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United States Department of Agriculture

Agricultural Research Service

KREG A. LEYMASTER

Research Geneticist (Animals)


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Association of TMEM154 missense mutations with lentiviral infection and virus subtypes in sheep - (Proceedings) - (02-Apr-14)
SNPs for parentage testing and traceability in globally diverse breeds of sheep - (Peer Reviewed Journal)
Heaton, M.P., Leymaster, K.A., Kalbfleisch, T.S., Kijas, J.W., Clarke, S.M., McEwan, J., Maddox, J.F., Basnayake, V., Petrik, D.T., Simpson, B., Smith, T.P., Chitko-McKown, C.G. 2014. SNPs for parentage testing and traceability in globally diverse breeds of sheep. PLoS One. 9(4):e94851. DOI: 10.1371/JOURNAL.PONE.0094851.
SNPs for parentage testing and traceability in globally diverse breeds of sheep - (Abstract Only)
Heaton, M.P., Leymaster, K.A., Kalbfleisch, T.S., Kijas, J.W., Clarke, S.M., McEwan, J., Maddox, J.F., Basnayake, V., Petrik, D.T., Simpson, B., Smith, T.P., Chitko McKown, C.G. 2014. SNPs for parentage testing and traceability in globally diverse breeds of sheep [Abstract]. Proceedings Plant and Animal Genome XXII Conference, January 11-15, 2014, San Diego, CA. Poster P614.
Effects of TMEM154 haplotypes 1 and 3 on susceptibility to ovine progressive pneumonia virus following natural exposure in sheep - (Peer Reviewed Journal)
Leymaster, K.A., Chitko-McKown, C.G., Clawson, M.L., Harhay, G.P., Heaton, M.P. 2013. Effects of TMEM154 haplotypes 1 and 3 on susceptibility to ovine progressive pneumonia virus following natural exposure in sheep. Journal of Animal Science. 91(11):5114-5121.
Small ruminant lentivirus genetic subgroups associate with sheep TMEM154 genotypes - (Peer Reviewed Journal)
Sider, L.H., Heaton, M.P., Chitko-Mckown, C.G., Harhay, G.P., Smith, T.P.L., Leymaster, K.A., Laegreid, W.W., and Clawson, M.L. 2013. Small ruminant lentivirus genetic subgroups associate with sheep TMEM154 genotypes. Veterinary Research. 44:64. DOI: 10.1186/1297-9716-44-64.
The change in differing leukocyte populations during vaccination to bovine respiratory disease and their correlations with lung scores, health records, and average daily gain - (Peer Reviewed Journal)
Leach, R.J., Chitko-McKown, C.G., Bennett, G.L., Jones, S.A., Kachman, S.D., Keele, J.W., Leymaster, K.A., Thallman, R.M., Kuehn, L.A. 2013. The change in differing leukocyte populations during vaccination to bovine respiratory disease and their correlations with lung scores, health records, and average daily gain. Journal of Animal Science. 91(8):3564-3573.
Rhodotorula minuta fungemia in a ewe lamb - (Peer Reviewed Journal)
Chitko-McKown, C.G., Leymaster, K.A., Heaton, M.P., Griffin, D.D., Veatch, J.K., Jones, S., Clawson, M.L. 2013. Rhodotorula minuta fungemia in a ewe lamb. Transboundary and Emerging Diseases. doi:10.1111/tbed.12062. [Epub ahead of print].
Genetic testing for TMEM154 mutations associated with lentivirus susceptibility in sheep - (Peer Reviewed Journal)
Heaton, M.P., Kalbfleisch, T.S., Petrik, D.T., Simpson, B., Kijas, J.W., Clawson, M.L., Chitko MckKown, C.G., Harhay, G.P., Leymaster, K.A. 2013. Genetic testing for TMEM154 mutations associated with lentivirus susceptibility in sheep. PLoS One. 8(2):e55490. doi:10.1371/journal.pone.0055490.
Genetic testing for TMEM154 mutations associated with lentivirus susceptibility in sheep - (Abstract Only)
Heaton, M.P., Kalbfleisch, T., Petrik, D.T., Simpson, B., Kijas, J., Clawson, M.L., Chitko-McKown, C.G., Leymaster, K.A., Harhay, G.P. 2013. Genetic testing for TMEM154 mutations associated with lentivirus susceptibility in sheep [abstract]. International Plant & Animal Genome XXI Conference. No. P0625.
New concepts in OPP selection and eradication - (Other) - (24-Sep-12)
Use of information to reduce the risk of OPP infection - (Other) - (24-Sep-12)
Genome-Wide association identifies multiple genomic regions associated with susceptibility to and control of ovine lentivirus Reprint Icon - (Peer Reviewed Journal)
White, S.N., Mousel, M.R., Herrmann-Hoesing, L.M., Reynolds, J.O., Leymaster, K.A., Neibergs, H.L., Lewis, G.S., Knowles Jr, D.P. 2012. Genome-Wide association identifies multiple genomic regions associated with susceptibility to and control of ovine lentivirus. PLoSOne 7(10):e47829.
Phylogenetic clades of ovine progressive pneumonia virus (OPPV) associate with sheep TMEM154 genotypes - (Abstract Only)
Sider, L.H., Clawson, M.L., Heaton, M.P., Chitko Mckown, C.G., Harhay, G.P., Smith, T.P.L., Leymaster, K.A. 2012. Phylogenetic clades of ovine progressive pneumonia virus (OPPV) associate with sheep TMEM154 genotypes. The 58th Genomic Congress, September 11-14, 2012. Foz de Iguacu, Brazil. Poster No. GM001.
Effects of breed of sire on carcass composition and sensory traits of lamb Reprint Icon - (Peer Reviewed Journal)
Shackelford, S.D., Leymaster, K.A., Wheeler, T.L., Koohmaraie, M. 2012. Effects of breed of sire on carcass composition and sensory traits of lamb. Journal of Animal Science. 90:4131-4139.
Evaluation of Columbia, USMARC-Composite, Suffolk, and Texel rams as terminal sires in an extensive rangeland production system: I. Ewe productivity and crossbred lamb survival and preweaning growth - (Peer Reviewed Journal)
Leeds, T.D., Notter, D.R., Leymaster, K.A., Mousel, M.R., Lewis, G.S. 2012. Evaluation of Columbia, USMARC-Composite, Suffolk, and Texel rams as terminal sires in an extensive rangeland production system: I. Ewe productivity and crossbred lamb survival and preweaning growth. Journal of Animal Science. DOI:10.2527/jas.2011-4640.
Litter size influences lamb weight and ovarian reserve but not reproductive tract development or expression of genes involved in early follicular development - (Abstract Only) - (13-Apr-12)
Reduced OPP susceptibility in naturally exposed lambs with homozygous TMEM154 K35 genotypes - (Abstract Only)
Chitko Mckown, C.G., Leymaster, K.A., Heaton, M.P., Clawson, M.L., Harhay, G.P. 2012. Reduced OPP susceptibility in naturally exposed lambs with homozygous TMEM154 K35 genotypes [abstract]. Immunology 2012. The 99th Annual Meeting of the American Association for Immunology, May 4-8, 2012, Boston, Massachusetts. Page 275. Abstract No. 170.3. Poster No. P1246.
Reduced lentivirus susceptibility in sheep with TMEM154 mutations - (Peer Reviewed Journal)
Heaton, M.P., Clawson, M.L., Chitko-Mckown, C.G., Leymaster, K.A., Smith, T.P.L., Harhay, G.P., White, S.N., Herrmann-Hoesing, L.M., Mousel, M.R., Lewis, G.S., Kalbfleisch, T.S., Keen, J.E., Laegreid, W.W. 2012. Reduced lentivirus susceptibility in sheep with TMEM154 mutations. PLoS Genetics. 8(1): e1002467. DOI: 10.1371/journal.pgen.1002467.
A case report describing detection of Rhodoturola minuta fungemia in an ewe lamb - (Abstract Only)
Chitko Mckown, C.G., Leymaster, K.A., Heaton, M.P., Griffin, D.D., Veatch, J.K., Jones, S.A., Clawson, M.L. 2011. A case report describing detection of Rhodoturola minuta fungemia in an ewe lamb [Abstract]. Proceeding of the 2011 Conference of Research Workers in Animal Diseases, December 4-6, 2011, Chicago, Illinois. p. 95.
Validation and fine mapping of a QTL for ovulation rate on swine chromosome 3 Reprint Icon - (Peer Reviewed Journal)
Mousel, M.R., Leymaster, K.A., Christenson, R.K., Nonneman, D.J., Rohrer, G.A. 2012. Validation and fine mapping of a QTL for ovulation rate on swine chromosome 3. Animal Genetics. 43(2):220-224.
Ovine Reference Materials and Assays for Prion Genetic Testing Reprint Icon - (Peer Reviewed Journal)
Heaton, M.P., Leymaster, K.A., Kalbfleisch, T.S., Freking, B.A., Smith, T.P., Clawson, M.L., Laegreid, W.W. 2010. Ovine Reference Materials and Assays for Prion Genetic Testing. BioMed Central (BMC) Veterinary Research [serial online]. 6:23. Available: http://www.biomedcentral.com/1746-6148/6/23.
Ovine Reference Materials and Assays for Prion Genetic Testing - (Abstract Only)
Heaton, M.P., Leymaster, K.A., Kalbfleisch, T.S., Freking, B.A., Smith, T.P., Clawson, M.L., Laegreid, W.W. 2009. Ovine Reference Materials and Assays for Prion Genetic Testing [abstract]. Plant and Animal Genomes XVIII Conference. Abstract No. P577. Available: http://www.intl-pag.org/18/abstracts/
Associations Between Haemonchus contortus Infection in Lambs and Blood Traits - (Abstract Only)
Chitko-McKown, C.G., Leymaster, K.A. 2009. Associations Between Haemonchus contortus Infection in Lambs and Blood Traits. Proceeding of the 90th Conference of Research Workers in Animal Diseases, December 5-8, 2009, Chicago, Illinois. Poster No. 105P. p. 112.
Does breed of ram affect ewe and lamb productivity? - (Popular Publication)
Notter, D.R., Leeds, T.D., Mousel, M.R., Leymaster, K.A., Lewis, G.S. 2009.Does breed of ram affect ewe and lamb productivity?. The Shepherd. March Issue. pp. 8-10.
Extreme muscle development in sheep heterozygous for both myostatin and callipyge mutations Reprint Icon - (Abstract Only)
Smith, T.P., Freking, B.A., Shackelford, S.D., King, D.A., Wheeler, T.L., Leymaster, K.A. 2009. Extreme muscle development in sheep heterozygous for both myostatin and callipyge mutations. Plant and Animal Genome Conference Proceedings. Jan. 10-14, 2009. San Diego, CA. Abstract W084.
Evaluation of Columbia, USMARC-Composite, Suffolk, and Texel rams as terminal sires: Effects of ram breed on ewe productivity and F1 lamb survival and growth. - (Proceedings)
Leeds, T.D., Mousel, M.R., Notter, D.R., Leymaster, K.A., Lewis, G.S. 2008. Evaluation of Columbia, USMARC-Composite, Suffolk, and Texel rams as terminal sires: Effects of ram breed on ewe productivity and F1 lamb survival and growth. Western Section of Animal Science Proceedings. 59:65-68.
A paradigm for virus-host coevolution: Sequential counter-adaptations between endogenous and exogenous retroviruses Reprint Icon - (Peer Reviewed Journal)
Arnaud, F., Caporale, M., Varela, M., Biek, R., Chessa, B., Alberti, A., Golder, M., Mura, M., Zhang, Y., Yu, L., Pereira, F., De Martini, J.C., Leymaster, K.A., Spencer, T.E., Palmarini, M. 2007. A paradigm for virus-host coevolution: Sequential counter-adaptations between endogenous and exogenous retroviruses. PLoS Pathogens Vol. 3(11):e170 doi:10.1371/journal.ppat.0030170.
Number of Fetuses and Conceptus Growth Throughout Gestation in Lines of Pigs Selected for Either Ovulation Rate or Uterine Capacity Reprint Icon - (Peer Reviewed Journal)
Freking, B.A., Leymaster, K.A., Vallet, J.L., Christenson, R. 2007. Number of fetuses and conceptus growth throughout gestation in lines of pigs selected for either ovulation rate or uterine capacity. Journal of Animal Science. 85(9):2093-2103.
Associations of Candidate SNP on Age, Leptin Concentration, Backfat, and Body Weight at Puberty in Gilts Reprint Icon - (Abstract Only)
Kuehn, L.A., Nonneman, D.J., Jiang, Z., Leymaster, K.A., Wise, T.H. 2007. Associations of candidate SNP on age, leptin concentration, backfat, and body weight at puberty in gilts [abstract]. Journal of Animal Science. 85(Suppl. 2):63. Abstract #50.
Evaluating the Feasibility of Fitting Haplotype Effects as Random: Variance Component Estimation - (Abstract Only)
Kuehn, L.A., Thallman, R.M., Leymaster, K.A. 2007. Evaluating the feasibility of fitting haplotype effects as random: Variance component estimation [abstract]. Journal of Animal Science. 85(Supplement 1):669-670. Abstract #945.
Evaluation of Dorper, Dorset, Katahdin, and Rambouillet crossbred ewes in high- and low-input production systems Reprint Icon - (Abstract Only)
Leymaster, K.A. 2007. Evaluation of Dorper, Dorset, Katahdin, and Rambouillet crossbred ewes in high- and low-input production systems [abstract]. Journal of Animal Science. 85 (Supplement 1):458-459. Abstract #671.
Detection of Single Nucleotide Polymorphisms Associated with Ultrasonic Backfat Depth in a Segregating Meishan x White Composite Population - (Peer Reviewed Journal)
Kuehn, L.A., Rohrer, G.A., Nonneman, D.J., Thallman, R.M., Leymaster, K.A. 2007. Detection of single nucleotide polymorphisms associated with ultrasonic backfat depth in a segregating Meishan x White Composite population. Journal of Animal Science. 85:1111-1119.
Breed Effects on Growth, Carcass and Meat Quality Traits of Sheep - (Proceedings)
Leymaster, K.A., Shackelford, S.D., Wheeler, T.L., Koohmaraie, M. 2006. Breed effects on growth, carcass and meat quality traits of sheep. Proceedings of the British Society of Animal Science, New Developments in Sheepmeat Quality. p. 43-47.
Detection of Single Nucleotide Polymorphisms on Porcine Chromosome 7 Associated with Ultrasonic Backfat in a Segregating Meishan X White Cross Population Using a Model with Polygenic Effects Reprint Icon - (Abstract Only)
Kuehn, L.A., Rohrer, G.A., Nonneman, D.J., Thallman, R.M., Leymaster, K.A. 2006. Detection of single nucleotide polymorphisms on porcine chromosome 7 associated with ultrasonic backfat in a segregating Meishan x White Cross population using a model with polygenic effects. (Abstract) Animal Genetics International Conference Proceedings. p. 104. Abstract #E353.
Direct Breed Effects on Growth, Carcass, and Meat Quality Traits of Sheep - (Proceedings)
Leymaster, K.A., Shackelford, S.D., Wheeler, T.L., Koohmaraie, M. 2006. Direct breed effects on growth, carcass, and meat quality traits of sheep. Proceedings of the 8th World Congress of Genetics Applied to Livestock Production. CD-ROM Communication No. 32-12. Belo Horizonte, Brazil.
Callipyge Mutation Affects Gene Expression in Cis: a Potential Role for Chromatin Structure - (Peer Reviewed Journal)
Murphy, S.K., Nolan, C.M., Huang, Z., Kucera, K.S., Freking, B.A., Smith, T.P.L., Leymaster, K.A., Weidman, J.R., Jirtle, R.L. 2006. Callipyge mutation affects gene expression in cis: A potential role for chromatin structure. Genome Research. 16:340-346.
What We Have Learned About Prenatal Physiology in the Pig from Uterine Crowding Experiments Reprint Icon - (Abstract Only)
Vallet, J., Freking, B., Kayser, J.P., Christenson, R., Leymaster, K. 2006. What we have learned about prenatal physiology in the pig from uterine crowding experiments [abstract]. Journal of Animal Science. 84 (Supplement 2):71-72. (Abstract #95)
Evaluation of Associations Between Prion Haplotypes and Growth, Carcass, and Meat Quality Traits in a Dorset X Romanov Sheep Population - (Peer Reviewed Journal)
Isler, B.J., Freking, B.A., Thallman, R.M., Heaton, M.P., Leymaster, K.A. 2006. Evaluation of associations between prion haplotypes and growth, carcass, and meat quality traits in a Dorset x Romanov sheep population. Journal of Animal Science. 84:783-788.
A Freely-Available Set of Reference Dnas for Genotyping the Major Scrapie Susceptibility Alleles in Sheep - (Abstract Only)
Heaton, M.P., Leymaster, K.A., Clawson, M.L., Freking, B.A., Laegreid, W.W. 2006. A freely-available set of reference DNAs for genotyping the major scrapie susceptibility alleles in sheep [abstract]. Plant and Animal Genome Conference Proceedings. p. 239.
Evaluation of the Ovine Callipyge Locus: Iv. Genotypic Effects on Reproductive Traits - (Peer Reviewed Journal)
Freking, B.A., Leymaster, K.A. 2006. Evaluation of the ovine callipyge locus: IV. Genotypic effects on reproductive traits. Journal of Animal Science. 84:311-316.
Use of Hair Breeds in Integrated Systems Reprint Icon - (Proceedings)
Leymaster, K.A. 2006. Use of hair breeds in integrated systems. Proceedings Hair Sheep Workshop. Virginia State University, Petersburg, VA, June 20-21, 2005. Available: http://www.sheepandgoat.com/HairSheepWorkshop/index.html.
Evaluation of Wool and Hair Breeds for Growth, Carcass, and Meat Quality Traits - (Proceedings)
Leymaster, K.A., Shackelford, S.D., Wheeler, T.L., Koohmaraie, M. 2005. Evaluation of wool and hair breeds for growth, carcass, and meat quality traits. In: Proceedings of the North American Hair Sheep Symposium, October 6-8, 2005, San Angelo, TX. 2005 CDROM.
Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale Breeds of Sheep: V. Reproduction of F1 Ewes in Spring Mating Seasons - (Peer Reviewed Journal)
Casas, E., Freking, B.A., Leymaster, K.A. 2005. Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep: V. Reproduction of F1 ewes in spring mating seasons. Journal of Animal Science. 83:2743-2751.
Experimental Results to Take to the Bank - (Popular Publication)
Leymaster, K.A., Freking, B.A., Casas, E. 2005. Experimental results to take to the bank. The Shepherd. 50(9):11-14.
Allelic Variation in the Secreted Folate Binding Protein Gene Is Associated with Uterine Capacity in Swine - (Peer Reviewed Journal)
Vallet, J.L., Freking, B.A., Leymaster, K.A., Christenson, R. 2005. Allelic variation in the secreted folate binding protein gene is associated with uterine capacity in swine. Journal of Animal Science. 83(8):1860-1867.
Fine Mapping of a Qtl in a Swine Population Selected for Ovulation Rate - (Abstract Only)
Mousel, M.R., Rohrer, G.A., Leymaster, K.A., Christenson, R. 2005. Fine mapping of a QTL in a swine population selected for ovulation rate. Journal of Animal Science 83(Suppl. 1):231-232.
Estimates of Genetic Parameters for Feed Intake, Feeding Behavior, and Daily Gain in Composite Ram Lambs - (Peer Reviewed Journal)
Cammack, K.M., Leymaster, K.A., Jenkins, T.G., Nielsen, M.K. 2005. Estimates of genetic parameters for feed intake, feeding behavior, and daily gain in composite ram lambs. Journal of Animal Science. 83:777-785.
Allelic Variation in the Erythropoietin Receptor Gene Is Associated with Uterine Capacity and Litter Size in Swine - (Peer Reviewed Journal)
Vallet, J.L., Freking, B.A., Leymaster, K.A., Christenson, R.K. 2005. Allelic variation in the erythropoietin receptor gene is associated with uterine capacity and litter size in swine. Animal Genetics. 36(2):97-103.
A 12 Bp Insertion/deletion (In/del) Polymorphism in the Secreted Folate Binding Protein (Sfbp) Gene Is Associated with Uterine Capacity and Ovulation Rate in Swine - (Abstract Only)
Vallet, J.L., Freking, B.A., Leymaster, K.A., Christenson, R.K. 2005. A 12 bp insertion/deletion (in/del) polymorphism in the secreted folate binding protein (sFBP) gene is associated with uterine capacity and ovulation rate in swine [abstract]. Journal of Animal Science. 83 (Supplement 2):87.
Effects of Prion Haplotype on Growth and Carcass Traits in Sheep - (Peer Reviewed Journal)
Isler, B.J., Freking, B.A., Heaton, M.P., Thallman, R.M., Leymaster, K.A. 2005. Effects of prion haplotype on growth and carcass traits in sheep [abstract]. Midwestern Section of the American Society of Animal Science. 83(Suppl. 2):44-45
Prenatal Mortality Throughout Gestation in Lines of Pigs Selected for Either Ovulation Rate Or Uterine Capacity - (Abstract Only)
Freking, B.A., Leymaster, K.A., Christenson, R., Vallet, J.L. 2005. Prenatal mortality throughout gestation in lines of pigs selected for either ovulation rate or uterine capacity [abstract]. Midwestern Section of the American Society of Animal Science. 83(Suppl. 2):41. Paper No. 28.
Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale Breeds of Sheep: Iv. Survival, Growth, and Carcass Traits of F1 Lambs - (Peer Reviewed Journal)
Freking, B.A., Leymaster, K.A. 2004. Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep: IV. Survival, growth, and carcass traits of F1 lambs. Journal of Animal Science. 82:3144-3153.
Competing Risks Analysis of Lamb Mortality in a Terminal Sire Composite Population - (Peer Reviewed Journal)
Southey, B.R., Rodriguez-Zas, S.L., Leymaster, K.A. 2004. Competing risks analysis of lamb mortality in a terminal sire composite population. Journal of Animal Science. 82:2892-2899.
Validation of Qtls in a Swine Population Selected for Ovulation Rate - (Abstract Only)
Mousel, M.R., Rohrer, G.A., Leymaster, K.A., Christenson, R.K. 2004. Validation of QTLs in a swine population selected for ovulation rate. Journal of Animal Science 82(Supplement 1):452.
Meat Quality and the Callipyge Gene, Consumer Acceptance and Final Product - (Proceedings)
Freking, B.A., Smith, T.P., Leymaster, K.A. 2004. Meat quality and the callipyge gene, consumer acceptance and final product. In: Proceedings of the 7th World Sheep and Wool Congress 2004, July 17-24, 2004, Quebec, Canada. p. 92-102.
Evaluation of Dorset, Finnsheep, Romanov, Texel and Montadale Breeds of Sheep: Iii. Wool Characteristics of F1 Ewes - (Peer Reviewed Journal)
Lupton, C.J., Freking, B.A., Leymaster, K.A. 2004. Evaluation of Dorset, Finnsheep, Romanov, Texel and Montadale breeds of sheep: III. Wool characteristics of F1 ewes. Journal of Animal Science. 82:2293-2300.
Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale Breeds of Sheep: Reproduction of F1 Ewes in Spring Mating Seasons - (Abstract Only)
Leymaster, K.A., Casas, E., Freking, B.A. 2004. Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep: Reproduction of F1 ewes in spring mating seasons. [abstract] Journal of Animal Science Supplement. 82(Suppl. 1):390. Paper No. 647.
Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale Breeds of Sheep: Ii. Reproduction of F1 Ewes in Fall Mating Seasons - (Peer Reviewed Journal)
Casas, E., Freking, B.A., Leymaster, K.A. 2004. Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep: II. Reproduction of F1 ewes in fall mating seasons. Journal Of Animal Science. 82:1280-1289.
Prion Gene Sequence Variation Within Diverse Groups of U.S. Sheep, Beef Cattle, and Deer - (Abstract Only)
HEATON, M.P., LEYMASTER, K.A., FREKING, B.A., HAWK, D.A., KEELE, J.W., LAEGREID, W.W. PRION GENE SEQUENCE VARIATION WITHIN DIVERSE GROUPS OF U.S. SHEEP, BEEF CATTLE, AND DEER. PLANT AND ANIMAL GENOME CONFERENCE PROCEEDINGS. 2004. ABSTRACT NO. P311.
Accurate Determination of Prnp Haplotypes in U.S. Sheep - (Abstract Only)
HEATON, M.P., LEYMASTER, K.A., FREKING, B.A., LAEGREID, W.W. ACCURATE DETERMINATION OF PRNP HAPLOTYPES IN U.S. SHEEP. PLANT AND ANIMAL GENOME CONFERENCE PROCEEDINGS. 2004. ABSTRACT NO. P312.
Relationship Between Litter Birth Weight and Litter Size in Six Breeds of Sheep - (Peer Reviewed Journal)
FREETLY, H.C., LEYMASTER, K.A. RELATIONSHIP BETWEEN LITTER BIRTH WEIGHT AND LITTER SIZE IN SIX BREEDS OF SHEEP. JOURNAL OF ANIMAL SCIENCE. 2004. v. 82. p. 612-618.
The Callipyge Mutation for Sheep Muscular Hypertrophy - Genetics, Physiology and Meat Quality - (Other)
Freking, B.A., Smith, T.P., Leymaster, K.A. 2004. The callipyge mutation for sheep muscular hypertrophy - genetics, physiology and meat quality. In: M.F.W. te Pas, M.E. Everts and H.P. Haagsman, editors. Muscle Development in Livestock. CAB International, United Kingdom. Chapter 15. p. 317-342.
Effects of Breed of Sire on Carcass Composition and Sensory Traits of Lamb - (Abstract Only)
Shackelford, S.D., Leymaster, K.A., Wheeler, T.L., Koohmaraie, M. 2003. Effects of breed of sire on carcass composition and sensory traits of lamb [abstract]. American Meat Science Association Conference Reciprocal Proceedings. 56:112.
Prion Gene Sequence Variation Within Diverse Groups of U.S. Sheep, Beef Cattle, and Deer - (Peer Reviewed Journal)
HEATON, M.P., LEYMASTER, K.A., FREKING, B.A., HAWK, D.A., SMITH, T.P., KEELE, J.W., SNELLING, W.M., FOX, J.M., CHITKO MCKOWN, C.G., LAEGREID, W.W. PRION GENE SEQUENCE VARIATION WITHIN DIVERSE GROUPS OF U.S. SHEEP, BEEF CATTLE, AND DEER. MAMMALIAN GENOME. 2003. V. 14. P. 765-777.
Competing Risks Analysis of Lamb Mortality - (Abstract Only)
SOUTHEY, B.R., RODRIGUEZ-ZAS, S.L., LEYMASTER, K.A. COMPETING RISKS ANALYSIS OF LAMB MORTALITY. JOURNAL OF ANIMAL SCIENCE SUPPLEMENT. 2003. v. 81(SUPPL. 1) p. 68. Abstract No. 268.
Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale Breeds of Sheep: Productivity of F1 Ewes in Fall Breeding Seasons - (Proceedings)
CASAS, E., FREKING, B.A., LEYMASTER, K.A. EVALUATION OF DORSET, FINNSHEEP, ROMANOV, TEXEL, AND MONTADALE BREEDS OF SHEEP: PRODUCTIVITY OF F1 EWES IN FALL BREEDING SEASONS. JOURNAL OF ANIMAL SCIENCE SUPPLEMENT. Vol. 81(Suppl. 1):67. 2003.
Effects of Selection for Ovulation Rate Or Uterine Capacity on Number and Weight of Pigs at Birth and Weaning - (Abstract Only)
CHRISTENSON, R.K., LEYMASTER, K.A. EFFECTS OF SELECTION FOR OVULATION RATE OR UTERINE CAPACITY ON NUMBER AND WEIGHT OF PIGS AT BIRTH AND WEANING. BIOLOGY OF REPRODUCTION ABSTRACTS. 2003. v. 68(Suppl. 1). p. 244. Abstract No. 321.
Discrete Time Survival Analysis of Lamb Mortality in a Terminal Sire Composite Population - (Peer Reviewed Journal)
Southry, B.R., Rodriguez-Zas, S.L., Leymaster, K.A. 2003. Discrete time survival analysis of lamb mortality in a terminal sire composite population. Journal of Animal Science. 81:1399-1405.
A Polymorphism in the Pig Erythropoietin Receptor (Epor) Gene Is Associated with Uterine Capacity - (Abstract Only)
Vallet, J.L., Freking, B.A., Leymaster, K.A., Christenson, R.K. 2003. A polymorphism in the pig erythropoietin receptor (EPOR) gene is associated with uterine capacity [abstract]. Journal of Animal Science 81(Supplement 2):61.
Identification of the Single Base Change Causing the Callipyge Muscle Hypertrophy Phenotype, the Only Known Example of Polar Overdominance in Mammals. - (Peer Reviewed Journal)
Freking, B.A., Murphy, S., Wylie, A., Jirtle, R.L., Rhodes, S., Keele, J.W., Leymaster, K.A., Smith, T.P. 2002. Identification of the single base change causing the callipyge muscle hypertrophy phenotype, the only known example of polar overdominance in animals. Genome Research. 12:1496-1506.
Fundamental Aspects of Crossbreeding of Sheep: Use of Breed Diversity to Improve Efficiency of Meat Production - (Peer Reviewed Journal)
Leymaster, K.A. 2002. Fundamental aspects of crossbreeding of sheep: Use of breed diversity to improve efficiency of meat production. Sheep and Goat Research Journal. 17(3):50-59.
Heterosis and Recombination Effects on Pig Growth and Carcass Traits - (Peer Reviewed Journal)
Cassady, J.P., Young, L.D., Leymaster, K.A. 2002. Heterosis and recombination effects on pig growth and carcass traits. Journal of Animal Science. 80:2286-2302.
Heterosis and Recombination Effects on Pig Reproductive Traits - (Peer Reviewed Journal)
Cassady, J.P., Young, L.D., Leymaster, K.A. 2002. Heterosis and recombination effects on pig reproductive traits. Journal of Animal Science. 80:2303-2315.
Correlated Responses in Gravid Uterine, Farrowing and Weaning Traits to Selection of Pigs for Ovulation Rate Or Uterine Capacity - (Proceedings)
CHRISTENSON, R.K., LEYMASTER, K.A. CORRELATED RESPONSES IN GRAVID UTERINE, FARROWING AND WEANING TRAITS TO SELECTION OF PIGS FOR OVULATION RATE OR UTERINE CAPACITY. PROCEEDINGS OF 7TH WORLD CONGRESS OF GENETICS APPLIED TO LIVESTOCK PRODUCTION. 2002. SESSION 08, REPRODUCTION. CD-ROM COMMUNICATION NO. 08-25.
Estimates of Genetic Parameters for Daily Gain, Feed Intake, and Behavior Traits in Ram Lambs of a Composite Population. - (Proceedings)
Leymaster, K.A., Cammack, K.M., Nielsen, M.K., Jenkins, T.G. 2002. Estimates of genetic parameters for daily gain, feed intake, and behavior traits in ram lambs of a composite population. Proceedings of the 7th World Congress of Genetics Applied in Livestock Production. CD-ROM Communication No. 10-09. Montpellier, France.
Different Breeding Schedules at 6 Month Intervals in Four Breeds of Sheep - (Proceedings)
Pala, A., Leymaster, K.A., Mccraw, R.L., Young, L.D., Robison, O.W. 2002. Different breeding schedules at 6 month intervals in four breeds of sheep. Proceedings of the 7th World Congress of Genetics Applied in Livestock Production. CD-ROM Communication No. 02-42. Montpellier, France.
Analysis of Lamb Mortality Using Competing Risks - (Proceedings)
Southey, B.R., Rodriguez-Zas, S.L., Leymaster, K.A. 2002. Analysis of lamb mortality using competing risks. Proceedings of the 7th World Congress of Genetics Applied in Livestock Production. CD-ROM Communication No. 02-03. Montpellier, France.
Genetic Parameters in 6-Month Breeding Systems - (Proceedings)
Robison, O.W., Pala, A., Leymaster, K.A., Mccraw, R.L., Young, L.D. 2002. Genetic parameters in 6-month breeding systems. Proceedings of the 7th World Congress of Genetics Applied in Livestock Production. CD-ROM Communication No. 02-43. Montpellier, France.
The Influence of Uterine Function on Embryonic and Fetal Survival - (Review Article)
Vallet, J.L., Leymaster, K.A., Christenson, R.K. 2002. The influence of uterine function on embryonic and fetal survival. Journal of Animal Science. 80(E. Suppl. 2):E115-E125.
Estimation of Genetic Parameters of Lamb Mortality Using Discrete Survival Analysis - (Peer Reviewed Journal)
Southey, B.R., Rodriguez-Zas, S.L., Leymaster, K.A. 2002. Estimation of genetic parameters of lamb mortality using discrete survival analysis. Journal of Animal Science Supplement. 80(Suppl. 2):43.
Genetic Parameters for Growth, Feed Intake, and Feeding Behavior in a Composite Population of Sheep - (Peer Reviewed Journal)
Cammack, K.M., Nielsen, M.K., Leymaster, K.A., Jenkins, T.G. 2002. Genetic parameters for growth, feed intake, and feeding behavior in a composite population of sheep. Journal of Animal Science. 80(Suppl. 2):44. (Abstract No. 31)
Identification of An Snp Associated with Callipyge in Sheep - (Abstract Only) - (01-Nov-01)
Evaluation of Wool and Hair Breeds under Intensive and Extensive Production Systems - (Abstract Only)
Leymaster, K.A. 2001. Evaluation of wool and hair breeds under intensive and extensive production systems. The Shepherd. 46(8):34-35.
Estimation of Genetic Parameters of Lamb Mortality Using Survival Analysis - (Abstract Only)
Southey, B.R., Rodriguez-Zas, S.L., Leymaster, K.A. 2001. Estimation of genetic parameters of lamb mortality using survival analysis. [abstract]. Journal of Animal Science. 79(Suppl. 1):70.
Survival Analysis of Lamb Mortality in a Terminal Sire Composite Population - (Peer Reviewed Journal)
Southey, B.R., Rodriguez-Zas, S.L., Leymaster, K.A. 2001. Survival analysis of lamb mortality in a terminal sire composite population. Journal of Animal Science. 79:2298-2306.
Effects of Selection for Ovulation Rate Or Uterine Capacity on Postweaning Return to Estrus, Weaning-to-Estrous Interval, and Postweaning Ovulation Rate in Swine - (Abstract Only)
Christenson, R.K., Leymaster, K.A., Ford, J.J., Wise, T.H. 2001. Effects of selection for ovulation rate or uterine capacity on postweaning return to estrus, weaning-to-estrous interval, and postweaning ovulation rate in swine [abstract]. Proceedings Sixth International Conference on Pig Reproduction, Columbia, Missouri, p. 116. (Abstract No. 66)
Fetal and Neonatal Ovarian Weights and Oocyte Numbers in Lines That Differ for Ovulation Rate - (Abstract Only)
Wise, T.H., Christenson, R.K., Leymaster, K.A., Ford, J.J. 2001. Fetal and neonatal ovarian weights and oocyte numbers in lines that differ for ovulation rate [abstract]. Proceedings Sixth International Conference on Pig Reproduction, Columbia, Missouri, p. 28. (Abstract No. 4)
Are Hematocrit and Placental Efficiency Selection Tools for Uterine Capacity in Swine? - (Abstract Only)
Vallet, J.L., Leymaster, K.A., Cassady, J.P., Christenson, R.K. 2001. Are hematocrit and placental efficiency selection tools for uterine capacity in swine? [abstract]. Journal of Animal Science. 79(Supplement 2):89. (Abstract No. 257)
Fetal Mortality As Influenced by Ovulation Rate and Uterine Capacity in Three Selected Lines of Pigs - (Abstract Only)
Christenson, R.K., Leymaster, K.A. 2001. Fetal mortality as influenced by ovulation rate and uterine capacity in three selected lines of pigs [abstract]. Journal of Animal Science. 79 (Supplement 2):93. (Abstract #275)
Selection for Greater Number of Corpora Lutea in Gilts Increased Plasma Follicle-Stimulating Hormone Concentrations in Prepubertal Development - (Abstract Only)
Ford, J.J., Zimmerman, D.R., Wise, T.H., Leymaster, K.A., Christenson, R.K. 2001. Selection for greater number of corpora lutea in gilts increased plasma follicle-stimulating hormone concentrations in prepubertal development [abstract]. Journal of Animal Science. 79 (Supplement 2):90. (Abstract #259)
Increased Plasma Follicle-Stimulating Hormone Concentrations in Prepubertal Gilts from Lines Selected for Increased Number of Corpora Lutea - (Peer Reviewed Journal)
Ford, J.J., Zimmerman, D.R., Wise, T.H., Leymaster, K.A., Christenson, R.K. 2001. Increased plasma follicle-stimulating hormone concentrations in prepubertal gilts from lines selected for increased number of corpora lutea. Journal of Animal Science. 79(7):1877-1882.
Direct and Correlated Responses to Selection for Ovulation Rate Or Uterine Capacity in Swine - (Abstract Only)
Leymaster, K.A., Christenson, R.K. 2000. Direct and correlated responses to selection for ovulation rate or uterine capacity in swine. [abstract]. Journal of Animal Science. 78(Suppl. 1):68.
Effects of Recombination on Weight from Birth to 154 Days of Age in Pigs - (Abstract Only)
Cassady, J.P., Leymaster, K.A. 2000. Effects of recombination on weight from birth to 154 days of age in pigs. [abstract]. Journal of Animal Science. 78(Suppl. 1):69.
Effects of Selection for Ovulation Rate Or Uterine Capacity on Gravid Uterine, Farrowing, and Weanining Traits in Swine - (Abstract Only)
Christenson, R.K., Leymaster, K.A. 2000. Effects of selection for ovulation rate or uterine capacity on gravid uterine, farrowing, and weanining traits in swine [abstract]. Journal of Animal Science. 78 (Supplement 1):202. (Abstract #853)
Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale Breeds of Sheep: I. Effects of Ram Breed on Productivity of Ewes of Two Crossbred Populations - (Peer Reviewed Journal)
Freking, B.A., Leymaster, K.A., Young, L.D. 2000. Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep: I. Effects of ram breed on productivity of ewes of two crossbred populations. Journal of Animal Science. 78:1422-1429.
Genetic Correlations for Daily Gain Between Ram and Ewe Lambs Fed in Feedlot Conditions and Ram Lambs Fed in Pinpointer Units - (Peer Reviewed Journal) - (01-Nov-99)
Evaluation of Paternal Polar Overdominance Based on All Possible Matings among Callipyge (Clpg) Genotypes - (Abstract Only) - (01-Jul-99)
Genotypic Effects at the Callipyge Locus for Meat Quality Traits in Lambs - (Abstract Only) - (01-Jul-99)
Correlated Responses of Uterine and Ovarian Traits to Selection for Ovulation Rate Or Uterine Capacity in Swine - (Abstract Only) - (01-Mar-99)
Genetic Correlations among Average Daily Gains of Ram and Ewe Lambs Fed under Typical Conditions and Rams Fed in Pinpointer Units - (Abstract Only) - (01-Mar-99)
Estimation of Genetic Parameters for Growth Traits for a Composite Terminal Sire Breed of Sheep - (Peer Reviewed Journal) - (25-Feb-99)
Evaluation of the Ovine Callipyge Locus: Iii. Genotypic Effects on Meat Quality Traits - (Peer Reviewed Journal) - (23-Feb-99)
Fine Mapping of the Ovine Callipyge Locus - (Abstract Only) - (15-Jan-99)
Evaluation of the Ovine Callipyge Locus: Ii. Genotypic Effects on Growth, Slaughter, and Carcass Traits - (Peer Reviewed Journal) - (17-Jun-98)
Evaluation of the Ovine Callipyge Locus: I. Relative Chromosomal Position and Gene Action - (Peer Reviewed Journal) - (08-Apr-98)
Genetic Aspects of Callipyge Implementation by the Sheep Industry - (Abstract Only) - (01-Mar-98)
Effect of Callipyge (Clpg) Genotypes on Growth, Carcass, and Reproduction Traits - (Abstract Only) - (01-Mar-98)
A Second Generation Linkage Map of the Sheep Genome - (Peer Reviewed Journal) - (18-Nov-97)
Genetic Variations and Associations for Improving Meat Production and Meat Qualities in Sheep and Goats - (Proceedings) - (21-Aug-97)
Estimation of Chromosomal Position and Effects of the Callipyge Allele (Clpg) Using Quantitative Measurements of Carcass Traits - (Abstract Only) - (24-Apr-97)
A Genetic Map of the Ovine Genome - (Abstract Only) - (24-Apr-97)
Extensive Genomic Conservation of Cattle Microsatellite Heterozygosity in Sheep (Short Communication) - (Abstract Only) - (17-Apr-97)
A Simulation Model Including Ovulation Rate, Potential Embryonic Viability,and Uterine Capacity to Explain Litter Size in Mice. Ii. Responses to Alternative Criteria of Selection - (Peer Reviewed Journal) - (16-Oct-96)
A Simulation Model Including Ovulation Rate, Potential Embryonic Viability,and Uterine Capacity to Explain Litter Size in Mice. I. Model Development and Implementation - (Peer Reviewed Journal) - (16-Oct-96)
Effects of the Callipyge Phenotype on Carcass and Meat Quality Traits of Lambs - (Abstract Only) - (10-Jun-96)
Opportunities for Indirect Selection for Uterine Capcity of Swine - (Abstract Only) - (10-Jun-96)
Evaluation of a Simulation Model Including Ovulation Rate, Potential Embryonic Viability, and Uterine Capacity to Explain Litter Size in Mice - (Abstract Only) - (10-Jun-96)
A Second Generation Genetic Map of the Ovine Genome - (Abstract Only) - (10-Jun-96)
Comparison and Validation of Electromagnetic Scanning Versus Traditional Carcass Measures When Predicting Fat-Free Lean in Lamb Carcasses - (Abstract Only) - (09-Jun-96)
Development and Evaluation of a Regression Equation of Prediction for Fat-Free Soft Tissue in Heterogenous Populations of Cattle - (Peer Reviewed Journal) - (25-Sep-95)
Last Modified: 4/1/2013