Projects

Improving Genetic Predictions for Dairy Animals Using Phenotypic and Genomic Information Appropriated (D)   Accession Number: 412342

The National Dairy Genetic Evaluation Program Memorandum of Understanding (M)   Accession Number: 409237

Use of Single Nucleotides Polymorphisms to Verify Parentage Specific Cooperative Agreement (S)   Accession Number: 410018

Comparison of Health, Fitness, and Fertility Traits for Holsteins, Jerseys, and Reciprocal Crosses Specific Cooperative Agreement (S)   Accession Number: 413388

Performance and Profitability of F1 Norwegian Red X Holstein Cattle As Compared with Pure Holsteins on Commercial Dairy Farms Specific Cooperative Agreement (S)   Accession Number: 411967

Use of Single Nucleotides Polymorphisms to Verify Parentage Specific Cooperative Agreement (S)   Accession Number: 410040

Predict Transmitting Ability from Genetic Loci Using Dense Marker Genotypes Specific Cooperative Agreement (S)   Accession Number: 411488

Genetic and Environmental Parameters for Yield Traits Across Varying Herd Sizes, Production Levels and Lactation Number Specific Cooperative Agreement (S)   Accession Number: 408094

Development and Enhancement of Genetic Evaluations for Calving Traits Trust (T)   Accession Number: 409371

Publications

State and National Standardized Lactation Averages by Breed for Cows Calving in 2007 - (Government Publication)

Norman, H.D., Ross Jr, F.A. 2009. State and National Standardized Lactation Averages by Breed for Cows Calving in 2007. AIPL Research Reports. K2-07 (2-09).

Somatic cell counts of milk from Dairy Herd Improvement herds during 2008 - (Government Publication)

Norman, H.D., Miller, R.H., Ross Jr, F.A. 2009. Somatic cell counts of milk from Dairy Herd Improvement herds during 2008. AIPL Research Reports. SCC10 (2-09).

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.

Characterization and usage of sexed semen from US field data - (Abstract)

Hutchison, J.L., Norman, H.D. 2009. Characterization and usage of sexed semen from US field data. Theriogenology 71(1):48.

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.

State and National Standardized Lactation Averages by Breed for Cows Calving in 2006 - (Government Publication)

Norman, H.D., Thornton, L.L., Wiggans, G.R. 2008. State and National Standardized Lactation Averages by Breed for Cows Calving in 2006. AIPL Research Reports. K2-06(3-08).

Modeling Nuisance Variables for Prediction of Service Sire Fertility - (Peer Reviewed Journal)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2008. Modeling Nuisance Variables for Prediction of Service Sire Fertility. Journal of Dairy Science. 91(7):2823-2835.

Investigation of country bias in international genetic evaluations using full brother information - (Peer Reviewed Journal)

Powell, R.L., Sanders, A.H., Norman, H.D. 2008. Investigation of country bias in international genetic evaluations using full-brother information. Journal of Dairy Science. 91(7):2885-2892.

Somatic Cell Counts of Milk from Dairy Herd Improvement Herds during 2007 - (Government Publication)

Miller, R.H., Norman, H.D., Thornton, L.L. 2008. Somatic Cell Counts of Milk from Dairy Herd Improvement Herds during 2007. AIPL Research Reports. SCC9(3-08).

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 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).

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).

Breed Composition of the United States Dairy Cattle Herd - (Abstract)

Powell, R.L., Norman, H.D., Hutchison, J.L. 2008. Breed Composition of the United States Dairy Cattle Herd. Journal of Dairy Science. 91(E-Suppl. 1):7(abstr. T17).

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).

Modeling nuisance variables for phenotypic evaluation of bull fertility - (Abstract)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2008. Modeling nuisance variables for phenotypic evaluation of bull fertility. Journal of Dairy Science. 91(E-Suppl. 1):7¿8 (abstr. T20).

Derivation of factors to estimate daily yield from single milkings for Holsteins milked two or three times daily - (Abstract)

Schutz, M.M., Bewley, J.M., Norman, H.D. 2008. Derivation of factors to estimate daily yield from single milkings for Holsteins milked two or three times daily. Journal of Dairy Science. 91(E-Suppl. 1):106¿107(abstr. 14).

Short Communication: Variance estimates among herds stratified by individual herd heritability - (Peer Reviewed Journal)

Dechow, C.D., Norman, H.D., Pelensky, C.A. 2008. Short Communication: Variance estimates among herds stratified by individual herd heritability. Journal of Dairy Science. 91(4):1648-1651.

Relationship Between Individual Herd-Heritability Estimates and Sire Misidentification Rate - (Peer Reviewed Journal)

Dechow, C.D., Norman, H.D., Zwald, N.R., Cowan, C.M., Meland, O.M. 2008. Relationship between individual herd-heritability estimates and sire misidentification rate. Journal of Dairy Science. 91(4):1640-1647.

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.

Short Communication: Genotype by Environment Interaction Due to Heat Stress - (Peer Reviewed Journal)

Bohmanova, J., Misztal, I., Tsuruta, S., Norman, H.D., Lawlor, T.J. 2008. Short Communication: Genotype by Environment Interaction Due to Heat Stress. Journal of Dairy Science. 91(2):840-846.

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.

Aim for 55-Day Dry Period for Top Production - (Popular Publication)

Hutchison, J.L., Kuhn, M.T., Norman, H.D. 2007. Aim for 55-Day Dry Period for Top Production. Jersey Journal. 54(6):73-74.

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 herd-heritability with sire misidentification and entry into a proven sire lineup - (Abstract)

Dechow, C.D., Norman, H.D., Zwald, N.R. 2007. Relationship of herd-heritability with sire misidentification and entry into a proven sire lineup. Journal of Dairy Science. 90(Suppl. 1):262(abstr. T66).

Effects of dam's dry period length on calf - (Abstract)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2007. Effects of dam's dry period length on calf. Journal of Dairy Science. 90(Suppl. 1):329¿¿330(abstr. T277).

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.

State and National Standardized Lactation Averages by Breed for Cows Calving in 2005 - (Government Publication)

Norman, H.D., Thornton, L.L. 2007. State and National Standardized Lactation Averages by Breed for Cows Calving in 2005. AIPL Research Reports. K2-05 (2-07).

Somatic Cell Counts of Milk from Dairy Herd Improvement Herds during 2006 - (Government Publication)

Miller, R.H., Norman, H.D., Thornton, L.L. 2007. Somatic Cell Counts of Milk from Dairy Herd Improvement Herds during 2006. AIPL Research Reports. SCC8 (2-07).

Dry Period Length in US Jerseys: Characterization and Effects on Performance - (Peer Reviewed Journal)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2007. Dry Period Length in US Jerseys: Characterization and Effects on Performance. Journal of Dairy Science. 90(4):2069-2081.

Voluntary Waiting Period and Adoption of Synchronized Breeding in Dairy Herd Improvement Herds - (Peer Reviewed Journal)

Miller, R.H., Norman, H.D., Kuhn, M.T., Clay, J.S., Hutchison, J.L. 2007. Voluntary waiting period and adoption of synchronized breeding in Dairy Herd Improvement herds. Journal of Dairy Science. 90(3):1594-1606.

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.

Within-Herd Heritability Estimated with Daughter-Parent Regression for Yield and Somatic Cell Score - (Peer Reviewed Journal)

Dechow, C.D., Norman, H.D. 2007. Within-herd heritability estimated with daughter-parent regression for yield and somatic cell score. Journal of Dairy Science. 90(1):482-492.

State and National Standardized Lactation Averages by Breed for Cows Calving in 2004 - (Government Publication)

Norman, H.D., Thornton, L.L. 2006. State and national standardized lactation averages by breed for cows calving in 2004. AIPL Research Report K2-04 (3-06).

Dry Period Length Affects Components, Breeding, and Scc - (Popular Publication)

Hutchison, J.L., Kuhn, M.T., Norman, H.D. 2006. Dry period length affects components, breeding, and SCC. Hoard's Dairyman. 151(12):484.

Let's Look Again at Evaluating Dry Period Length - (Popular Publication)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2006. Let's look again at evaluating dry period length. Hoard's Dairyman. 151(11):434-435.

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.

Issues in Genetic Evaluation of Dairy Cattle for Heat Tolerance - (Proceedings/Symposium)

Misztal, I., Bohmanova, J., Freitas, S., Tsuruta, S., Norman, H.D., Lawlor, T.J. 2006. Issues in genetic evaluation of dairy cattle for heat tolerance. World Congress of Genetics Applied in Livestock Production. Communication 01-12.

How Dry Periods Affect Lifetime Production - (Popular Publication)

Hutchison, J.L., Kuhn, M.T., Norman, H.D. 2006. How dry periods affect lifetime production. Hoard's Dairyman. 151(13):526-527.

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.

Somatic Cell Counts of Milk from Dairy Herd Improvement Herds During 2005 - (Government Publication)

Miller, R.H., Norman, H.D. 2006. Somatic cell counts of milk from Dairy Herd Improvement herds during 2005. AIPL Research Report SCC7(3-06).

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).

A Comparison of Sire and Animal Model Genetic Parameter Estimates from Herds with High and Low Within-Herd Heritabilities - (Abstract)

Dechow, C.C., Norman, H.D. 2006. A comparison of sire and animal model genetic parameter estimates from herds with high and low within-herd heritabilities [abstract]. Journal of Dairy Science. 89(Suppl. 1):96(abstr. 34).

Effects of Accounting for Heat Stress on Genetic Evaluation of Us Holsteins for Milk by a Test Day Model - (Abstract)

Bohmanova, J., Misztal, I., Tsuruta, S., Norman, H.D., Lawlor, T.J. 2006. Effects of accounting for heat stress on genetic evaluation of US Holsteins for milk by a test day model [abstract]. Journal of Dairy Science. 89(Suppl. 1):137-138(abstr. 163).

Culling: Nomenclature, Definitions, and Recommendations - (Peer Reviewed Journal)

Fetrow, J., Nordlund, K.V., Norman, H.D. 2006. Invited review: Culling: nomenclature, definitions, and recommendations. Journal of Dairy Science. 89(6):1896-1905.

Dry Period Length to Maximize Production Across Adjacent Lactations and Lifetime Production - (Peer Reviewed Journal)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2006. Dry period length to maximize production across adjacent lactations and lifetime production. Journal of Dairy Science. 89(5):1713-1722.

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.

Effects of Length of Dry Period on Yields of Milk Fat and Protein, Fertility and Milk Somatic Cell Score in the Subsequent Lactation of Dairy Cows - (Peer Reviewed Journal)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2006. Effects of length of dry period on yields of milk fat and protein, fertility and milk somatic cell score in the subsequent lactation of dairy cows. Journal of Dairy Research. 73(2):154-162.

Culling: Nomenclature, Definitions and Some Observations - (Abstract)

Fetrow, J., Nordlund, K., Norman, D. 2005. Culling: nomenclature, definitions and some observations [abstract]. Journal of Dairy Science. 88(Suppl. 1):122.

Impact of Estimated Genetic Correlations on International Evaluations to Predict Milk Traits - (Peer Reviewed Journal)

Powell, R.L., Sanders, A.H., Norman, H.D. 2005. Impact of estimated genetic correlations on international evaluations to predict milk traits. Journal of Dairy Science. 88(10):3679-3687.

National Genetic Evaluation of Milk Yield for Heat Tolerance of United States Holsteins - (Proceedings/Symposium)

Bohmanova, J., Misztal, I., Tsuruta, S., Norman, H.D., Lawlor, T.J. 2005. National genetic evaluation of milk yield for heat tolerance of United States Holsteins. International Bull Evaluation Service Bulletin 33:160-162.

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.

Minimum Days Dry to Maximize Milk Yield in Subsequent Lactation - (Peer Reviewed Journal)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2005. Minimum days dry to maximize milk yield in subsequent lactation. Animal Research. 54:351-367.

Accuracy and Stability of National and International Somatic Cell Score Evaluations - (Peer Reviewed Journal)

Powell, R.L., Sanders, A.H., Norman, H.D. 2005. Accuracy and stability of national and international somatic cell score evaluations. Journal of Dairy Science. 88(7):2624-2631.

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.

Somatic Cell Counts of Milk from Dairy Herd Improvement Herds During 2004 - (Government Publication)

Miller, R.H., Norman, H.D., Sanders, A.H. 2005. Somatic cell counts of milk from dairy herd improvement herds during 2004. AIPL Research Report SCC6 (3-05). Available: http://aipl.arsusda.gov/publish/dhi/current/sccrpt.htm

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.

Historical Examination of Culling of Dairy Cows from Herds in the United States - (Abstract)

Norman, H.D., Hare, E. 2005. Historical examination of culling of dairy cows from herds in the United States [abstract]. Journal of Dairy Science. 88(Suppl. 1):122.

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.

Assessment of Voluntary Waiting Period and Frequency of Estrus Synchronization among Herds - (Abstract)

Miller, R.H., Norman, H.D., Kuhn, M.T., Clay, J.S. 2005. Assessment of voluntary waiting period and frequency of estrus synchronization among herds [abstract]. Journal of Dairy Science. 88(Suppl. 1):301.

Disposal Reporting and Disposition of Culled Cows by Parity and in Herds of Different Sizes - (Abstract)

Sanders, A.H., Norman, H.D. 2005. Disposal reporting and disposition of culled cows by parity and in herds of different sizes [abstract]. Journal of Dairy Science. 88(Suppl. 1):219-220.

Effectiveness of Estimating Individual Herd Heritabilities Using Regression Techniques - (Abstract)

Dechow, C., Norman, H.D. 2005. Effectiveness of estimating individual herd heritabilities using regression techniques [abstract]. Journal of Dairy Science. 88(Suppl. 1):11.

Country Bias in International Dairy Bull Evaluations - (Abstract)

Powell, R.L., Sanders, A.H., Norman, H.D. 2005. Country bias in international dairy bull evaluations [abstract]. Journal of Dairy Science. 88(Suppl. 1):228-229.

Test-Day Model That Accounts for Heat Stress of Holsteins in the United States - (Abstract)

Bohmanova, J., Misztal, I., Tsuruta, S., Norman, H.D. 2005. Test-day model that accounts for heat stress of Holsteins in the United States [abstract]. Journal of Dairy Science. 88(Suppl. 1):353-354.

Major Advances in Genetic Evaluation Techniques - (Peer Reviewed Journal)

Powell, R.L., Norman, H.D. 2006. Major advances in genetic evaluation techniques. Journal of Dairy Science. 89(4):1337-1348.

Characterization of Days Dry for United States Holsteins - (Peer Reviewed Journal)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2005. Characterization of days dry for United States Holsteins. Journal of Dairy Science. 88(3):1147-1155.

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.

Optimum Genetic Choices for Dairy Producers using Grazing Practices - (Abstract)

Norman, H.D., Van Tassell, C.P., VanRaden, P.M. 2004. Optimum genetic choices for dairy producers using grazing practices [abstract]. Proceedings of 2004 Conference of the American Forage and Grassland Council 13:20, 219.

Performance of Dairy Cattle Clones and Evaluation of Their Milk Composition - (Review Article)

Norman, H.D., Walsh, M.K. 2004. Performance of dairy cattle clones and evaluation of their milk composition. Cloning and Stem Cells. 6(2):157-164.

Genetic Improvement of Dairy Cattle Health - (Abstract)

Cole, J.B., Miller, P.D., Norman, H.D. 2004. Genetic improvement of dairy cattle health [abstract]. In: Proceedings of 12th International Conference on Production Diseases in Farm Animals, July 19-22, 2004, East Lansing, Michigan. p. 78.

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.

Stability of Evaluations for Active Ai Bulls - (Peer Reviewed Journal)

Powell, R.L., Sanders, A.H., Norman, H.D. 2004. Stability of genetic evaluations for active artificial insemination bulls. Journal of Dairy Science. 87(8):2614-2620.

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.

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.

Accuracy and Stability of National and International Somatic Cell Score Evaluations - (Abstract)

Powell, R.L., Sanders, A.H., Norman, H.D. 2004. Accuracy and stability of national and international somatic cell score evaluations [abstract]. Journal of Dairy Science. 87(Suppl. 1):87-88.

Minimum Dry Period Length to Maximize Performance - (Abstract)

Kuhn, M.T., Hutchison, J.L., Norman, H.D. 2004. Minimum dry period length to maximize performance [abstract]. Journal of Dairy Science. 87(Suppl. 1):56.

Impact of Participation in Somatic Cell Count Testing on Herd Average Somatic Cell Score - (Abstract)

Norman, H.D., Sanders, A.H., Miller, R.H., Powell, R.L. 2004. Impact of participation in somatic cell count testing on herd average somatic cell score [abstract]. Journal of Dairy Science. 87(Suppl. 1):280-281.

Accuracy of Foreign Dairy Bull Evaluations in Predicting Us Evaluations for Yield - (Peer Reviewed Journal)

Powell, R.L., Sanders, A.H., Norman, H.D. 2004. Accuracy of foreign dairy bull evaluations in predicting United States evaluations for yield. Journal of Dairy Science. 87(8):2621-2626.

Somatic Cell Counts of Milk from Dairy Herd Improvement Herds During 2003 - (Government Publication)

Miller, R.H., Norman, H.D., Sanders, A.H. 2004. Somatic cell counts of milk from Dairy Herd Improvement herds during 2003. Animal Improvement Programs Laboratory Research Report SCC5(2-04). Available: http://aipl.arsusda.gov/publish/dhi/current/sccrpt.htm

Development of a National Genetic Evaluation for Cow Fertility - (Peer Reviewed Journal)

Van Raden, P.M., Sanders, A.H., Tooker, M.E., Miller, R.H., Norman, H.D., Kuhn, M.T., Wiggans, G.R. 2004. Development of a national genetic evaluation for cow fertility. Journal of Dairy Science. 87(7):2285-2292.

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.

Dairy Cattle: Breeding and Genetics - (Book/Chapter)

Norman, H.D., Hubbard, S.M. 2004. Dairy cattle: breeding and genetics. Encyclopedia of Animal Science. 1(1):264-267. Pond, W.G., and Bell, A.W. (ed.). Marcel Dekker, Inc., Academic Press, New York, NY.

Accuracy of Foreign Dairy Bull Evaluations in Predicting Us Evaluations for Yield - (Proceedings/Symposium)

Powell, R.L., Sanders, A.H., Norman, H.D. 2003. Accuracy of foreign dairy bull evaluations in predicting US evaluations for yield. International Bull Evaluation Service Bulletin 31:171-174.

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)

Using the Internet for Distribution of Dairy Genetic Evaluations and Research Information to the Dairy Industry - (Abstract) - (22-Jun-03)

Accuracy of Foreign Dairy Bull Evaluations in Predicting Us Evaluations for Yield - (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.

Progeny Testing and Selection Intensity for Holstein Bulls in Different Countries - (Peer Reviewed Journal)

Powell, R.L., Norman, H.D., Sanders, A.H. 2003. Progeny testing and selection intensity for Holstein bulls in different countries. Journal of Dairy Science. 86(10):3386-3393.

Somatic Cell Counts of Milk from Dairy Herd Improvement Herds During 2002 - (Government Publication) - (06-Mar-03)

Daughter Pregnancy Rate Evaluation of Cow Fertility - (Government Publication) - (10-Dec-02)

Somatic Cell Counts of Milk from Dairy Herd Improvement Herds During 2001 - (Government Publication) - (01-Apr-02)