez-Villalobos, and L.B. Hansen. 2021. Lactation curves of Montbeliarde-sired and Viking Red-sired crossbred cows and their Holstein herdmates in 7 commercial dairies using random regression and Best Prediction. J. Dairy Sci. 103.

A.R. Hazel, B. J. Heins, and L.B. Hansen. 2020. Fertility and 305-day production of Viking Red-, Montbeliarde-, and Holstein-sired crossbred cows compared with Holstein cows during their first 3 lactations in Minnesota dairy herds. J. Dairy Sci. 103:8683-8697.

A.R. Hazel, B. J. Heins, and L.B. Hansen. 2020. Health treatment cost, stillbirth, survival, and conformation of Viking Red-, Montbéliarde- , and Holstein-sired crossbred cows compared with pure Holstein cows during their first 3 lactations. J. Dairy Sci. 103:10917-10939.

Hazel, A. R., B. J. Heins, and L. B. Hansen. 2020. Health treatment cost, stillbirth, survival, and conformation of Viking Red-, Montbéliarde- , and Holstein-sired crossbred cows compared with pure Holstein cows during their first 3 lactations. J. Dairy Sci. 103: In press.

Hazel, A. R., B. J. Heins, and L. B. Hansen. 2020. Fertility and 305-day production of Viking Red-, Montbeliarde-, and Holstein-sired crossbred cows compared with Holstein cows during their first 3 lactations in Minnesota dairy herds. J. Dairy Sci. 103:8683-8697.

Shonka-Martin, B. N., A. R. Hazel, B. J. Heins, and L. B Hansen. 2019. Three-breed rotational crossbreds of Montbeliarde, Viking Red, and Holstein compared with Holstein cows for dry matter intake, body traits, and production. J. Dairy Sci. 102:871-882. 

Shonka-Martin, B. N., A. R. Hazel, B. J. Heins, and L. B Hansen. 2019. Three-breed rotational crossbreds of Montbeliarde, Viking Red, and Holstein compared to Holstein cows for feed efficiency, income over feed cost, and residual feed intake. J. Dairy Sci. 102:3661-3673. 

Hazel, A.R., B.J. Heins, and L.B. Hansen. 2017. Fertility, survival, and conformation of Montbéliarde × Holstein and Viking Red × Holstein crossbred cows compared with pure Holstein cows during first lactation in 8 commercial dairy herds. J. Dairy Sci. 100:9447-9458. doi:10.3168/jds.2017-12824.

Hazel, A.R., B.J. Heins, and L.B. Hansen. 2017. Production and calving traits of Montbéliarde × Holstein and Viking Red × Holstein cows compared with pure Holstein cows during first lactation in 8 commercial dairy herds. J. Dairy Sci. 100(5):4139-4149. doi:10.3168/jds.2016-11860.

Hazel, A.R., B.J. Heins, A.J. Seykora, and L.B. Hansen. 2014. Production, fertility, survival, and body measurements of Montbeliarde-sired crossbreds compared with pure Holsteins during their first 5 lactations. J. Dairy Sci. 97: 2512-2525.

Mendonça, L.G.D., C.C. Abade, E.M. da Silva, N.B. Litherland, L.B. Hansen, W.P. Hansen, and R.C. Chebel. 2014. Comparison of peripartum metabolic status and postpartum health of Holstein and Montbeliarde-sired crossbred dairy cows. J. Dairy Sci. 97: 805-818.

Hazel, A.R., B.J. Heins, A.J. Seykora, and L.B. Hansen. 2013. Montbeliarde-sired crossbreds compared with pure Holsteins for dry matter intake, production, and body traits during the first 150 days of first lactation. J. Dairy Sci. 96:1915-1923.

Mendonça, L.G.D., C.C. Abade, E.M. da Silva, N.B. Litherland, L.B. Hansen, W.P. Hansen, and R.C. Chebel. 2013. Comparison of peripartum metabolic status and postpartum health of Holstein and Montbeliarde-sired crossbred dairy cows. J. Dairy Sci. 96: Published electronically.

Mendonça, L.G.D., N.B. Litherland, M.C. Lucy, D.H. Keisler, M.A. Ballou, L.B. Hansen, and R.C. Chebel. 2013. Comparison of innate immune responses and somatotropic axis components of Holstein and Montbeliarde-sired crossbred dairy cows during the transition period. J. Dairy Sci. 96:3588-3598.

Becker, J.C., B.J. Heins, L.B. Hansen. 2012. Costs for health care of Holstein cows selected for large versus small body size. J. Dairy Sci. 95:5384-5392.

Heins, B.J. and L.B. Hansen. 2012. Fertility, somatic cell score, and production of Normande × Holstein, Montbeliarde × Holstein, and Scandinavian Red × Holstein crossbreds versus pure Holsteins during their first 5 lactations. J. Dairy Sci. 95:918-924.

Heins, B.J., L.B. Hansen, and A. De Vries. 2012. Survival, lifetime production, and profitability of Normande × Holstein, Montbeliarde × Holstein, and Scandinavian Red × Holstein crossbreds versus pure Holsteins. J. Dairy Sci. 95:1011-1021.

Blottner, S., B.J. Heins, M. Wensch-Dorendorf, L.B. Hansen, and H.H. Swalve. 2011. Brown Swiss x Holstein crossbreds compared to pure Holsteins for calving traits, body weight, backfat thickness, fertility, and body measurements. J. Dairy Sci. 94:1058-1068.

Heins, B.J., L.B. Hansen, A.J. Seykora, A.R. Hazel, D.G. Johnson, and J.G. Linn. 2011. Jersey × Holstein crossbreds compared with pure Holsteins for production, mastitis, and body measurements during the first 3 lactations. J. Dairy Sci. 94:501-506.

Heins, B.J., L.B. Hansen, A.R. Hazel, A.J. Seykora, D.G. Johnson, and J.G. Linn. 2010. Birth traits of pure Holstein calves versus Montbeliarde-sired crossbred calves. J. Dairy Sci. 93:2293-2299.

Bleck, G.T., M.B. Wheeler, L.B. Hansen, H. Chester-Jones, and D.J. Miller. 2009. Lactose synthase component in milk: Concentrations of α-lactalbumin and β1,4-galactosyltransferase in milk of cows from several breeds at various stages of lactation. Reprod. Dom. Anim. 44:241-247.

Brunelle, B.W., M.E. Kehrli, Jr., J.R. Stabel, D. Moody Spurlock, L.B. Hansen, and E.M. Nicholson. 2008. Allele, genotype, and haplotype data for BSE-resistance polymorphisms from healthy U.S. Holstein cattle. J. Dairy Sci. 91:338-342.

Heins, B.J., L.B. Hansen, A.J. Seykora, A.R. Hazel, D.G. Johnson, and J.G. Linn. 2008. Crossbreds of Jersey × Holstein compared with pure Holsteins for body weight, body condition score, dry matter intake, and feed efficiency during the first one hundred fifty days of first lactation. J. Dairy Sci. 91:3716-3722.

Heins, B.J., L.B. Hansen, A.J. Seykora, D.G. Johnson, J.G. Linn, J.E. Romano, and A.R. Hazel. 2008. Crossbreds of Jersey × Holstein compared with pure Holsteins for production, fertility, and body and udder measurements during first lactation. J. Dairy Sci. 91:1270-1278.

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.

Fuquay, J.W., R.T. Marshall, W.P. Weiss, H.A. Tucker, L.B. Hansen, and R.K. McGuffey. 2006. Foreword - Centennial issue: Major advances in dairy science in the last 25 years. J. Dairy Sci. 89:1121.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2006. Calving difficulty and stillbirths of pure Holsteins versus crossbreds of Holstein with Normande, Montbeliarde, and Scandinavian Red. J. Dairy Sci. 89: 2805-2810.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2006. Fertility and survival of pure Holsteins versus crossbreds of Holstein with Normande, Montbeliarde, and Scandinavian Red. J. Dairy Sci. 89: 4944-4951.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2006. Production of pure Holsteins versus crossbreds of Holstein with Normande, Montbeliarde, and Scandinavian Red. J. Dairy Sci. 89: 2799-2804.

Kay, J.K., W.J. Weber, C.E. Moore, D.E. Bauman, L.B. 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 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. Growth hormone response to growth hormone releasing hormone in calves that differ in genetic merit for milk yield. J. Dairy Sci. 88:1723-1731.

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.

Chrystal, M.A., A.J. Seykora, L.B. Hansen, A.E. Freeman, D.H. Kelley, and M.H. Healey. 2001. Heritability of teat-end shape and the relationship of teat-end shape with somatic cell score for an experimental herd of cows. J. Dairy Sci. 84:2549-2554.

Hansen, L.B. 2000. Consequences of selection for milk yield from a geneticist's point of view. J. Dairy Sci. 83:1145-1150.

Kelm, S.C., A.E. Freeman, A.L. Brundage, R.E. Pearson, T.G. Martin, L.D. McGilliard, L.B. Hansen, C.W. Young, H.H. Voelker, G.E. Shook and W.J. Tyler. 2000. Direct and correlated responses to selection for milk yield: Results and conclusions of regional project NC-2, "Improvement of dairy cattle through breeding, with emphasis on selection." J. Dairy Sci. 83:2721-2732.

Nash, D.L., G.W. Rogers, J.B. Cooper, G.L Hargrove, J.F. Keown, and L.B. Hansen. 2000. Heritability of clinical mastitis incidence and relationships with sire transmitting abilities for somatic cell score, udder type traits, productive life, and protein yield. J. Dairy Sci. 83:2350-2360.

Chrystal, M.A., A.J. Seykora, and L.B. Hansen. 1999. Heritabilities of teat end shape and teat diameter and their relationships with somatic cell score. J. Dairy Sci. 82:2017-2022.

Hansen, L.B., J.B. Cole, G.D. Marx, and A.J. Seykora. 1999. Productive life and reasons for disposal of Holstein cows selected for large versus small body size. J. Dairy Sci. 82:795-801.

Starkenburg, R.J., L.B. Hansen, M.E. Kehrli, Jr., and H. Chester-Jones. 1997. Frequencies and effects of alternative DRB3.2 alleles of bovine lymphocyte antigen for Holsteins in milk selection and control lines. J. Dairy Sci. 80:3411-3419.

Jones, W.P., L.B. Hansen, and H. Chester-Jones. 1994. Response of health care to selection for milk yield of dairy cattle. J. Dairy Sci. 77:3137-3152.

2010

"Survival, fertility, and production of Normande x Holstein, Montbeliarde x Holstein, and Scandinavian Red x Holstein crossbred cows"
Heins, B.J. and L.B. Hansen
Oral presentation #843
9th World Congress, Leipzig, Germany

2006

"Monitoring the worldwide genetic supply for dairy cattle with emphasis on managing crossbreeding and inbreeding"
8th World Congress, Belo Horizonte, Brazil

1998

"Body size of lactating dairy cows: Results of divergent selection for over 30 years"
6th World Congress, Armidale, Australia

1990

"Net value of genetic improvement: Current stocks versus controls"
4th World Congress, Edinburgh, Scotland

2021

L. B. Hansen - Invited Symposium Speaker, Annual Meeting of the American Dairy Science Association

July 14, 2021 - Teaching/Education Symposium: Education and Workforce Development in the Online Learning World - “Experiences in engaging undergraduate students in dairy club activities online”

L. B. Hansen - Invited Symposium Speaker, Annual Meeting of the American Dairy Science Association

July 14, 2021 - Breeding and Genetics Symposium: Crossbreeding - “Capitalizing on breed differences and heterosis

2020

“ProCROSS^© compared to Holstein – University of Minnesota research”

L. B. Hansen – guest speaker (global press conference)

- September 29, 2020

- Facebook Live

2019

“10-year comparison of ProCROSS© and Holstein cows in well-managed Minnesota herds”
L. B. Hansen – Invited Speaker (for dairy producer audience)
ProCROSS© International Conference
- July 2, Friesland, The Netherlands

“ProCROSS© compared to Holstein – University of Minnesota research”
L. B. Hansen – Invited Speaker (for journalists)
ProCROSS© International Conference
- July 2, Friesland, The Netherlands

“The future of U.S. dairy data collection for genetic improvement and for management decisions”
L. B. Hansen – Invited Speaker
Strategic Planning Session, Board of Directors, National Dairy Herd Improvement Association
- May 1, Bloomington, Minnesota

2018

“ProCROSS© compared to Holstein – University of Minnesota research”
L. B. Hansen – Invited Speaker
ProCROSS© International Conference
- July 12, Lisbon, Portugal

“ProCROSS© compared to Holstein – University of Minnesota research”
L. B. Hansen – Invited Speaker
Educational programming for dairy producers
- July 18, Market Drayton, Shropshire, England

“ProCROSS© compared to Holstein – University of Minnesota research”
L. B. Hansen – Invited Speaker
Educational programming for dairy producers
- July 19, Tauton, Somerset, England

“Genomics – What it is and what it isn’t”
L. B. Hansen – Invited Speaker
Pine Creek Nutrition Service Fall Seminar
- October 11, Turlock Country Club, Turlock, CA

2017

“Dairy cattle crossbreeding – Why is there interest and what are the results?”
L. B. Hansen – Invited Speaker
Oberweis Dairy Processor Annual Dairy Producer Meeting
- Lake Geneva, Wisconsin
- February 23, North Aurora, Illinois

“Crossbreeding: ‘Normal’ for Beef and Port, why not for Dairy?”
L. B. Hansen – Invited Speaker
Minnesota Milk Producers Association Annual Dairy Conference & Expo
- November 29, Treasure Island Resort & Casino, Afton, Minnesota

2016

“Status of crossbreeding research and uptake of crossbreeding of dairy cattle”
L. B. Hansen – Invited Speaker & Member of international executive committee
International Red Dairy Breeds Federation
- June 12-16, Hamar, Norway

2014

“Results from crossbreeding research with dairy cattle”
L. B. Hansen – Invited Speaker
Genex Cooperative educational seminar in conjunction with Central Plains Dairy Expo
- March 25, Sioux Falls, SD

2013

"Results from crossbreeding research with dairy cattle"
L.B. Hansen, Invited Speaker
Educational Seminar for Wisconsin Dairy Producers
Hosted by Global Genetic Resources
- December 13; Downing, Wisconsin

"Genetics for the whole cow: Breeding for grazing systems"
L.B. Hansen, Moderator
Panel Discussion within an Educational Seminar, World Dairy Expo
Jointly hosted by a large number of agricultural firms
- October 4; Madison, Wisconsin

"ProCROSS – Results from research in the U.S."
L.B. Hansen, Invited Speaker
Educational Seminar for Azorean Dairy Producers
Hosted by Viking Genetics and Coopex Montbeliarde
- July 29; S. Miguel, The Azores (islands in the Pacific Ocean)
- July 30; Terceira, The Azores (islands in the Pacific Ocean)

"ProCROSS – Results from research in the U.S."
L.B. Hansen, Invited Speaker
Educational Seminar for Portugese Dairy Producers
Hosted by Viking Genetics and Coopex Montbeliarde
- July 26; Lisbon, Portugal

"Crossbreds from the use of Red Breeds – Latest research from the U.S."
L.B. Hansen, Invited Speaker
International Conference of the International Red Dairy Breeds Federation
- May 6; Schleswig, Germany

"Is crossbreeding for you?" (professionally recorded with 1,261 views on YouTube)
L.B. Hansen, Invited Speaker and participant in panel discussion
Educational program hosted by Progressive Dairyman magazine, World Ag Expo
- February 12; Tulare, California

"Reseach on crossbreeding" (professionally recorded with 500 views on YouTube)
L.B. Hansen, Invited Speaker
Educational program hosted by Progressive Dairyman magazine, World Ag Expo
- February 12; Tulare, California

2012

"Latest results of research on 3-breed rotational crossbreeding with ProCROSS"
L.B. Hansen, Invited Speaker
Educational Seminar for Veterinarians
Quarterly meeting of the North Regional Veterinary Medicine Association of Italy
- November 16; Reggio Emilia, Italy

"Latest results of research on 3-breed rotational crossbreeding with ProCROSS"
L.B. Hansen, Invited Speaker
Educational Seminars for Italian Dairy Producers
Hosted by the Genesi Project
- November 14; Cremona, Italy
- November 15; Vincenza, Italy

"ProCROSS – Results from research in the U.S."
L.B. Hansen, Invited Speaker
Media Conference
Hosted by CRV Deutschland
Held in conjunction with Eurotier, the international agricultural trade show
- November 12; Hanover, Germany

"Is our dairy cow sustainable for the future?"
L.B Hansen, Invited Speaker
Minnesota-Wisconsin Dairy Directors' Leadership Conference
Hosted by Cooperative Network and University of Wisconsin Extension
- April 4; Eau Claire, Wisconsin

2011

"The final results of 10 years of crossbreeding by six dairies in California"
L.B. Hansen, Invited Speaker
Educational Seminar for International Visitors, World Dairy Expo
Hosted by the Viking Genetics, and Coopex Montbelairde
- October 6; Madison, Wisconsin

"The latest on crossbreeding of dairy cattle"
L.B. Hansen, Invited Speaker
Educational Seminar for Michigan Dairy Producers
Hosted by the Deckerville Veterinary Clinic
- March 15; Deckerville, Michigan

"Directions of the world red cow"
Guest speaker, James Hill Memorial Red Tie Dinner
Hosted by Australian Red Dairy Cattle Breed (Aussie Red) Association
- January 15, 2011; Moama, Victoria, Australia

"Dairy cattle crossbreeding – the California experience"
Educational programs for dairy producers
Hosted by the Australian Red Dairy Breed (Aussie Red) and AusRed Genetics
- January 7, 2011; Numbaa, New South Wales, Australia
- January 11, 2011; Bussleton, Western Australia, Australia
- January 14, 2011; Kyabram, Victoria, Australia

2010

"The milk of the world in the future"
Educational programs for dairy producers
Hosted by Solla, which is a large livestock nutrition firm
- October 11, 2010; Antioquia, Colombia
- October 12, 2010; Medellin, Colombia
- October 13, 2010; Bogota, Colombia

"The final results of 10 years of crossbreeding by six dairies in California"
Educational program for dairy producers
Hosted by the Genesi Project
- June 2, 2010; Vincenza, Italy
- June 3, 2010; Cremona, Italy

2009

"Crossbreeding of dairy cattle: Facts versus myths"
Graduate student seminar series
Martin Luther University, Halle-Wittenberg
- November 24, 2009; Halle, Germany

"Crossbreeding studies involving research herds and cooperating commercial dairies"
Scientific Exchange Symposium with U.S. and European Dairy Cattle Geneticists held in conjunction with annual meeting of Multi-State Research Project S-1040
- November 18, 2009; Paris, France

"How to add value to milk production by means of crossbreeding"
International Congress Agrotech
- July 9, 2009; Santiago, Chile

"Results from crossing breeds of dairy cattle in California"
Live symposium simultaneously broadcast via interactive video and audio link to three remote locations throughout Costa Rica
Hosted by Dos Pinos Milk Cooperative
- May 27, 2008; San Jose, Costa Rica

"Crossbreeding in dairy cattle"
Educational program for veterinarians and dairy producers
Minnesota Dairy Herd Health Conference
- May 21, 2009; Continuing Education Center, University of Minnesota

"Results from crossbreeding of dairy breeds in California"
International Dairy Symposium
Expo Leche Aguascalientes
- April 21, 2009; Aguascalientes, Mexico

"Where the Normande breed should go from here"
Long-term strategic planning for the Normande Breed
Hosted by French Normande breed association ("O.S. Normande")
- March 3, 2009; Normandy, France

"The California experience with crossbreeding"
Educational program for dairy producers and semen marketing agents
Hosted by Creative Genetics of California in conjunction with World Ag Expo
- February 13, 2009; Oakdale, California

2008

"A global view of dairy breeds and crosses among them"
Educational field day for dairy producers
Hosted by X-Sires Genetic Marketing Organization
- December 10, 2008; Zwolle, The Netherlands

"The breeds of dairy cattle and results from crossbreeding"
Educational programs for dairy producers
Hosted by Genus/ABS Global A.I. Centre Educational Programs
- November 12, 2008; Derbyshire, England
- November 12, 2008; Ashington, Sussex, England
- November 13, 2008; Cheshire Grassland Society, Nantwich, England

"A global view of dairy breeds and crosses among them"
Contribution to German National Conference: "Crossbreeding: The Solution for Dairy Cattle Breeding?"
Hosted by CRV Deutschland A.I. Organization
- November 10, 2008; Hanover, Germany

"What is the status of the Holstein breed for functionality?"
Standard Nutrition Annual Consultants' Conference
- October 22, 2008; Omaha, Nebraska

"Crossbreeding in dairy cattle: Why so much interest?"
Standard Nutrition Annual Consultants' Conference
- October 23, 2008; Omaha, Nebraska

"Low-input dairying: Crossbreeding for profit"
International Normande Congress (CINOR)
- September 30, 2008; World Dairy Expo, Madison, Wisconsin

"Crossbreeding of dairy cattle"
Educational programs for dairy producers
Hosted by CRV Holland A.I. organization
- June 18, 2008; Nuland, The Netherlands
- June 16, 2008; Heerenveen, The Netherlands

"Crossbreeding of dairy cattle"
Educational programs for dairy producers
- June 13, 2008; Vila Franca de Xira, Portugal
- June 11, 2008; Vairao Vila do Conde, Portugal

"Crossbreeding of dairy cattle in California"
Educational program for dairy producers
- May 17, 2008; Nueva Helvecia, Uruguay
- May 16, 2008; Carmelo, Uruguay

"Crossbreeding of dairy cattle in California"
Educational program for dairy producers
Hosted by the Nogales A.I. Center
- May 14, 2008; Navarro, Argentina
Invited symposium presentation
Hosted by the National University of Litoral
- May 12, 2008; Esperanza, Argentina
Invited speaker for Mercolactea, which is the national dairy exposition
- May 10, 2008; San Francisco, Argentina

"What should a functional cow look like?
Invited speaker for Mercolactea, which is the national dairy exposition
- May 9, 2008; San Francisco, Argentina

"Genetics is crucial for fertility of high-producing dairy cows: The ABCs of purebreeding and crossbreeding"
Educational program for dairy producers
Hosted by Deckerville Veterinary Clinic
- March 20, 2008; Deckerville, Michigan

2007

"Genetics is crucial for fertility of high-producing dairy cows: The ABCs of purebreeding and crossbreeding"
Educational programs for dairy producers
I-29 Dairy Conference (3 locations)
- January 30, 2008; Brookings, South Dakota
- January 31, 2008; Sheldon, Iowa
- February 1, 2008; Pipestone, Minnesota

"Results from the California study on crossbreeding and optimal approaches for systematic crossbreeding"
Educational programs for dairy producers
Sponsored by Genetics Australia
- October 22, 2007; Tyers, Australia
- October 23, 2007; Terang, Australia
- October 25, 2007; Kyabram, Australia

"Strategies for crossbreeding of dairy cattle to improve economic performance"
Invited presentation
"Interleite" Symposium
Hosted by AgriPoint Consultants
- August 3, 2007; Uberlandia, Brazil

"Red breeds – A genetic resource for crossbreeding" and "Results from the California study on crossbreeding and optimal approaches for systematic crossbreeding"
Invited presentations
Conference of the International Red Cow Club
- July 12 and 13, 2007; Malmo, Sweden

"Crossbreeding of dairy cattle: science fiction or reality?"
Invited conference speaker
EuroVacum International Bovine Conference
- June 7, 2007; Barcelona, Spain

"Crossbreeding experience in the USA"
Sponsored educational program for dairy producers on crossbreeding to provide alternative genetics for milk production
- June 5, 2007; Pamplona, Navarra, Spain

"Genetic improvement of fertility and health of dairy cows might be easier than you think"
Educational program for professional dairy nutritionists
California Nutrition Conference
- May 10, 2007; Modesto, California

"Genetic improvement of fertility and health of dairy cows might be easier than you think"
Educational programs for dairy producers
Oklahoma Dairy Days
- February 12, 2007; Chickasha, Oklahoma
- February 14, 2007; Pryor, Oklahoma

2006

"Breeding healthy, fertile, high-producing dairy cows"
Educational program for dairy producers
North Dakota Dairy & Pork Producers' Convention
- November 28, 2006; Fargo, North Dakota

"Why are dairy producers crossbreeding?"
Guest invited speaker
Board of Directors, Holstein Association USA
- November 17, 2006; Fresno, California

"Holstein cows mated to A.I. sires from the Scandinavian Red, Montbeliarde, and Normande breeds"
Educational program for dairy producers
International Seminar on Competitive Milk Production
Sponsored by Colanta Corporation (Colombia's major milk processor)
- October 19, 2006; Medellin, Colombia

"Developing the ideal dairy cow: The future of dairy cattle genetics"
Educational program for dairy producers
Colombian National Dairy Cattle Show
Sponsored by the Colombian Ayrshire Association
- July 21, 2006; Bogota, Colombia

"Fertility and crossbreeding: The future of dairy cattle breeding"
Educational programs for dairy producers
Sponsored by the Genesi Project
- June 9, 2006; Vicenza, Italy
- June 10, 2006; Cremona, Italy

"A global overview of the changing dynamics for dairy cattle breeding"
Annual meeting guest speaker
Geno (national A. I. cooperative of Norway)
- April 25, 2006; Hamar, Norway

"The future challenge for Holstein breeding: A show cow or a functional cow?"
Educational program for Holstein breeders
Sponsored by Rinderzucht Schleswig-Holstein (RSH) A. I. Cooperative
- March 16, 2006; Neumunster, Germany

"The role of Red dairy cattle breeds for commercial milk production around the world"
Educational program for Angler breeders
Sponsored by Rinderzucht Schleswig-Holstein (RSH) A. I. Cooperative
- March 14, 2006; Schleswig, Germany

"Health and fertility of the modern dairy cow – the genetic challenge for the future"
Educational program for dairy producers
Sponsored by Svensk Avel (Sweden's national A.I. cooperative)
- January 23, 2006; Uppsala, Sweden
- January 24, 2006; Lovanger, Sweden
- January 25, 2006; Laholm, Sweden
- January 26, 2006; Holstein Association Winter Meeting, Sweden
- January 27, 2006; Skara, Sweden

"Health and fertility of the modern dairy cow – the genetic challenge for the future"
Educational program for dairy producers
Agromek Winter Exposition
Sponsored by Dansire (Denmark's national A.I. cooperative)
- January 17, 2006; Herning, Denmark

2005

"Improving profitability through crossbreeding"
Educational programs for dairy producers
Hosted by AgriSearch of Northern Ireland
- December 5, 2005; Ballynahinch, Northern Ireland
- December 6, 2005; Enniskillen, Northern Ireland

"The California experience with crossbreeding Holstein cows with AI sires
from Scandinavia and France"
Educational programs for dairy producers
Hosted by Milk Development Council, U.K.
- November 24, 2005; Risely, Derbyshire, England
- November 24, 2005; Alcester, Warwickshire, England
- November 25, 2005; Holmes Chapel, Cheshire, England
- November 28, 2005; Chirk, Llangollen, Wales
- November 29, 2005; Marlborough, Wiltshire, England
- November 29, 2005; Buckfastleigh, Devon, England
- November 30, 2005; Nortallerton, Yorkshire, England
- December 1, 2005; Wigton, Cumbria, England
- December 1, 2005; Rugby Park, Kilmarnock, Scotland
- December 2, 2005; Inverurie, Aberdeen, Scotland

"The California experience with crossbreeding Holsteins with AI sires
from Scandinavia and France"
Educational programs for genetic staff and dairy producers
Genetics Australia
- November 7, 2005; Melbourne, Victoria, Australia

"The California experience with crossbreeding Holsteins with AI sires
from Scandinavia and France"
Invited symposium speaker
Dairy Research Foundation Symposium, University of Sydney
- November 3, 2005; Camden, NSW, Australia

"What should a functional cow look like?" and "Crossbreeding trials in California"
Invited conference speaker
International Red Cow Conference
Hosted by International Red Cow Club
- June 9 and 10, 2005; Zulu-Natal, South Africa

"Dairy cattle breeding plans using multiple breeds"
Invited conference speaker
British Cattle Conference
Hosted by British Cattle Breeders Club
- January 26, 2005; Weston-under-Redcastle, Shropshire, England

2004

"Comparison of first-lactation Holstein, Normande-Holstein, Montbeliarde-Holstein, and Scandinavian-Holstein crossbred cows"
Educational programs for dairy producers
Hosted by Alpura Milk Cooperative
- November 29, 2004; Mexico City, Mexico
- November 29, 2004; Queretaro, Mexico
- December 1, 2004; Delicias, Mexico

"Crossbreeding: International experience"
Invited conference speaker
Irish National Dairy Cattle Conferences
- November 17, 2004; County Cork, Ireland
- November 18, 2004; County Cavan, Ireland

"Crossbreeding: An alternative in dairy cattle breeding?"
Invited conference speaker
International Dairy Cattle Conference, Saxonian Institute of Agriculture
February 4, 2004; Leipzig, Saxony, Germany

"Designing the cow of the future"
Departmental seminar speaker
University of Guelph
- January 15, 2004; Guelph, Ontario, Canada

2003

"Which traits and which breeds for dairy cattle in the future"
Departmental seminar speaker
Danish Agricultural Research Center
- May 29, 2003; Foulum, Denmark

"Optimum selection goals for dairy cattle internationally"
Invited speaker for Board of Directors
Svensk Avel A.I. Organization
- May 22, 2003; Skara, Sweden

"Which traits and which breeds for dairy cattle in the future"
Departmental seminar speaker
Swedish Agricultural University
- May 19, 2003; Uppsala, Sweden

"Comparison of Normande-Holstein crossbreds with pure Holsteins and Normande-Jersey crossbreds with pure Jerseys during first lactation"
Invited conference speaker
International Normande Conference (CINOR)
- February 25, 2003; Paris, France

2002

"The role of genetics in cow longevity"
Invited conference speaker
Midwest Dairy Herd Health Conference
- November 13, 2002; Madison, Wisconsin

"Reduced lifetimes of American dairy cows and practices to lengthen productive lifetimes"
Invited conference speaker
Invitational German Dairy Conference
- July 4, 2002; Brandenburg, Germany

2001

"Genetic technology - what's in it for producers?"
Educational seminar for dairy producers
World Dairy Expo
- October 4, 2001; Madison, Wisconsin

"Genetic diversity of food producing animals: Where has it gone? How much is left? A global perspective"
Invited symposium speaker
Joint Annual Meeting ADSA/ASAS
- July 24, 2001; Indianapolis, Indiana

"Longevity of Holstein cows selected for large versus small body size"
Invited conference speaker
CIGAL Mexican Dairy Conference
- July 12, 2001; Guadalajara, Mexico

"Are crossbreds useful to produce milk?"
Educational programs for dairy producers
National Association of Animal Breeders of the USA
- May 14, 2001; Tandil, Buenos Aires, Argentina
- May 17 and 18, 2001; Goiania, Goias, Brazil
- May 21, 2001; Cascavel, Parana, Brazil

"Are crossbreds useful to produce milk?"
Invited educational speaker
MercoLactea International Exposition on Milk Production
- May 10, 2001; San Francisco, Cordoba, Argentina

2000

"Performance of USA dairy genetics in different environments" and "Survival, longevity, and productive life of dairy cows"
Educational seminars for dairy producers
Hosted by the National Association of Animal Breeders of the USA
- March 13, 2000; Goiania, Brazil
- March 15, 2000; Uberaba, Brazil
- March 17, 2000; Porto Alegre, Brazil
- March 20, 2000; Buenos Aires, Argentina
- March 21, 2000; Santa Fe, Argentina

Bosley, K. M., L. B. Hansen, and B. J. Heins. Milk fatty acid profiles of Holstein, ProCROSS and Grazecross cows. Annual Meeting of the American Dairy Science Association, Ottawa, Ontario, Canada (Oral presentation #2626).

Pereira, G. M., B. J. Heins, and L. B. Hansen. Comparison of three-breed rotational crossbreds of Montbeliarde, Viking Red, and Holstein and Holstein cows fed 2 alternative diets for dry matter intake, production, and residual feed intake. Annual Meeting of the American Dairy Science Association, Kansas City, MO (Oral presentation #1120).

L.B Hansen. 2021. Capitalizing on breed differences and heterosis. Annual meeting of the American Dairy Science Association. 

L.B. Hansen. 2021. Experiences in engaging undergraduate students in dairy club activities online. Annual meeting of the American Dairy Science Association. 

Pereira, G. M., L. B. Hansen, and B. J. Heins. 2020. ProCROSS calves compared with Holstein calves for calving traits in two research herds. Virtual annual meeting of the American Dairy Science Association (Oral presentation #329).

Pereira, G. M., L. B. Hansen, and B. J. Heins. 2020 ProCROSS and Grazecross calves compared with Holstein calves for calving traits in a low-input dairy herd. Virtual annual meeting of the American Dairy Science Association (Oral presentation #330).

Houdek, E. S., B.J. Heins, A.R. Hazel, L.B. Hansen, and J.B. Cole. 2019. Alternative input parameters for Wood’s curve within best prediction used by USDA-AGIL for genetic evaluation of production traits in the United States. Annual Meeting of the American Dairy Science Association, Cincinnati, OH (Oral presentation #468).

Shonka-Martin, B. N., B. J. Heins, and L. B. Hansen. 2018. Dry matter intake, production, body condition score, body weight, and frame size of ProCROSS crossbred versus Holstein cows. Annual Meeting of the American Dairy Science Association, Knoxville, TN (Oral presentation #388).

Shonka-Martin, B. N., B. J. Heins, and L. B. Hansen. 2018. Feed efficiency and residual feed intake of ProCROSS crossbred versus Holstein cows. Annual Meeting of the American Dairy Science Association, Knoxville, TN (Oral presentation #389).

Hazel, A. R., B. J. Heins, and L. B. Hansen. 2018. Montbeliarde- and Viking Red-sired crossbred cows compared with Holstein cows for health treatment cost in high-performance dairies in Minnesota. Annual Meeting of the American Dairy Science Association, Knoxville, TN (Oral presentation #396).

Donnelly, M.R., A.R. Hazel, B.J. Heins, and L.B. Hansen. 2017. Genetic control of health treatment cost and the correlation of health treatment cost with production and conformation of first lactation Holstein cows. J. Dairy Sci. 100 (Suppl. 2):376 (Abstr.).

Houdek, E.S., A.R. Hazel, B.J. Heins, and L.B. Hansen. 2017. Calving ease, stillbirth, and gestation length of ProCROSS calves compared to pure Holsteins in two research herds. J. Dairy Sci. 100 (Suppl. 2):371 (Abstr.).

Shonka-Martin, B.N., B.J. Heins, and L.B. Hansen. 2017. A comparison of feed intake, production, body condition score, body weight, and frame size of ProCROSS crossbred versus Holstein cows during the first 150 days of first lactation. J. Dairy Sci. 100 (Suppl. 2):211 (Abstr.).

Donnelly, M.R., A.R. Hazel, B.J. Heins, and L.B. Hansen. 2015. Incidence of health treatments among pure Holsteins of 8 high-performance dairies in Minnesota. ADSA/ASAS Joint Annual Mtg., Orlando, FL (Poster presentation).

Hazel, A.R., B.J. Heins, and L.B. Hansen. 2015. Montbeliarde x Holstein and Viking Red x Holstein crossbreds compared with pure Holsteins during first lactation in eight high-performance dairies in Minnesota. I. Production. ADSA/ASAS Joint Annual Mtg., Orlando. FL (Oral presentation).

Hazel, A.R., B.J. Heins, and L.B. Hansen. 2015. Montbeliarde x Holstein and Viking Red x Holstein crossbreds compared with pure Holsteins during first lactation in eight high-performance dairies in Minnesota. II. Fertility, survival, and conformation. ADSA/ASAS Joint Annual Mtg., Orlando. FL (Oral presentation).

Heins, B.J., A.R. Hazel, and L.B. Hansen. 2015. Fertility and production of 3-breed and third- generation Holstein-sired crossbreds compared with pure Holstein cows in a seasonal pasture production system.  ADSA/ASAS Joint Annual Mtg., Orlando. FL (Oral presentation).

Hazel, A.R., B.J. Heins, and L.B. Hansen. 2013. Production traits of Montbeliarde-sired crossbreds compared to pure Holsteins in both high-input and low-input research herds. ADSA/ASAS Joint Meeting, Indianapolis, MN (Oral Presentation, Abstr. 518).

Hazel, A.R., B.J. Heins, and L.B. Hansen. 2013. Fertility, survival, and mortality of Montbeliarde-sired crossbreds compared to pure Holsteins in two research herds. ADSA/ASAS Joint Meeting, Indianapolis, MN (Oral Presentation, Abstr. 519).

Heins, B.J., L.B. Hansen, A.R. Hazel, J.C. Becker, and E.A. Bjorklund. 2012. Crossbreds of Holstein with Jersey and Montbeliarde compared to pure Holsteins for 305-day production and mastitis in a pasture management system. ADSA/ASAS Joint Meeting, Phoenix, AZ (Oral Presentation, Abstr. 232).

Mendonca, L.G.D., N.B. Litherland, M.C. Lucy, D.H. Keilser, L.B. Hansen, and R.C. Cheberl. 2012. Comparison of dry matter intake and somatotropic axis components of Holstein and Montbeliarde-sired crossbred dairy cows. ADSA/ASAS Joint Meeting, Phoenix, AZ (Oral Presentation, Abstr. M214).

Becker, J.C., B.J. Heins, G.D. Marx, and L.B. Hansen. 2010. Health treatment rates of Holstein cows selected for large versus small body size. ADSA/ASAS Joint Meeting, Denver, CO (Oral Presentation, Abstr. 930).

Hazel, A.R., L.B. Hansen, B.J. Heins, A.J. Seykora, D.G. Johnson, and J.G. Linn. 2010. Jersey-sired and Montbeliarde-sired crossbred heifers compared to pure Holstein heifers for survival, and fertility from birth to first parturition. ADSA/ASAS Joint Meeting, Denver, CO (Oral Presentation, Abstr. 434).

Heins, B.J. and L.B. Hansen. 2010. Death rates, survival rates to fifth lactation, and profitability of Normande, Montbeliarde, and Scandinavian Red crossbreds compared to pure Holsteins. ADSA/ASAS Joint Meeting, Denver, CO (Oral Presentation, Abstr. 436).

Heins, B.J. and L.B. Hansen. 2010. Productivity over five lactations of Normande, Montbeliarde, and Scandinavian Red crossbreds compared to pure Holsteins in commercial dairies in California. ADSA/ASAS Joint Meeting, Denver, CO (Oral Presentation, Abstr. 435).

Heins, B.J. and L.B. Hansen.2010. Survival, fertility, and production of Normande x Holstein, Montbeliarde x Holstein, and Scandinavian Red x Holstein crossbred cows. 9th World Congress on Genetics Applied to Livestock Production, Leipzig, Germany (Oral Presentation, Abstr. 843).

Blottner, S., M. Wensch-Dorendorf, H.H. Swalve, J. Guehne, B.J. Heins, and L.B. Hansen. 2009. Brown Swiss x Holstein crossbreds compared to pure Holsteins for body weight, backfat thickness, and udder measurements during the first two lactations. ADSA/ASAS Joint Meeting, Montreal, Quebec (Oral Presentation, Abstr. 747).

Blottner, S., M. Wensch-Dorendorf, H.H. Swalve, B.J. Heins, and L.B. Hansen. 2009. Brown Swiss x Holstein crossbreds compared to pure Holsteins for production, SCS, milking speed, days to first breeding, and days open. ADSA/ASAS Joint Meeting, Montreal, Quebec (Oral Presentation, Abstr. 746).

Hazel, A.R., B.J. Heins, L.B. Hansen, A.J. Seykora, D.G. Johnson, J.G. Linn, and J.E. Romano. 2009. Montbeliarde-sired crossbred cows compared to pure Holstein cows for body weight, body condition score, hip height, dry matter intake, and production during the first 150 days of first lactation. ADSA/ASAS Joint Meeting, Montreal, Quebec. Abstr. 743 (Oral Presentation).

Heins, B.J., L.B. Hansen, A.R. Hazel, A.J. Seykora, D.G. Johnson, and J.G. Linn. 2009. Calving traits, gestation length, and birth weight of Montbeliarde sires mated to Holstein or Jersey x Holstein crossbreds. ADSA/ASAS Joint Meeting, Montreal, Quebec. Abstr. 742 (Oral Presentation).

Heins, B.J., L.B. Hansen, A.R. Hazel, A.J. Seykora, D.G. Johnson, and J.G. Linn. 2009. Jersey x Holstein crossbred cows compared to pure Holstein cows for fertility and survival during the first three lactations. ADSA/ASAS Joint Meeting, Montreal, Quebec. Abstr. 738 (Oral Presentation).

Heins, B.J., L.B. Hansen, A.R. Hazel, A.J. Seykora, D.G. Johnson, and J.G. Linn. 2009. Jersey x Holstein crossbred cows compared to pure Holstein cows for production, SCS, and udder measurements during the first three lactations. ADSA/ASAS Joint Meeting, Montreal, Quebec. Abstr. 739 (Oral Presentation).

Hazel, A.R., B.J. Heins, L.B. Hansen, A.J. Seykora, D.G. Johnson, J.G. Linn, and J.E. Romano. 2008. Montbeliarde-sired crossbred cows compared to pure Holstein cows for production, SCS, days open, and body condition score during their first two lactations. J. Dairy Sci. 91(Suppl. 1):762 (Oral Presentation).

Heins, B.J., A.R. Hazel, L.B. Hansen, A.J. Seykora, A.R. Hazel, D.G. Johnson, J.G. Linn, and J.E. Romano. 2008. Jersey x Holstein crossbred cows compared to pure Holstein cows for production, SCS, days open, body condition score, and udder measurements during the first three lactations. J. Dairy Sci. 91(Suppl. 1):763 (Oral Presentation).

Heins, B.J., L.B. Hansen, A.J. Seykora, A.R. Hazel, A.G. Linn, and D.G. Johnson. 2007. Crossbreds of Jersey/Holstein compared to pure Holsteins for production, fertility, and udder traits during first lactation. J. Dairy Sci. 90(Suppl. 1):420.

Johnson, D.G., B.J. Heins, L.B. Hansen, A.J. Seykora, and J.G. Linn. 2007. Body weight and condition score of four dairy genetic groups in the summer or winter under low-input management. J. Dairy Sci. 90(Suppl. 1):540.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2006. Crossbreds of Normande/Holstein, Montbeliarde/Holstein, and Scandinavian Red/Holstein compared to pure Holsteins for 305-d production. J. Dairy Sci. 89(Suppl. 1):252.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2006. Crossbreds of Normande/Holstein, Montbeliarde/Holstein, and Scandinavian Red/Holstein compared to pure Holsteins for reproduction and survival. J. Dairy Sci. 89(Suppl. 1):249.

Heins, B.J., L.B. Hansen, A.J. Seykora, A.R. Hazel, J.G. Linn, and D.G. Johnson. 2006. Crossbreds of Jersey/Holstein compared to pure Holsteins for production, calving difficulty, stillbirths, and fertility. J. Dairy Sci. 89(Suppl. 1):251.

Heins, B.J., L.B. Hansen, A.J. Seykora, A.R. Hazel, J.G. Linn, M.L. Raeth-Knight, and W.P. Hansen. 2006. Crossbreds of Jersey/Holstein compared to pure Holsteins for body weight, dry matter intake, feed efficiency, and body condition score. J. Dairy Sci. 89(Suppl. 1):250.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2005. Crossbreds of Normande-Holstein, Montbeliarde-Holstein, and Scandinavian-Holstein compared to pure Holsteins for days to first breeding, first service conception rate, days open and survival. J. Dairy Sci. 88(Suppl. 1):97.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2005. Crossbreds of Normande-Holstein, Montbeliarde-Holstein, and Scandinavian-Holstein compared to pure Holsteins for dystocia and stillbirths. J. Dairy Sci. 88(Suppl. 1):96.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2005. Crossbreds of Normande-Holstein, Montbeliarde-Holstein, and Scandinavian-Holstein compared to pure Holsteins for production during the first 150 days of first lactation. J. Dairy Sci. 88(Suppl. 1):95.

Johnson, D., E. Ballinger, J. Linn, M. Rudstrom, L. Hansen, A. Seykora, and B. Heins. 2005. Evaluation of low input dairy farming systems by on-farm research, prototyping, and simulation modeling with emphasis on grazing management, seasonal calving, crossbreeding and outwintering. J. Anim. Sci. 98 (Suppl. 1), Midwest ADSA/ASAS meeting.

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.

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.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2004. Comparison of first-parity Holstein, Normande-Holstein crossbred, Montbeliarde-Holstein crossbred, and Scandinavian-Holstein crossbred cows for dystocia and stillbirths. J. Dairy Sci. 87(Suppl. 1):524.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2004. Crossbreds of Normande-Holstein, Montbeliarde-Holstein, and Scandinavian-Holstein compared to pure Holsteins for production and SCS during the first 150 days of production. J. Dairy Sci. 87(Suppl. 1):41.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2004. Minnesota 4-H Gopher Dairy Camp: A youth learning experience. J. Dairy Sci. 87(Suppl. 1):385.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2004. Normande-Holstein crossbred versus pure Holsteins for conception, days open, calving interval, and survival. J. Dairy Sci. 87(Suppl. 1):535.

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).

Seykora, A.J., B.J. Heins, L.B. Hansen, J.G. Linn, D.G. Johnson, and W.P. Hansen. 2004. Effect of Holstein females carrying Holstein versus Jersey sired calves on subsequent MEMilk, days open, and involuntary culling. J. Dairy Sci. 87(Suppl. 1):282. Abstr. 527.

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.

Hammell, E.E., M.L. Raeth-Knight, E. Ballinger, J.G. Linn, A.J. Seykora, and L.B. Hansen. 2003. Performance of Holstein and Jersey-Holstein crossbred heifer calves when using an intensive feeding program from birth to 84 days of age. J. Dairy Sci. 86(Suppl. 1):173.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2003. Comparison of first-parity Holstein, Jersey-Holstein crossbred, and Normande-Holstein crossbred cows for dystocia and stillbirths. J. Dairy Sci. 86(Suppl. 1):130.

Heins, B.J., L.B. Hansen, and A.J. Seykora. 2003. Comparison of Holstein, Jersey-Holstein crossbred, and Normande-Holstein crossbred first-parity cows for milk, fat, and protein production and SCS during the first 150 days of lactation. J. Dairy Sci. 86(Suppl. 1):39.

Heins, B.J., A.J. Seykora, L.B. Hansen, J.G. Linn, D.G. Johnson, and W.P. Hansen. 2003. Effect of mating Holstein females to Holstein versus jersey AI sires on fertility, dystocia, calf weight, and retained placenta. J. Dairy Sci. 86(Suppl. 1):130.

Luimes, P.H., E.H. Beaupre, 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):118.

Raeth-Knight, M.L., J.G. Linn, D.G. Johnson, L.B. Hansen, A.J. Seykora, B.J. Heins, and R.M. Templeton. 2003. Performance of Holstein and Jersey-Holstein crossbred heifer calves from birth to 84 days of age. J. Dairy Sci. 86(Suppl. 1):22.

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. J. Dairy Sci. 86(Suppl. 1): 238.

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.

Chrystal, M.A., Y. Da, L.B. Hansen, and A.J. Seykora. 2001. Accuracy of marker assisted selection using a mixed model method. J. Dairy Sci. 84(Suppl. 1):191.

Hansen, L.B. 2001. Dairy cattle contributions to the National Animal Germplasm Preservation program. J. Dairy Sci. 84(Suppl. 1):13.

Heins, B.J., L.B. Hansen, A.J. Seykora, and G.D. Marx. 2001. Calving disorders of Holstein cows selected for large versus small body size. J. Dairy Sci. 84(Suppl. 1):246.

Sonnek, E.N., L.B. Hansen, and A.J. Seykora. 2001. Evaluation of corrective mating programs for dairy cattle in the U.S. J. Dairy Sci. 84(Suppl. 1):24.

Chrystal, M.A., Y. Da, L.B. Hansen, and A.J. Seykora. 2000. A mixed model method for QTL detection and marker assisted selection. 27th International Conference in Animal Genetics (ISAG), Minneapolis, MN. July 22-26. p. 9.

Crooker, B.A., L.A. 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(Suppl. 1):205.

Heins, B.J., L.B. Hansen, A.J. Seykora, and G.D. Marx. 2000. Impact on body weight of divergent selection for body size. J. Dairy Sci. 83:(Suppl. 1):74.

Hansen, L.B. 1999. Consequences of selection for milk yield from a geneticist's viewpoint. J. Dairy Sci. 82(Suppl. 1):114.

Heins, B.J., L.B. Hansen, A.J. Seykora, and C.W. Wolfe. 1999. Comparison of Kinship Values calculated by the American Jersey Cattle Association and expected future in breeding calculated by USDA. J. Dairy Sci. 82(Suppl. 1):115.

Weber, W.J., L.H. Baumgard, Q. Shi, H. Chester-Jones, L.B. Hansen, S.A. Zinn, and B.A. Crooker. 1999. Effect of selection for milk yield on somatotropin (ST) response to growth hormone releasing factor (GRF) in multiparous Holstein cows during the periparturient period. J. Dairy Sci. 82(Suppl. 1):101.