Publications

Impact of Genetic Merit for Milk Somatic Cell Score of Sires and Maternal Grandsires on Herd Life of Their Daughters - (Peer Reviewed Journal)

Miller, R.H., Norman, H.D., Wright, J.R., Cole, J.B. 2008. Impact of Genetic Merit for Milk Somatic Cell Score of Sires and Maternal Grandsires on Herd Life of Their Daughters. Journal of Dairy Science. 92(5):2224-2228.

Alternatives for Examining Daughter Performance of Progeny-Test Bulls between Official Evaluations - (Peer Reviewed Journal)

Norman, H.D., Wright, J.R., Weigel, K.A. 2009. Alternatives for Examining Daughter Performance of Progeny-Test Bulls between Official Evaluations. Journal of Dairy Science. 92(5):2348-2355.

Genetic and Environmental Factors That Impact Gestation Length in Dairy Cattle - (Peer Reviewed Journal)

Norman, H.D., Wright, J.R., Kuhn, M.T., Hubbard, S.M., Cole, J.B., Van Raden, P.M. 2009. Genetic and Environmental Factors That Impact Gestation Length in Dairy Cattle. Journal of Dairy Science. 92(5):2259-2269.

A National Sire Fertility Index - (Proceedings/Symposium)

Norman, H.D., Hutchison, J.L., Wright, J.R., Hubbard, S.M. 2008. A national sire fertility index. Dairy Cattle Reproduction Council Proceedings. Omaha, NE, Nov. 7-8, pp. 45-52.

Death Losses for Lactating Cows in Herds Enrolled in Dairy Herd Improvement Test Plans - (Peer Reviewed Journal)

Miller, R.H., Kuhn, M.T., Norman, H.D., Wright, J.R. 2008. Death Losses for Lactating Cows in Herds Enrolled in Dairy Herd Improvement Test Plans. Journal of Dairy Science. 91(9):3710-3715.

Sire conception rate: New national AI bull fertility evaluation - (Government Publication)

Norman, H.D., Hutchison, J.L., Wright, J.R. 2008. Sire conception rate: New national AI bull fertility evaluation. AIPL Research Reports. SRC1(7-08).

Retrofitting genetic-economic indexes to demonstrate responses to selection across 2 generations of Holsteins - (Proceedings/Symposium)

Norman, H.D., Wright, J.R., Miller, R.H. 2009. Retrofitting genetic-economic indexes to demonstrate responses to selection across 2 generations of Holsteins. International Committee on Animal Recording (ICAR). ICAR Tech Ser. 13:181¿185. 2009.

Alternatives for evaluating daughter performance of progeny-test bulls between official evaluations - (Abstract)

Norman, H.D., Wright, J.R., Weigel, K.A. 2008. Alternatives for evaluating daughter performance of progeny-test bulls between official evaluations. Journal of Dairy Science. 91(E-Suppl. 1):105 (abstr. 10).

Reproductive trends of dairy herds in the United States - (Abstract)

Norman, H.D., Wright, J.R., Hubbard, S.M., Kuhn, M.T., Miller, R.H. 2008. Reproductive trends of dairy herds in the United States. Journal of Dairy Science. 91(E-Suppl. 1):7(abstr. T18).

Impact of selection for increased daughter fertility on productive life and culling for reproduction - (Abstract)

Norman, H.D., Wright, J.R., Miller, R.H. 2008. Impact of selection for increased daughter fertility on productive life and culling for reproduction. Journal of Dairy Science. 91(E-Suppl. 1):7(abstr. T19).

Impact of selection for decreased somatic cell score on productive life and culling for mastitis - (Abstract)

Norman, H.D., Miller, R.H., Wright, J.R. 2008. Impact of selection for decreased somatic cell score on productive life and culling for mastitis. Journal of Dairy Science. 91(E-Suppl. 1):106(abstr. 13).

Factors affecting abortion frequency in dairy herd improvement herds in the United States - (Abstract)

Miller, R.H., Kuhn, M.T., Norman, H.D., Wright, J.R. 2008. Factors affecting abortion frequency in dairy herd improvement herds in the United States. Journal of Dairy Science. 91(E-Suppl. 1):8(abstr. T21).

Genetic Selection for Reproduction: Current Reproductive Status of the National Herd; Application of Selection Indexes for Dairy Producers - (Proceedings/Symposium)

Norman, H.D., Wright, J.R., Hubbard, S.M., Kuhn, M.T., Miller, R.H. 2007. Genetic Selection for Reproduction: Current Reproductive Status of the National Herd; Application of Selection Indexes for Dairy Producers. Dairy Cattle Reproduction Council Proceedings. Denver, CO, Nov. 2-3, pp. 69-78.

Consistency of Maturity Rate for Milk Yield Across Countries and Generations - (Peer Reviewed Journal)

Norman, H.D., Wright, J.R., Powell, R.L., Van Raden, P.M., Miglior, F., De Jong, G. Consistency of Maturity Rate for Milk Yield Across Countries and Generations. Journal of Dairy Science. 90(8):3937-3944.

Effect of temperature and humidity on gestation length - (Abstract)

Norman, H.D., Wright, J.R., Cole, J.B. 2007. Effect of temperature and humidity on gestation length. Journal of Dairy Science. 90(Suppl. 1):16(abstr. M38).

Relationship of gestation length to stillbirth - (Abstract)

Powell, R.L., Norman, H.D., Wright, J.R. 2007. Relationship of gestation length to stillbirth. Journal of Dairy Science. 90(Suppl. 1):16(abstr. M39).

Genetic and environmental factors that affect gestation length - (Abstract)

Norman, H.D., Wright, J.R., Kuhn, M.T., Hubbard, S.M., Cole, J.B. 2007. Genetic and environmental factors that affect gestation length. Journal of Dairy Science. 90(Suppl. 1):264(abstr. T73).

Effect of service sire and cow sire on gestation length - (Abstract)

Norman, H.D., Wright, J.R., Van Raden, P.M., Cole, J.B. 2007. Effect of service sire and cow sire on gestation length. Journal of Dairy Science. 90(Suppl. 1):194(abstr. 230).

Factors affecting death rate of lactating cows in Dairy Herd Improvement herds - (Abstract)

Miller, R.H., Norman, H.D., Kuhn, M.T., Wright, J.R. 2007. Factors affecting death rate of lactating cows in Dairy Herd Improvement herds. Journal of Dairy Science. 90(Suppl. 1):11(abstr. M24).

Genetics can improve fertility by 15 percent - (Popular Publication)

Norman, H.D., Wright, J.R. 2007. Genetics can improve fertility by 15 percent. Hoard's Dairyman. 152(9):350.

Is there a need for different genetics in dairy grazing systems? - (Proceedings/Symposium)

Norman, H.D., Wright, J.R., Powell, R.L. 2006. Is there a need for different genetics in dairy grazing systems?. Proceeding of 6th Mid-Atlantic Dairy Grazing Conference, October 31 - November 1, Goldsboro, North Carolina, p. 1-5.

Selection on Yield and Fitness Traits When Culling Holsteins During the First Three Lactations - (Peer Reviewed Journal)

Norman, H.D., Hutchison, J.L., Wright, J.R., Kuhn, M.T., Lawlor, T.J. 2007. Selection on yield and fitness traits when culling Holsteins during the first three lactations. Journal of Dairy Science. 90(2):1008-1020.

Trait Selection When Culling U.S. Holsteins - (Proceedings/Symposium)

Norman, H.D., Hutchison, J.L., Wright, J.R., Kuhn, M.T. 2006. Trait selection when culling U.S. Holsteins. 8th World Congress of Genetics Applied in Livestock Production. Communication 01-43.

Survival Rates and Productive Herd Life of Dairy Cattle in the United States - (Peer Reviewed Journal)

Hare, E., Norman, H.D., Wright, J.R. 2006. Survival rates and productive herd life of dairy cattle in the United States. Journal of Dairy Science. 89(9):3713-3720.

Genetic Differences Between Maturity Rates of Daughters of Holstein Bulls in the Netherlands and United States - (Abstract)

Norman, H.D., Wright, J.R., Powell, R.L., Van Raden, P.M., De Jong, G. 2006. Genetic differences between maturity rates of daughters of Holstein bulls in the Netherlands and United States [abstract]. Journal of Dairy Science. 89(Suppl. 1):16-17(abstr. M29).

Factors That Impact Longevity of Holsteins in the United States - (Abstract)

Norman, H.D., Wright, J.R. 2006. Factors that impact longevity of Holsteins in the United States [abstract]. Journal of Dairy Science. 89(Suppl. 1):276(abstr. 348).

Domestic Versus Imported Artificial-Insemination Semen for Holstein Graziers in the United States - (Abstract)

Norman, H.D., Wright, J.R., Powell, R.L. 2006. Domestic versus imported artificial-insemination semen for Holstein graziers in the United States [abstract]. Journal of Dairy Science. 89(Suppl. 1):136(abstr. 157).

Accounting for Heterogeneous Variances in Multi-Trait Evaluation of Jersey Type Traits - (Peer Reviewed Journal)

Gengler, N., Wiggans, G.R., Thornton, L.L., Wright, J.R., Druet, T. 2006. Accounting for heterogeneous variances in multi-trait evaluation of Jersey type traits. Journal of Dairy Science. 89(8):3143-3151.

Trends in Calving Ages and Calving Intervals for Dairy Cattle Breeds in the United States - (Peer Reviewed Journal)

Hare, E., Norman, H.D., Wright, J.R. 2006. Trends in calving ages and calving intervals for dairy cattle breeds in the United States. Journal of Dairy Science. 89(1):365-370.

Impact of Maturity Rate of Daughters on Genetic Ranking of Holstein Bulls - (Peer Reviewed Journal)

Norman, H.D., Wright, J.R., Powell, R.L., Van Raden, P.M. 2005. Impact of maturity rate of daughters on genetic ranking of Holstein bulls. Journal of Dairy Science. 88(9):3337-3345.

Accounting for Heterogeneous Variances in Multi-Trait Evaluation of Jersey Type Traits - (Abstract)

Gengler, N., Wiggans, G.R., Thornton, L.L., Wright, J.R., Druet, T. 2005. Accounting for heterogeneous variances in multi-trait evaluation of Jersey type traits [abstract]. Journal of Dairy Science. 88(Suppl. 1):11.

Genetic Alternatives for Dairy Producers Who Practise Grazing - (Proceedings/Symposium)

Norman, H.D., Wright, J.R., Powell, R.L. 2005. Genetic alternatives for dairy producers who practise grazing. In: Proceedings of Satellite Workshop of the XXth International Grassland Congress, July 3-6, 2005, Cork, Ireland. p. 176.

Comparison of Maturity Rate for Bull Daughters in the United States and Canada - (Abstract)

Norman, H.D., Wright, J.R., Powell, R.L., Van Raden, P.M., Miglior, F. 2005. Comparison of maturity rate for bull daughters in the United States and Canada [abstract]. Journal of Dairy Science. 88(Suppl. 1):10-11.

Selection Intensity for Yield Traits, Somatic Cell Score, and Days Open When Culling Dairy Cows - (Abstract)

Norman, H.D., Hutchison, J.L., Kuhn, M.T., Wright, J.R., Hare, E. 2005. Selection intensity for yield traits, somatic cell score, and days open when culling dairy cows [abstract]. Journal of Dairy Science. 88(Suppl. 1):140.

Effectiveness of National and Regional Sire Evaluations in Predicting Future Daughter Milk Yield - (Peer Reviewed Journal)

Norman, H.D., Van Raden, P.M., Powell, R.L., Wright, J.R., Verboort, W.R. 2005. Effectiveness of national and regional sire evaluations in predicting future daughter milk yield. Journal of Dairy Science. 88(2):812-826.

Duration of Herd Participation in Dairy Herd Improvement Milk Recording in the United States - (Abstract)

Hare, E.M., Norman, H.D., and Wright, J.R. In: Duration of herd participation in Dairy Herd Improvement milk recording in the United States [abstract]. Proceedings of Beltsville Agricultural Research Center Poster Day 2004, April 29, 2004, Beltsville, MD. Abstract 39.

Duration of Herd Participation in Dairy Herd Improvement Milk Recording in the United States - (Peer Reviewed Journal)

Hare, E.M., Norman, H.D., Wright, J.R., Van Raden, P.M. 2004. Duration of herd participation in Dairy Herd Improvement milk recording in the United States. Journal of Dairy Science. 87(8):2743-2747.

Type Trait (Co)variance Components for Five Dairy Breeds - (Peer Reviewed Journal)

Wiggans, G.R., Gengler, N., Wright, J.R. 2004. Type trait (co)variance components for five dairy breeds. Journal of Dairy Science.87(7):2324-2330.

Merit of Obtaining Genetic Evaluations of Milk Yield for Each Parity on Holstein Bulls - (Abstract)

Norman, H.D., Wright, J.R., Powell, R.L., VanRaden, P.M. 2004. Merit of obtaining genetic evaluations of milk yield for each parity on Holstein bulls [abstract]. Journal of Dairy Science. 87(Suppl. 1):2.

Genetic Relationships of Milk Yield for Different Parities Between Bulls and Their Sons - (Abstract)

Norman, H.D., Powell, R.L., Wright, J.R., VanRaden, P.M. 2004. Genetic relationships of milk yield for different parities between bulls and their sons [abstract]. Journal of Dairy Science. 87(Suppl. 1):413.

Relationships of Test-Day Somatic Cell Scores with Test-Day and Lactation Milk Yields - (Peer Reviewed Journal)

Miller, R.H., Norman, H.D., Wiggans, G.R., Wright, J.R. 2004. Relationships of test-day somatic cell scores with test-day and lactation milk yields. Journal of Dairy Science. 87(7):2299-2306.

Performance of Holsteins That Originated from Embryo Transfer Or Multiparous Births - (Abstract) - (22-Jun-03)

Characteristics of Genetic Evaluations for Daughter Fertility in Relation to Other Fitness Traits - (Abstract) - (22-Jun-03)

Test-Day Milk Loss Associated with Elevated Test-Day Somatic Cell Score - (Abstract) - (22-Jun-03)

Performance of Holstein Clones in the United States - (Peer Reviewed Journal)

Norman, H.D., Lawlor, T.J., Wright, J.R., Powell, R.L. 2004. Performance of Holstein clones in the United States. Journal of Dairy Science. 87(3):729-738.