Projects

IMPROVING GENETIC PREDICTIONS FOR DAIRY ANIMALS USING PHENOTYPIC AND GENOMIC INFORMATION Appropriated (D)   Accession Number: 412342

LARGE SCALE BOVINE SNP GENOTYPING FOR GENOMIC SELECTION AND HAPMAP DEVELOPMENT Reimbursable (R)   Accession Number: 410680

GENOME SIGNATURE OF ARTIFICIAL SELECTION AND GENOME-WIDE ASSOCIATION ANALYSIS IN HOLSTEIN COWS Reimbursable (R)   Accession Number: 412998

HIGH DENSITY BOVINE SNP GENOTYPING PANEL DEVELOPMENT Specific Cooperative Agreement (S)   Accession Number: 411122

ESTIMATING DAILY MILK, COMPONENT YIELD, AND SCS FROM INDIVIDUAL MILKING DATA Specific Cooperative Agreement (S)   Accession Number: 407694

PREDICT TRANSMITTING ABILITY FROM GENETIC LOCI USING DENSE MARKER GENOTYPES Specific Cooperative Agreement (S)   Accession Number: 411488

DEVELOPMENT AND ENHANCEMENT OF GENETIC EVALUATIONS FOR CALVING TRAITS Trust (T)   Accession Number: 409371

Publications

Genomic signatures of artificial selection in U.S. Holstein cows - (Abstract) - (20-Jun-08)

Technical Note: Adaptation of an Animal-Model Method for Approximation of Reliabilities to a Sire-Maternal Grandsire Model - (Peer Reviewed Journal)

Wiggans, G.R., Tsuruta, S., Misztal, I. 2008. Technical Note: Adaptation of an Animal-Model Method for Approximation of Reliabilities to a Sire-Maternal Grandsire Model. Journal of Dairy Science. 91(10):4058-4061.

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).

Reliability of genomic predictions for North American dairy bulls - (Abstract)

Van Raden, P.M., Van Tassell, C.P., Wiggans, G.R., Sonstegard, T.S., Schnabel, R.D., Schenkel, F. 2008. Reliability of genomic predictions for North American dairy bulls. Journal of Dairy Science. 91(E-Suppl. 1):305(abstr. 261).

Selection of single nucleotide polymorphisms and genotype quality for genomic prediction of genetic merit in dairy cattle - (Abstract)

Wiggans, G.R., Sonstegard, T.S., Van Raden, P.M., Matukumalli, L.K., Schnabel, R.D., Taylor, J.F., Schenkel, F.S., Van Tassell, C.P. 2008. Selection of single nucleotide polymorphisms and genotype quality for genomic prediction of genetic merit in dairy cattle. Journal of Dairy Science. 91(E-Suppl. 1):507(abstr. 524).

Construction and application of a bovine high-density SNP assay - (Abstract)

Van Tassell, C.P., Matukumalli, L.K., Taylor, C., Smith, T.P., Sonstegard, T.S., Schnabel, R., Silva, M.V., Wiggans, G.R., Liu, G., Moore, S., Taylor, J.F. 2007. Construction and application of a bovine high-density SNP assay. Joint Abstracts of the American Dairy Science and Society of Animal Science.

Multitrait evaluation for calving ease and stillbirth with separate genetic effects by parity - (Abstract)

Wiggans, G.R., Cole, J.B., Thornton, L.L. 2007. Multitrait evaluation for calving ease and stillbirth with separate genetic effects by parity. Journal of Dairy Science. 90(Suppl. 1):19(abstr. M49).

Harnessing Automatic Data Collection to Enhance Genetic Improvement Programs - (Abstract)

Wiggans, G.R. 2007. Harnessing Automatic Data Collection to Enhance Genetic Improvement Programs. Journal of Dairy Science. 90(Suppl. 1):377(abstr. 422).

STILLBIRTH (C0)VARIANCE COMPONENTS FOR A SIRE-MATERNAL GRANDSIRE THRESHOLD MODEL AND DEVELOPMENT OF A CALVING ABILITY INDEX FOR SIRE SELECTION - (Peer Reviewed Journal)

Cole, J.B., Wiggans, G.R., Van Raden, P.M., Miller, R.H. 2007. Stillbirth (co)variance components for a sire-maternal grandsire threshold model and development of a calving ability index for sire selection. Journal of Dairy Science. 90(5):2489-2496.

Genetic Evaluations for Mixed-Breed Populations - (Peer Reviewed Journal)

Van Raden, P.M., Tooker, M.E., Cole, J.B., Wiggans, G.R., Megonigal Jr, J.H. 2007. Genetic Evaluations for Mixed-Breed Populations. Journal of Dairy Science. 90(5):2434-2441.

MONITORING GOAT AND SHEEP MILK SOMATIC CELL COUNTS - (Peer Reviewed Journal)

Paape, M.J., Wiggans, G.R., Bannerman, D.D., Thomas, D.L., Sanders, A.H., Contreras, A., Moroni, P., Miller, R.H. 2007. Monitoring goat and sheep milk somatic cell counts. Small Ruminant Research. 68(1-2):114-125.

GENETIC EVALUATION OF STILLBIRTH IN UNITED STATES HOLSTEINS USING A SIRE-MATERNAL GRANDSIRE THRESHOLD MODEL - (Peer Reviewed Journal)

Cole, J.B., Wiggans, G.R., Van Raden, P.M. 2007. Genetic evaluation of stillbirth in United States Holsteins using a sire-maternal grandsire threshold model. Journal of Dairy Science. 90(5):2480-2488.

SHORT COMMUNICATION: GENETIC EVALUATION OF MILKING SPEED FOR BROWN SWISS DAIRY CATTLE IN THE UNITED STATES - (Peer Reviewed Journal)

Wiggans, G.R., Thornton, L.L., Neitzel, R., Gengler, N. 2007. Short Communication: Genetic evaluation of milking speed for Brown Swiss dairy cattle in the United States. Journal of Dairy Science. 90(2):1021-1023.

GENETIC PARAMETERS AND EVALUATION OF REAR LEGS (REAR VIEW) FOR BROWN SWISS AND GUERNSEYS - (Peer Reviewed Journal)

Wiggans, G.R., Thornton, L.L., Neitzel, R.R., Gengler, N. 2006. Genetic parameters and evaluation of rear legs (rear view) for Brown Swiss and Guernseys. Journal of Dairy Science. 89(12):4895-4900.

CHARACTERIZATION OF HOLSTEIN HEIFER FERTILITY IN THE UNITED STATES - (Peer Reviewed Journal)

Kuhn, M.T., Hutchison, J.L., Wiggans, G.R. 2006. Characterization of Holstein heifer fertility in the United States. Journal of Dairy Science. 89(12):4907-4920.

GENETIC CORRELATIONS BETWEEN FIRST AND LATER PARITY CALVING EASE IN A SIRE-MATERNAL GRANDSIRE MODEL - (Proceedings/Symposium)

Wiggans, G.R., Van Tassell, C.P., Cole, J.B., Thornton, L.L. 2006. Genetic correlations between first and later parity calving ease in a sire-maternal grandsire model. 8th World Congress of Genetics Applied in Livestock Production. Communication 01-92.

GENETIC EVALUATION OF STILLBIRTH IN UNITED STATES HOLSTEINS USING A SIRE-MATERNAL GRANDSIRE THRESHOLD MODEL - (Proceedings/Symposium)

Cole, J.B., Wiggans, G.R., Van Raden, P.M. 2006. Genetic evaluation of stillbirth in United States Holsteins using a sire-maternal grandsire threshold model. 8th World Congress of Genetics Applied in Livestock Production. Communication 01-28.

IMPACT ON CALVING EASE EVALUATIONS OF MODIFYING OR EXCLUDING DATA FROM HERD-YEARS WITH ABNORMAL DISTRIBUTIONS OF SCORES - (Proceedings/Symposium)

Van Tassell, C.P., Wiggans, G.R. 2006. Impact on calving ease evaluations of modifying or excluding data from herd-years with abnormal distributions of scores. 8th World Congress of Genetics Applied in Livestock Production. Communication 01-88.

GENETIC CALVING EASE STUDY ON CROSSBREDS - (Popular Publication)

Cole, J.B., Goodling, R.C., Wiggans, G.R., Van Raden, P.M. 2006. Genetic calving ease study on crossbreds. Jersey Journal. 53(3):83-84.

GENETIC EVALUATION OF MILKING SPEED FOR BROWN SWISS DAIRY CATTLE - (Abstract)

Wiggans, G.R., Thornton, L.L., Neitzel, R.R. 2006. Genetic evaluation of milking speed for Brown Swiss dairy cattle [abstract]. Journal of Dairy Science. 89(Suppl. 1):248(abstr. 259).

GENETIC PARAMETERS FOR REAR LEGS/REAR VIEW IN BROWN SWISS CATTLE - (Abstract)

Wiggans, G.R., Thornton, L.L., Neitzel, R.R. 2006. Genetic parameters for rear legs/rear view in Brown Swiss cattle. Journal of Dairy Science. 89(Suppl. 1):274(abstr. 341).

STILLBIRTH (CO)VARIANCE COMPONENTS FOR A SIRE-MATERNAL GRANDSIRE THRESHOLD MODEL - (Abstract)

Cole, J.B., Wiggans, G.R., Van Raden, P.M., Miller, R.H. 2006. Stillbirth (co)variance components for a sire-maternal grandsire threshold model [abstract]. Journal of Dairy Science. 89(Suppl. 1):273(abstr. 339).

GENETIC EVALUATIONS FOR MIXED BREED POPULATIONS - (Abstract)

Van Raden, P.M., Tooker, M.E., Cole, J.B., Wiggans, G.R., Megonigal Jr, J.H. 2006. Genetic evaluations for mixed breed populations [abstract]. Journal of Dairy Science. 89(Suppl. 1):98(abstr. 40).

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.

EFFECT OF YEAR, STAGE OF LACTATION, PARITY, BREED AND REGION ON GOAT MILK SOMATIC CELL COUNTS - (Proceedings/Symposium)

Paape, M.J., Wiggans, G.R., Bannerman, D.D., Thomas, D.L., Sanders, A., Contreas, A., Moroni, P., Miller, R.D. 2006. Effect of Tear, Stage of Lactation, Parity, Breed and Region on Goat Milk Somatic Cell Counts. National Mastitis Council (NMC) 45th Annual Meeting Proceedings. pp. 256-257.

ADJUSTMENT FOR HETEROGENEOUS COVARIANCE DUE TO HERD MILK YIELD BY TRANSFORMATION OF TEST-DAY RANDOM REGRESSIONS - (Peer Reviewed Journal)

Gengler, N., Wiggans, G.R., Gillon, A. 2005. Adjustment for heterogeneous covariance due to herd milk yield by transformation of test-day random regressions. Journal of Dairy Science. 88(8):2981-2990.

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.

REPRODUCTION DATA IN USDA DATABASE - (Abstract)

Wiggans, G.R. 2005. Reproduction data in USDA database [abstract]. Journal of Dairy Science. 88(Suppl. 1):354.

ACCOUNTING FOR PREGNANCY DIAGNOSIS IN PREDICTING DAYS OPEN - (Peer Reviewed Journal)

Wiggans, G.R., Goodling, Jr, R.C. 2005. Accounting for pregnancy diagnosis in predicting days open. Journal of Dairy Science. 88(5):1873-1877.

GENETIC EVALUATION OF CALVING EASE FOR BROWN SWISS AND JERSEY BULLS FROM PUREBRED AND CROSSBRED CALVINGS - (Peer Reviewed Journal)

Cole, J.B., Goodling Jr, R.C., Wiggans, G.R., Van Raden, P.M. 2005. Genetic evaluation of calving ease for Brown Swiss and Jersey bulls from purebred and crossbred calvings. Journal of Dairy Science. 88(4):1529-1539.

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.

ACCOUNTING FOR DIFFERENCES IN RATE OF MATURITY IN YIELD EVALUATIONS - (Abstract)

Wiggans, G.R., VanRaden, P.M. 2004. Accounting for differences in rate of maturity in yield evaluations [abstract]. Journal of Dairy Science. 87(Suppl. 1):412.

IMPACT ON CALVING EASE EVALUATIONS OF EXCLUDING HERDS WITH ABNORMAL DISTRIBUTION OF SCORES - (Abstract)

Van Tassell, C.P., Wiggans, G.R., Thornton, L.L.M. 2004. Impact on calving ease evaluations of excluding herds with abnormal distribution of scores [abstract]. Journal of Dairy Science. 87(Suppl. 1):84-85.

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.

ESTIMATED HETEROGENEITY OF PHENOTYPIC VARIANCE OF TEST-DAY YIELD WITH A STRUCTURAL VARIANCE MODEL - (Peer Reviewed Journal)

Gengler, N., Wiggans, G.R., Gillon, A. 2004. Estimated heterogeneity of phenotypic variance of test-day yield with a structural variance model. Journal of Dairy Science. 87(6):1908-1916.

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.

STANDARDIZATION OF LACTATION RECORDS FOR VARIANCE OF MENDELIAN SAMPLING TO REDUCE BIAS IN EVALUATIONS OF BULL DAMS - (Abstract) - (22-Jun-03)

TEST-DAY MILK LOSS ASSOCIATED WITH ELEVATED TEST-DAY SOMATIC CELL SCORE - (Abstract) - (22-Jun-03)

QUALITY OF DATA INCLUDED IN GENETIC EVALUATIONS FOR DAUGHTER PREGNANCY RATE - (Abstract) - (22-Jun-03)

IMPLEMENTATION OF A SIRE-MATERNAL GRANDSIRE MODEL FOR EVALUATION OF CALVING EASE IN THE US - (Peer Reviewed Journal)

Van Tassell, C.P., Wiggans, G.R., Misztal, I. 2003. Implementation of a sire-maternal grandsire model for evaluation of calving ease in the United States. Journal of Dairy Science. 86(10):3366-3373.

DETECTION AND ADJUSTMENT OF ABNORMAL TEST-DAY YIELDS - (Peer Reviewed Journal) - (19-Mar-03)

CALVING EASE (CO)VARIANCE COMPONENTS FOR A SIRE-MATERNAL GRANDSIRE EVALUATION MODEL - (Peer Reviewed Journal)

Wiggans, G.R., Misztal, I. Van Tassell, C.R., 2003Calving ease (Co)variance components for a sire-maternal grandsire threshold model. J Dairy Sci. 6(5):1845-8.

USDA DAIRY GOAT GENETIC EVALUATION PROGRAM - STATUS AND PLANS - (Proceedings/Symposium) - (18-Oct-02)

ADJUSTMENT FOR HETEROGENEOUS GENETIC AND NON-GENETIC (CO)VARIANCE STRUCTURES ON TEST-DAY MODELS USING A TRANSFORMATION ON RANDOM REGRESSION EFFECT REGRESSORS - (Proceedings/Symposium) - (26-May-02)

IMPROVEMENTS IN DYSTOCIA NATIONAL GENETIC EVALUATION SYSTEM AND DATA PROCESSING - (Abstract)

VAN TASSELL, C.P., WIGGANS, G.R., PHILPOT, J.C., MISZTAL, I. IMPROVEMENTS IN DYSTOCIA NATIONAL GENETIC EVALUATION SYSTEM AND DATA PROCESSING. JOURNAL OF DAIRY SCIENCE. vol. 85 (Suppl. 1), pp. 33.