SAES-422 Multistate Research Activity Accomplishments Report
Sections
Status: Approved
Basic Information
- Project No. and Title: NCR190 : Increased Efficiency of Sheep Production
- Period Covered: 07/01/2002 to 06/01/2003
- Date of Report: 12/01/2003
- Annual Meeting Dates: 06/04/2003 to 06/06/2003
Participants
[Minutes]
Accomplishments
The greatest short term impact of this committee is the publication of papers on crossbreeding and seasonality. These papers have been published in Journals along with distributed to popular press. It was estimated that over 40,000 subscribers have seen these publications. Additionally, these publications have been made available on the web at the primary authors institution and American Sheep Industry Associatoin web site. Seasonality has been identified as a critical factor limiting the American Sheep Industry. Summarization of work conducted by NCR 190 and previously by NC 111 committees provides producer with the information necessary to successfully over come seasonality in their sheep operations. Producers who apply the principals outlined in the crossbreeding
Impacts
- Increased production per ewe from operations that impliment crossbreeding programs.
- Improved year round lamb supply from increased fall lambing by genetic improvement and management.
- Increased consumer demand for lamb as a result of improve genetics and feeding systems developed as part of the NCR 190 objectives.
- Growth and expansion of the Dairy Sheep Industry in United States due to committee efforts to increase milk production.
Publications
PURDUE UNIVERSITY
Journal Articles:
Ongeri, E.M., C.L. Bormann, R.E. Butler, D. Melican, W.G. Gavin, Y. Echelard, R.L. Krisher, and E. Behboodi. 2001. Development of goat embryos after in vitro fertilization and parthenogenetic activation by different methods. Theriogenology 55:1933-1945.
Ongeri, E.M., and R.L. Krisher. 2001. Glucose and pyruvate metabolism of pre-implantation goat blastocysts following in vitro fertilization and parthenogenetic activation. Cloning and Stem Cells 3:115-123.
Bormann, C.L., E.M. Ongeri, and R.L. Krisher. 2003. The effect of vitamins during maturation of caprine oocytes on subsequent developmental potential in vitro. Theriogenology 59:1373-1380.
Diekman, M.A., M.K. Neary, and G.R. Kelly. 2003. Repeated injections of pregnant mare serum gonadotrophin (PMSG) failed to induce antibody production in fall lambing ewes. Sheep and Goat Res. J. 18(in press).
Abstracts:
Bormann, C.L., E.M. Ongeri, and R.L. Krisher. 2000. Effect of vitamins during maturation on subsequent developmental capacity of caprine oocytes. Biol. Reprod. 62 (suppl 1):166.
Ongeri, E.M., C.L. Bormann, R. Butler, D. Mellican, E. Schalar, S. Blash, E. Behboodi, and R.L. Krisher. 2000. Parthenogenic development of goat oocytes activated by different methods. Biol. Reprod. 62 (suppl 1):322.
Ongeri, E.M., and R.L. Krisher. 2001. Glucose and pyruvate metabolism of preimplantation goat blastocysts following in vitro fertilization and parthenogenetic activation. Theriogenology 55:458.
Bormann, C.L., J.E. Swain, A.L. Clifford, D.D. Gourley, and R.L. Krisher. 2001. Effect of recipient oocyte metabolism on development of ovine nuclear transfer embryos. Biol. Reprod. 64 (suppl. 1):93.
Clifford, A.L., C.L. Bormann, and R.L. Krisher. 2002. Timing of fertilization relative to oocyte nuclear maturation in sheep. Theriogenology 57:716.
Durkin, R.E., C.A. Bidwell, A.C. Clifford, and R.L. Krisher. 2002. Gene expression and DNA methylation of an imprinted gene cluster on ovine chromosome 18 during early embryonic development. Proceedings, First International Meeting on Mammalian Embryo Genomics:51.
Extension Publications:
Neary, M.K., and A.L. Yager. 2002. Methods of livestock identification. Purdue University AS-556-W.
Mitchell, B., M.K. Neary, and G.R. Kelly. 2003. Blood sampling in sheep. Purdue University AS-557-W.
Yager, A.L., M.K. Neary, and W. Singleton. 2003. Estrus detection in farm animals. Purdue University AS-559-W.
Neary, M.K., and A.L. Yager. 2002. Body condition scoring in farm animals. Purdue University AS-550-W.
U.S. MEAT ANIMAL RESEARCH CENTER
USDA-ARS; CLAY CENTER, NE
Journal Articles:
Freking, B. A., S. Murphy, A. Wylie, R. L. Jirtle, S. Rhodes, J. W. Keele, K. A. Leymaster, and T. P. L. Smith. 2002. Identification of the single base change causing the callipyge muscle hypertrophy phenotype, the only known example of polar overdominance in mammals. Genome Res. 12:1496-1506.
Freking, B. A.,T. P. L. Smith, K. A. Leymaster, and R. L. Jirtle. 2002. DNA-based test for callipyge genotypic status in sheep. Provisional patent P.C. 0191.01 filed December 23, 2002 with Patents and Trademarks, Washington, D.C.
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.
Freking, B. A., T. P. L. Smith, and K. A. Leymaster. 2003. The callipyge mutation for sheep muscular hypertrophy Genetics, Physiology, and Meat Quality. In Muscle Development of Livestock Animals: Physiology, Genetics, and Meat Quality (ed. M. tePas, H. Haagsman, and M. Everts), CAB International (Submitted)
Freetly, H. C., and K. A. Leymaster. 2003. Relationship between litter birth weight and litter size in six breeds of sheep. J. Anim. Sci. (Submitted)
Heaton, M. P., K. A. Leymaster, B. A. Freking, D. A. Hawk, J. W. Keele, W. M. Snelling, J. M. Fox, C. G. Chitko-McKown, and W. W. Laegreid. 2003. Prion gene sequence variation within diverse groups of U.S. sheep, beef cattle, and deer. Mamm. Genome. (Accepted 5-21-03)
Southey, B. R., S. L. Rodriguez-Zas, and K. A. Leymaster. 2003. Discrete time survival analysis of lamb mortality in a terminal sire composite population. J. Anim. Sci. 81:1399-1405.
Abstracts and Proceedings:
Cammack, K. M., M. K. Nielsen, K. A. Leymaster, and T. G. Jenkins. 2002. Genetic parameters for growth, feed intake, and feeding behavior in a composite population of sheep. J. Anim. Sci. 80(Suppl. 2):44. (Abstract No. 31)
Leymaster, K. A., K. M. Cammack, M. K. Nielsen, and T. G. Jenkins. 2002. Estimates of genetic parameters for daily gain, feed intake, and behavior traits in ram lambs of a composite population. CD-ROM Communication n0 10-09 in Proc. 7th World Cong. Genet. Appl. Livest. Prod., Montpellier, France.
Pala, A., K. A. Leymaster, R. L. McCraw, L. D. Young, and O. W. Robinson. 2002. Different breeding schedules at 6 month intervals in four breeds of sheep. CD-ROM Communication n0 02-42 in Proc. 7th World Cong. Genet. Appl. Livest. Prod., Montpellier, France.
Robinson, O. W., A. Pala, K. A. Leymaster, R. L. McCraw, and L. D. Young. 2002. Genetic parameters in 6-month breeding systems. CD-ROM Communication n0 02-43 in Proc. 7th World Cong. Genet. Appl. Livest. Prod., Montpellier, France.
Smith, T. P., B. A. Freking, and K. A. Leymaster. 2002. Identification of an SNP associated with callipyge in sheep. Page 224 in Proc. Plant and Animal Genome X, San Diego, CA. (Abstract)
Southey, B. R., S. L. Rodriguez-Zas, and K. A. Leymaster. 2002. Analysis of lamb mortality using competing risks. CD-ROM Communication n0 02-03 in Proc. 7th World Cong. Genet. Appl. Livest. Prod., Montpellier, France.
Southey, B. R., S. L. Rodriguez-Zas, and K. A. Leymaster. 2002. Estimation of genetic parameters of lamb mortality using discrete survival analysis. J. Anim. Sci. 80(Suppl. 2):43. (Abstract No. 28)
Casas, E., B. A. Freking, and K. A. Leymaster. 2003. Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep: Productivity of F1 ewes in fall breeding seasons. J. Anim. Sci. (Abstract, accepted)
Shackelford, S. D., K. A. Leymaster, T. L. Wheeler, and M. Koohmaraie. 2003. Effects of breed of sire on carcass composition and sensory traits of lamb. Proc. Reciprocal Meat Conf. (Abstract, accepted)
Smith, T. P. L., B. A. Freking, K. A. Leymaster, B. T. Page, E. Casas, G. L. Bennett, and J. W. Keele. 2003. DNA sequence variation as a selection tool in livestock: A simple base change causes callipyge in sheep. Proc. Horizons Livest. Conf., Queensland, Australia. (Abstract, accepted)
Southey, B. R., S. L. Rodriguez-Zas, and K. A. Leymaster. 2003. Competing risks analysis of lamb mortality. J. Anim. Sci. (Abstract, accepted)
Popular Press:
Leymaster, K. A. 2002. Fundamental aspects of crossbreeding of sheep: Use of breed diversity to improve efficiency of meat production. Sheep Industry News 6(11):16-20, 2002; The Shepherd, 47(11):8-17, 2002; Ranch & Rural Living 84(3):22-26 (Part I), 2002; and 84(4):19-24 (Part II), 2003; Banner 26(1):52-64, 2003.
Shackelford, S. D., Leymaster, K., Wheeler, T. L. and Koohmaraie, M. 2003. Evaluation of breeds for carcass composition and meat quality. Sheep Magazine 24:23.
VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY
Journal Articles:
Notter, D. R. and D. P. Sponenburg. 2002. Genetic control of color in Dorper sheep and their crosses. Sheep Goat Res. J. 17:47-51.
Smit, M. A., T. L. Shay, J. E. Beever, D. R. Notter and N. E. Cockett. 2002. Identification of an agouti-like locus in sheep. Anim. Genet. 33:383-384.
Notter, D. R. 2002. Opportunities to reduce seasonality of breeding in sheep by selection. Sheep Goat Res. J. 17:20-32.
Abstracts and Proceedings:
Notter, D. R., N. E. Cockett, and T. L. Shay. 2002. Effect of the melatonin receptor 1a gene on fertility and litter size in sheep. Proc. 7th World Congr. Genet. Appl. Livest. Prod. CD-ROM communication no. 08-03 (30:637-640).
Banos, G., R.M. Lewis, D.R. Notter, and D.E. Hogue. 2002. Genetic profile of fertility and prolificacy of maiden and mature ewes managed in a frequent lambing system. Proc. 7th World Congr. Genet. Appl. Livest. Prod. CD-ROM communication no. 08-21 (30: 713-716).
Notter, D. R. 2002. Genetics of fertility in sheep. Proc. Xth Int. Congr. Asian-Australasian Assoc. Anim. Prod. Soc., New Delhi, India, September 23-27, pp. 51-52.
Vanimisetti, H. B., S. L. Andrew, A. M. Zajac, and D. R. Notter. 2002. Genetic and phenotypic relationships among fecal egg count, packed cell volume, and body weight in sheep infected with Haemonchus contortus. Proc. Xth Int. Congr. Asian-Australasian Assoc. Anim. Prod. Soc., New Delhi, India, September 23-27, p. 299.
Vanimisetti, H. B., S. P. Greiner, A. M. Zajac, and D. R. Notter. 2002. Between-breed variation in response to Haemonchus contortus infection in sheep. J. Anim. Sci. 80(Suppl. 1):148.
Greiner, S. P., D. R. Notter, and H.-B. Vanimisetti. 2002. Evaluation of hair sheep composite breeds for easy-care lamb production: progress report. Proc. Virginia-North Carolina Shepherds‘ Symp., Blacksburg, VA, January 4-5, pp. 6-10.
VIRGINIA STATE UNIVERSITY
Abstracts and Proceedings:
Wildeus, S. J.E. Miller, and J. R. Collins. 2003. Gastrointestinal parasitism in pasture and pen-reared lambs of three hair sheep breeds in the southeastern U. S. Southern Sect. ASAS meeting, Mobile, AL (Abstract 89)
Wildeus, S. H. N. Zerby, K. E. Turner and J. R. Collins. 2003. Growth and carcass characteristics in lambs from three hair sheep breeds raised on pasture and hay-based diets. Southern Sect. ASAS meeting, Mobile, AL (Abstract 111)
University of Wisconsin-Madison
Journal Articles:
Chang, Y. M., R. Rekaya, D. Gianola and D. L. Thomas. 2002. Genetic variation of lactation curves in dairy sheep: quadratic function versus Wood‘s model. Livestock Prod. Sci. 77:147-153.
McKusick, B. C., D. L. Thomas, and Y. M. Berger. 2003. Effect of omission of machine stripping on milk production and parlor throughput in East Friesian dairy ewes. J. Dairy Sci. 86:680-687.
McKusick, B. C., D. L. Thomas, Y. M. Berger, and P.G. Marnet. 2002. Effect of milking interval on alveolar versus cisternal milk accumulation, and milk production and composition in dairy ewes. J. Dairy Sci. 85:2197-2206.
McKusick, B. C., D. L. Thomas, J. E. Romero, and P.G. Marnet. 2002. Effect of weaning system on milk composition and distribution of milk fat within the udder of East Friesian dairy ewes. J. Dairy Sci. 85:2521-2528.
Abstracts and Proceedings:
Berger, Y. M. 2002. Economics of winter milking for medium to large dairy sheep operations Proc. 8th Great lakes Dairy Sheep Symp., Cornell University, Ithaca, New York. University of Wisconsin-Madison, Dept. of Anim. Sci. pp. 118-126.
Berger, Y. M. 2002. Use of super-prolific breeds and artificial rearing of lambs. Proc. 50th Annual Spooner Sheep Day, Dept. Animal Sci., Univ. of Wisconsin-Madison. p. 51.
Thomas, D. L. 2002. Dairy sheep The research emphasis starting in 1993. Proc. 50th Annual Spooner Sheep Day, Dept. Animal Sci., Univ. of Wisconsin-Madison. pp. 89-93.
Thomas, D. L., Y. M. Berger, and B. C. McKusick. 2002. The effect of IBR/PI3 and Pasteurella vaccination on the mortality rate of high percentage East Friesian lambs. Proc. 8th Great lakes Dairy Sheep Symp., Cornell University, Ithaca, New York. University of Wisconsin-Madison, Dept. of Anim. Sci. pp. 95-101.
Popular Press and Extension:
Thomas, D. L. 2002. Breeding ewe lambs or getting the most out of ewe lambs. 2001-2002 Sheep Management ETN Program. Viewed at: [http://www.uwex.edu/ces/animalscience/sheep/].
West Virginia University
Journal Articles
Knights, M., Hoehn, T., Lewis, P. E., and Inskeep, E. K., 2001a. Effectiveness of intravaginal progesterone inserts and FSH for inducing synchronized estrus and increasing lambing rate in anestrous ewes. J.Anim.Sci. 79, 1120-1131.
Knights, M., Maze, T. D., Bridges, P. J., Lewis, P. E., and Inskeep, E. K., 2001b.
Short-term treatment with a controlled internal drug releasing (CIDR)
device and FSH to induce fertile estrus and increase prolificacy in anestrous ewes. Theriogenology 55, 1181-1191.
Knights, M., Baptiste, Q. S., and Lewis, P. E. 2002. Ability of ram introduction
to induce an increase in LH secretion, estrus and ovulation in fall-born ewe lambs during anestrus. Anim. Reprod. Sci. 69 (3-4):199-209.
Knights, M., Baptiste, Q. S., Dixon, A.B., Pate, J.L., Marsh, D., Inskeep, E.K., and
Lewis, P. E. 2003. Effect of Dosage of Follicle Stimulating Hormone (FSH), Vehicle and Time of Injection on Ovulation Rate and Prolificacy in Anestrous Ewes. Small Ruminant research (in press)
Oregon State University
Meyer, H.H. 2002. Genetic and environmental impacts on prenatal loss. Sheep & Goat Research Journal. 17:11-14.
Utah State University
Bunch, T.D. , S. Wang,, N.E. Cockett, T.L. Shay, J. M. Miller, A. Maciulis, R.C. Evans, G.R. Holyoak, W.C. Foote and J.W. Call. 2002. The PRPN gene polymorphic distribution in embryo transfer flocks used for studying scrapie transmission. Plant, Animal & Microbe Genomes X. P134, p 111.
Wang, S. N. E. Cockett, J.M. Miller, T.L. Shay, A. Maciulis, D.L. Sutton, W.C. Foote, G.R. Holyoak, R.C. Evans, T.D. Bunch. J.E. Beever, J.W. Call, W.D. Taylor and M.R. Marshall. 2002. Polymorphic distribution of the ovine prion protein (PRP) gene in scrapie-infected sheep flocks in which embryo transfer was used to circumvent the transmissions of scrapie. Theriogenology. 57:1865-1875.
UNIVERSITY OF THE VIRGIN ISLANDS AGRICULTURAL EXPERIMENT STATION
Journal Articles:
Godfrey, R.W. 2002. Barbados Blackbelly Sheep. In: Animal Health and Production Compendium. Wallingford, UK: CAB International.
Panitz, E., R. W. Godfrey and R.E.Dodson 2002 Resistance to Ivermectin and effect of topical Eprinomectin on faecal egg counts in St. Croix White hair sheep. Vet. Res. Com. 26:443-446.
Abstracts:
Godfrey, R.W., Dodson, R.E. and A.J. Weis. 2002. The effect of flushing hair sheep ewes during the dry season in the tropics. J. Anim. Sci. 80(Suppl. 2):31.
Henry, D.M. and R.W. Godfrey. 2002. Evaluation of a laser thermometer for measuring the internal scrotal temperature of hair sheep rams. J. Anim. Sci. 80(Suppl. 2):31
Godfrey, R.W., Weis, A.J. and R.E. Dodson. 2002. Performance of St. Croix White and Dorper x St. Croix White lambs from birth to weaning in the tropics. J. Anim. Sci. 80(Suppl. 1):405.
North Dakota State University
Proceedings and Reports
Dahl, J.D., K. K. Sedivec, T. C. Faller, J. F. Karn, P.E. Nyren, and J. Olson. 2003. Effects of multi-species grazing on leafy spurge infested rangeland using twice-over and season-long grazing treatments. (A seven year summary). P. 18-24 In: Proc Western Dakota Sheep Day. N.D. State Univ. Hettinger Res. Ext Center. Rep. No. 43 Hettinger.
Dahl, J.D., K. K. Sedivec, T. C. Faller, J. F. Karn, P. E. Nyren, and J. Olson 2003. Multi-species grazing and single species grazing on leafy spurge infected rangeland. (A seven year summary). P. 25-32 In: Proc. Western Dakota Sheep Day. N.D. State Univ. Hettinger Res. Ext. Center Rep. No. 43 Hettinger.
Poland W. C., T. C. Faller, and L. Tisor. 2003. Effects of chickling vetch (Lathyrus sativus L.) Or alfalfa (Medicago sativus) in gestating ewe diets. P. 33-38 In: Proc. Western Dakota Sheep Day. N.D. State Univ. Hettinger Research Ext. Center. Rep. No. 43 Hettinger.
Faulkner M., K. K. Sedivec, J. Olson, T. C. Faller, J.D. Dahl, and G.P. Lardy 2003, Effects of dormant grazing on herbage production and plant growth. P. 39-50 In: Proc. Western Dakota Sheep Day. N.D. State Univ. Hettinger Research Ext. Center. Rep. No. 43 Hettinger
Faller T. C. , P. T. Berg, and J. D. Dahl 2003. Out of season reproductive potential of western white-faced Rambouillet ewes under North Dakota conditions. P. 56-63 In Proc.
Western Dakota Sheep Day, N.D. State Univ. Hettinger Research Ext. Center. Rep. No. 43 Hettinger.
Journal Articles:
Ongeri, E.M., C.L. Bormann, R.E. Butler, D. Melican, W.G. Gavin, Y. Echelard, R.L. Krisher, and E. Behboodi. 2001. Development of goat embryos after in vitro fertilization and parthenogenetic activation by different methods. Theriogenology 55:1933-1945.
Ongeri, E.M., and R.L. Krisher. 2001. Glucose and pyruvate metabolism of pre-implantation goat blastocysts following in vitro fertilization and parthenogenetic activation. Cloning and Stem Cells 3:115-123.
Bormann, C.L., E.M. Ongeri, and R.L. Krisher. 2003. The effect of vitamins during maturation of caprine oocytes on subsequent developmental potential in vitro. Theriogenology 59:1373-1380.
Diekman, M.A., M.K. Neary, and G.R. Kelly. 2003. Repeated injections of pregnant mare serum gonadotrophin (PMSG) failed to induce antibody production in fall lambing ewes. Sheep and Goat Res. J. 18(in press).
Abstracts:
Bormann, C.L., E.M. Ongeri, and R.L. Krisher. 2000. Effect of vitamins during maturation on subsequent developmental capacity of caprine oocytes. Biol. Reprod. 62 (suppl 1):166.
Ongeri, E.M., C.L. Bormann, R. Butler, D. Mellican, E. Schalar, S. Blash, E. Behboodi, and R.L. Krisher. 2000. Parthenogenic development of goat oocytes activated by different methods. Biol. Reprod. 62 (suppl 1):322.
Ongeri, E.M., and R.L. Krisher. 2001. Glucose and pyruvate metabolism of preimplantation goat blastocysts following in vitro fertilization and parthenogenetic activation. Theriogenology 55:458.
Bormann, C.L., J.E. Swain, A.L. Clifford, D.D. Gourley, and R.L. Krisher. 2001. Effect of recipient oocyte metabolism on development of ovine nuclear transfer embryos. Biol. Reprod. 64 (suppl. 1):93.
Clifford, A.L., C.L. Bormann, and R.L. Krisher. 2002. Timing of fertilization relative to oocyte nuclear maturation in sheep. Theriogenology 57:716.
Durkin, R.E., C.A. Bidwell, A.C. Clifford, and R.L. Krisher. 2002. Gene expression and DNA methylation of an imprinted gene cluster on ovine chromosome 18 during early embryonic development. Proceedings, First International Meeting on Mammalian Embryo Genomics:51.
Extension Publications:
Neary, M.K., and A.L. Yager. 2002. Methods of livestock identification. Purdue University AS-556-W.
Mitchell, B., M.K. Neary, and G.R. Kelly. 2003. Blood sampling in sheep. Purdue University AS-557-W.
Yager, A.L., M.K. Neary, and W. Singleton. 2003. Estrus detection in farm animals. Purdue University AS-559-W.
Neary, M.K., and A.L. Yager. 2002. Body condition scoring in farm animals. Purdue University AS-550-W.
U.S. MEAT ANIMAL RESEARCH CENTER
USDA-ARS; CLAY CENTER, NE
Journal Articles:
Freking, B. A., S. Murphy, A. Wylie, R. L. Jirtle, S. Rhodes, J. W. Keele, K. A. Leymaster, and T. P. L. Smith. 2002. Identification of the single base change causing the callipyge muscle hypertrophy phenotype, the only known example of polar overdominance in mammals. Genome Res. 12:1496-1506.
Freking, B. A.,T. P. L. Smith, K. A. Leymaster, and R. L. Jirtle. 2002. DNA-based test for callipyge genotypic status in sheep. Provisional patent P.C. 0191.01 filed December 23, 2002 with Patents and Trademarks, Washington, D.C.
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.
Freking, B. A., T. P. L. Smith, and K. A. Leymaster. 2003. The callipyge mutation for sheep muscular hypertrophy Genetics, Physiology, and Meat Quality. In Muscle Development of Livestock Animals: Physiology, Genetics, and Meat Quality (ed. M. tePas, H. Haagsman, and M. Everts), CAB International (Submitted)
Freetly, H. C., and K. A. Leymaster. 2003. Relationship between litter birth weight and litter size in six breeds of sheep. J. Anim. Sci. (Submitted)
Heaton, M. P., K. A. Leymaster, B. A. Freking, D. A. Hawk, J. W. Keele, W. M. Snelling, J. M. Fox, C. G. Chitko-McKown, and W. W. Laegreid. 2003. Prion gene sequence variation within diverse groups of U.S. sheep, beef cattle, and deer. Mamm. Genome. (Accepted 5-21-03)
Southey, B. R., S. L. Rodriguez-Zas, and K. A. Leymaster. 2003. Discrete time survival analysis of lamb mortality in a terminal sire composite population. J. Anim. Sci. 81:1399-1405.
Abstracts and Proceedings:
Cammack, K. M., M. K. Nielsen, K. A. Leymaster, and T. G. Jenkins. 2002. Genetic parameters for growth, feed intake, and feeding behavior in a composite population of sheep. J. Anim. Sci. 80(Suppl. 2):44. (Abstract No. 31)
Leymaster, K. A., K. M. Cammack, M. K. Nielsen, and T. G. Jenkins. 2002. Estimates of genetic parameters for daily gain, feed intake, and behavior traits in ram lambs of a composite population. CD-ROM Communication n0 10-09 in Proc. 7th World Cong. Genet. Appl. Livest. Prod., Montpellier, France.
Pala, A., K. A. Leymaster, R. L. McCraw, L. D. Young, and O. W. Robinson. 2002. Different breeding schedules at 6 month intervals in four breeds of sheep. CD-ROM Communication n0 02-42 in Proc. 7th World Cong. Genet. Appl. Livest. Prod., Montpellier, France.
Robinson, O. W., A. Pala, K. A. Leymaster, R. L. McCraw, and L. D. Young. 2002. Genetic parameters in 6-month breeding systems. CD-ROM Communication n0 02-43 in Proc. 7th World Cong. Genet. Appl. Livest. Prod., Montpellier, France.
Smith, T. P., B. A. Freking, and K. A. Leymaster. 2002. Identification of an SNP associated with callipyge in sheep. Page 224 in Proc. Plant and Animal Genome X, San Diego, CA. (Abstract)
Southey, B. R., S. L. Rodriguez-Zas, and K. A. Leymaster. 2002. Analysis of lamb mortality using competing risks. CD-ROM Communication n0 02-03 in Proc. 7th World Cong. Genet. Appl. Livest. Prod., Montpellier, France.
Southey, B. R., S. L. Rodriguez-Zas, and K. A. Leymaster. 2002. Estimation of genetic parameters of lamb mortality using discrete survival analysis. J. Anim. Sci. 80(Suppl. 2):43. (Abstract No. 28)
Casas, E., B. A. Freking, and K. A. Leymaster. 2003. Evaluation of Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep: Productivity of F1 ewes in fall breeding seasons. J. Anim. Sci. (Abstract, accepted)
Shackelford, S. D., K. A. Leymaster, T. L. Wheeler, and M. Koohmaraie. 2003. Effects of breed of sire on carcass composition and sensory traits of lamb. Proc. Reciprocal Meat Conf. (Abstract, accepted)
Smith, T. P. L., B. A. Freking, K. A. Leymaster, B. T. Page, E. Casas, G. L. Bennett, and J. W. Keele. 2003. DNA sequence variation as a selection tool in livestock: A simple base change causes callipyge in sheep. Proc. Horizons Livest. Conf., Queensland, Australia. (Abstract, accepted)
Southey, B. R., S. L. Rodriguez-Zas, and K. A. Leymaster. 2003. Competing risks analysis of lamb mortality. J. Anim. Sci. (Abstract, accepted)
Popular Press:
Leymaster, K. A. 2002. Fundamental aspects of crossbreeding of sheep: Use of breed diversity to improve efficiency of meat production. Sheep Industry News 6(11):16-20, 2002; The Shepherd, 47(11):8-17, 2002; Ranch & Rural Living 84(3):22-26 (Part I), 2002; and 84(4):19-24 (Part II), 2003; Banner 26(1):52-64, 2003.
Shackelford, S. D., Leymaster, K., Wheeler, T. L. and Koohmaraie, M. 2003. Evaluation of breeds for carcass composition and meat quality. Sheep Magazine 24:23.
VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY
Journal Articles:
Notter, D. R. and D. P. Sponenburg. 2002. Genetic control of color in Dorper sheep and their crosses. Sheep Goat Res. J. 17:47-51.
Smit, M. A., T. L. Shay, J. E. Beever, D. R. Notter and N. E. Cockett. 2002. Identification of an agouti-like locus in sheep. Anim. Genet. 33:383-384.
Notter, D. R. 2002. Opportunities to reduce seasonality of breeding in sheep by selection. Sheep Goat Res. J. 17:20-32.
Abstracts and Proceedings:
Notter, D. R., N. E. Cockett, and T. L. Shay. 2002. Effect of the melatonin receptor 1a gene on fertility and litter size in sheep. Proc. 7th World Congr. Genet. Appl. Livest. Prod. CD-ROM communication no. 08-03 (30:637-640).
Banos, G., R.M. Lewis, D.R. Notter, and D.E. Hogue. 2002. Genetic profile of fertility and prolificacy of maiden and mature ewes managed in a frequent lambing system. Proc. 7th World Congr. Genet. Appl. Livest. Prod. CD-ROM communication no. 08-21 (30: 713-716).
Notter, D. R. 2002. Genetics of fertility in sheep. Proc. Xth Int. Congr. Asian-Australasian Assoc. Anim. Prod. Soc., New Delhi, India, September 23-27, pp. 51-52.
Vanimisetti, H. B., S. L. Andrew, A. M. Zajac, and D. R. Notter. 2002. Genetic and phenotypic relationships among fecal egg count, packed cell volume, and body weight in sheep infected with Haemonchus contortus. Proc. Xth Int. Congr. Asian-Australasian Assoc. Anim. Prod. Soc., New Delhi, India, September 23-27, p. 299.
Vanimisetti, H. B., S. P. Greiner, A. M. Zajac, and D. R. Notter. 2002. Between-breed variation in response to Haemonchus contortus infection in sheep. J. Anim. Sci. 80(Suppl. 1):148.
Greiner, S. P., D. R. Notter, and H.-B. Vanimisetti. 2002. Evaluation of hair sheep composite breeds for easy-care lamb production: progress report. Proc. Virginia-North Carolina Shepherds‘ Symp., Blacksburg, VA, January 4-5, pp. 6-10.
VIRGINIA STATE UNIVERSITY
Abstracts and Proceedings:
Wildeus, S. J.E. Miller, and J. R. Collins. 2003. Gastrointestinal parasitism in pasture and pen-reared lambs of three hair sheep breeds in the southeastern U. S. Southern Sect. ASAS meeting, Mobile, AL (Abstract 89)
Wildeus, S. H. N. Zerby, K. E. Turner and J. R. Collins. 2003. Growth and carcass characteristics in lambs from three hair sheep breeds raised on pasture and hay-based diets. Southern Sect. ASAS meeting, Mobile, AL (Abstract 111)
University of Wisconsin-Madison
Journal Articles:
Chang, Y. M., R. Rekaya, D. Gianola and D. L. Thomas. 2002. Genetic variation of lactation curves in dairy sheep: quadratic function versus Wood‘s model. Livestock Prod. Sci. 77:147-153.
McKusick, B. C., D. L. Thomas, and Y. M. Berger. 2003. Effect of omission of machine stripping on milk production and parlor throughput in East Friesian dairy ewes. J. Dairy Sci. 86:680-687.
McKusick, B. C., D. L. Thomas, Y. M. Berger, and P.G. Marnet. 2002. Effect of milking interval on alveolar versus cisternal milk accumulation, and milk production and composition in dairy ewes. J. Dairy Sci. 85:2197-2206.
McKusick, B. C., D. L. Thomas, J. E. Romero, and P.G. Marnet. 2002. Effect of weaning system on milk composition and distribution of milk fat within the udder of East Friesian dairy ewes. J. Dairy Sci. 85:2521-2528.
Abstracts and Proceedings:
Berger, Y. M. 2002. Economics of winter milking for medium to large dairy sheep operations Proc. 8th Great lakes Dairy Sheep Symp., Cornell University, Ithaca, New York. University of Wisconsin-Madison, Dept. of Anim. Sci. pp. 118-126.
Berger, Y. M. 2002. Use of super-prolific breeds and artificial rearing of lambs. Proc. 50th Annual Spooner Sheep Day, Dept. Animal Sci., Univ. of Wisconsin-Madison. p. 51.
Thomas, D. L. 2002. Dairy sheep The research emphasis starting in 1993. Proc. 50th Annual Spooner Sheep Day, Dept. Animal Sci., Univ. of Wisconsin-Madison. pp. 89-93.
Thomas, D. L., Y. M. Berger, and B. C. McKusick. 2002. The effect of IBR/PI3 and Pasteurella vaccination on the mortality rate of high percentage East Friesian lambs. Proc. 8th Great lakes Dairy Sheep Symp., Cornell University, Ithaca, New York. University of Wisconsin-Madison, Dept. of Anim. Sci. pp. 95-101.
Popular Press and Extension:
Thomas, D. L. 2002. Breeding ewe lambs or getting the most out of ewe lambs. 2001-2002 Sheep Management ETN Program. Viewed at: [http://www.uwex.edu/ces/animalscience/sheep/].
West Virginia University
Journal Articles
Knights, M., Hoehn, T., Lewis, P. E., and Inskeep, E. K., 2001a. Effectiveness of intravaginal progesterone inserts and FSH for inducing synchronized estrus and increasing lambing rate in anestrous ewes. J.Anim.Sci. 79, 1120-1131.
Knights, M., Maze, T. D., Bridges, P. J., Lewis, P. E., and Inskeep, E. K., 2001b.
Short-term treatment with a controlled internal drug releasing (CIDR)
device and FSH to induce fertile estrus and increase prolificacy in anestrous ewes. Theriogenology 55, 1181-1191.
Knights, M., Baptiste, Q. S., and Lewis, P. E. 2002. Ability of ram introduction
to induce an increase in LH secretion, estrus and ovulation in fall-born ewe lambs during anestrus. Anim. Reprod. Sci. 69 (3-4):199-209.
Knights, M., Baptiste, Q. S., Dixon, A.B., Pate, J.L., Marsh, D., Inskeep, E.K., and
Lewis, P. E. 2003. Effect of Dosage of Follicle Stimulating Hormone (FSH), Vehicle and Time of Injection on Ovulation Rate and Prolificacy in Anestrous Ewes. Small Ruminant research (in press)
Oregon State University
Meyer, H.H. 2002. Genetic and environmental impacts on prenatal loss. Sheep & Goat Research Journal. 17:11-14.
Utah State University
Bunch, T.D. , S. Wang,, N.E. Cockett, T.L. Shay, J. M. Miller, A. Maciulis, R.C. Evans, G.R. Holyoak, W.C. Foote and J.W. Call. 2002. The PRPN gene polymorphic distribution in embryo transfer flocks used for studying scrapie transmission. Plant, Animal & Microbe Genomes X. P134, p 111.
Wang, S. N. E. Cockett, J.M. Miller, T.L. Shay, A. Maciulis, D.L. Sutton, W.C. Foote, G.R. Holyoak, R.C. Evans, T.D. Bunch. J.E. Beever, J.W. Call, W.D. Taylor and M.R. Marshall. 2002. Polymorphic distribution of the ovine prion protein (PRP) gene in scrapie-infected sheep flocks in which embryo transfer was used to circumvent the transmissions of scrapie. Theriogenology. 57:1865-1875.
UNIVERSITY OF THE VIRGIN ISLANDS AGRICULTURAL EXPERIMENT STATION
Journal Articles:
Godfrey, R.W. 2002. Barbados Blackbelly Sheep. In: Animal Health and Production Compendium. Wallingford, UK: CAB International.
Panitz, E., R. W. Godfrey and R.E.Dodson 2002 Resistance to Ivermectin and effect of topical Eprinomectin on faecal egg counts in St. Croix White hair sheep. Vet. Res. Com. 26:443-446.
Abstracts:
Godfrey, R.W., Dodson, R.E. and A.J. Weis. 2002. The effect of flushing hair sheep ewes during the dry season in the tropics. J. Anim. Sci. 80(Suppl. 2):31.
Henry, D.M. and R.W. Godfrey. 2002. Evaluation of a laser thermometer for measuring the internal scrotal temperature of hair sheep rams. J. Anim. Sci. 80(Suppl. 2):31
Godfrey, R.W., Weis, A.J. and R.E. Dodson. 2002. Performance of St. Croix White and Dorper x St. Croix White lambs from birth to weaning in the tropics. J. Anim. Sci. 80(Suppl. 1):405.
North Dakota State University
Proceedings and Reports
Dahl, J.D., K. K. Sedivec, T. C. Faller, J. F. Karn, P.E. Nyren, and J. Olson. 2003. Effects of multi-species grazing on leafy spurge infested rangeland using twice-over and season-long grazing treatments. (A seven year summary). P. 18-24 In: Proc Western Dakota Sheep Day. N.D. State Univ. Hettinger Res. Ext Center. Rep. No. 43 Hettinger.
Dahl, J.D., K. K. Sedivec, T. C. Faller, J. F. Karn, P. E. Nyren, and J. Olson 2003. Multi-species grazing and single species grazing on leafy spurge infected rangeland. (A seven year summary). P. 25-32 In: Proc. Western Dakota Sheep Day. N.D. State Univ. Hettinger Res. Ext. Center Rep. No. 43 Hettinger.
Poland W. C., T. C. Faller, and L. Tisor. 2003. Effects of chickling vetch (Lathyrus sativus L.) Or alfalfa (Medicago sativus) in gestating ewe diets. P. 33-38 In: Proc. Western Dakota Sheep Day. N.D. State Univ. Hettinger Research Ext. Center. Rep. No. 43 Hettinger.
Faulkner M., K. K. Sedivec, J. Olson, T. C. Faller, J.D. Dahl, and G.P. Lardy 2003, Effects of dormant grazing on herbage production and plant growth. P. 39-50 In: Proc. Western Dakota Sheep Day. N.D. State Univ. Hettinger Research Ext. Center. Rep. No. 43 Hettinger
Faller T. C. , P. T. Berg, and J. D. Dahl 2003. Out of season reproductive potential of western white-faced Rambouillet ewes under North Dakota conditions. P. 56-63 In Proc.
Western Dakota Sheep Day, N.D. State Univ. Hettinger Research Ext. Center. Rep. No. 43 Hettinger.