Purdy, P.H., Blackburn, H.D., Manahan, T.J., Spiller, S.F., Wilson, C.S. 2015. An update on USDA swine gene banking. Meeting Abstract. VIII International Conference on Boar Semen Preservation, Champaign, IL August 9-12, 2015.
Purdy, P.H., Spiller, S.F., Rice, S.D., Koeoke, K.L., Mcguire, E.M., Mcguire, K.E., Stobart, S., Blackburn, H.D. 2014. A preliminary report on the impact of cryopreservation diluent on ram sperm physiology and cervical artificial insemination. Symposium Proceedings. Western Section American Society of Animal Science, June 25-27, 2014, San Angelo, Texas.
Purdy, P.H., Graham, J.K. 2014. Membrane modification strategies for cryopreservation. In: Wolkers, W.F., Oldenhof, H., editors. Cryopreservation and Freeze-Drying Protocls. Third Edition. The Lab Protocol Series Methods in Molecular Biology. Book Chapter. New York: Springer. p. 337-342.
Daigneault, B.W., Mcnamara, K.A., Purdy, P.H., Rodriguez_Zas, S.L., Krisher, R.L., Knox, R.V., Miller, D.J. 2014. Fertility prediction of frozen boar sperm using novel and conventional analyses. Meeting Abstract. Society for the Study of Reproduction, Grand Rapids, MI, July 19-23, 2014.
Daigneault, B.W., Mcnamara, K.A., Purdy, P.H., Krisher, R.L., Knox, R.V., Miller, D.J. 2014. Novel and traditional traits of frozen-thawed porcine sperm related to in vitro fertilization success. Theriogenology. 82:266-273.
Daigneault, B.W., Mcnamara, K.A., Purdy, P.H., Knox, R.V., Krisher, R.L., Miller, D.J. 2013. Post-thaw motility of frozen boar sperm does not predict success with in vitro fertilization. Meeting Abstract. Society for the Study of Reproduction, Montreal, Quebec, Canada, July 22-26, 2013.
Gallegos, A.I., Ericsson, S.A., Blackburn, H.D., Spiller, S.F., Warnock, B.J., Meador, M.K., Smith, M.W., Purdy, P.H. 2013. Effect of storage time on the viability of cryopreserved bovine spermatozoa. Meeting Abstract. American Society of Animal Science, Indianapolis, IN, July 8-12, 2013.
Tarvis, K.M., Purdy, P.H., Graham, J.K. 2012. Effects of alternative cryoprotectants, diluents, straw size and cholesterol addition on cryopreserved rooster sperm. Meeting Abstract. International Congress on Animal Reproduction, Vancouver, BC, Canada, July 29-August 2, 2012.
Silversides, F.G., Purdy, P.H., Blackburn, H.D. 2012. 185 Cost effectiveness of maintaining research chicken populations in situ or with cryopreserved semen or ovaries. Meeting Abstract. Poultry Science Association, Athens, GA, July 9-12.
Silversides, F., Purdy, P.H., Blackburn, H.D. 2013. Comparative costs of programmes to conserve chicken genetic variation based on maintaining living populations or storing cryopreserved material. British Poultry Science. 53:599-607.
Blackburn, H.D., Godke, R., Purdy, P.H., Hiemstra, S., Woelders, H., Mariante, A., Pizzi, F., Boettcher, P. 2012. Cryoconservation of animal genetic resources. Animal Production and Health Guidelines No. 12. Complete Book. FAO, Rome p. 222.
Blackburn, H.D., Paiva, S.R., Wildeus, S., Getz, W., Stobart, R., Bixby, D., Purdy, P.H., Welsh, C.S., Spiller, S.F., Brown, M.A. 2011. Genetic Structure and Diversity among U.S. sheep breeds: Identification of the major gene pools. Journal of Animal Science. 89:2336-2348.
Purdy, P.H. 2011. Sperm quality assessment in mammals by flow cytometry pp. 219-226. In: T.R. Tiersch and C.C. Green (eds.) Cryopreservation in Aquatic Species, 2nd Edition. World Aquaculture Society, Baton Rouge, LA.
Spencer, K.W., Purdy, P.H., Blackburn, H.D., Spiller, S.F., Stewart, T.S., Knox, R.V. 2010. Effect of number of motile frozen-thawed boar sperm and number of fixed-time inseminations on fertility in estrous-synchronized gilts. Animal Reproduction Sciences. 121:259-266.
Purdy, P.H., Tharp, N., Stewart, T., Spiller, S.F., Blackburn, H.D. 2010. Implications of the pH and temperature of diluted, cooled boar semen on fresh and frozen-thawed sperm motility characteristics. Theriogenology. 74:1304-1310.
Purdy, P.H., Moce, E., Stobart, R., Murdoch, W.J., Moss, G.E., Larson, B., Ramsey, S., Graham, J.K., Blackburn, H.D. 2009. The fertility of ram sperm held for 24 hours at 5 ºC prior to cryopreservation. Animal Reproduction Sciences. 118:231-235.
PPurdy, P.H., Blackburn, H.D., Larson, B., Stobart, R. 2009. Investigation of a novel non-surgical method of artificial insemination for sheep. Western section of Amercan Society of animal Science, Fort Collins, CO, June 16-18, 2009.
Tharp, N.E., Purdy, P.H., Blackburn, H.D., Spiller, S.F., Stewart, T. 2009. Influence of pre-cryopreservation pH and temperature on boar semen quality. Midwest Section American Society of Animal Science, Des Moines, IA, March 16-18, 2008.
PPurdy, P.H., Stobart, R.H., Larson, B., Blackburn, H.D. 2009. Evaluation of new techniques to enhance the use of A.I. on farm. American Sheep Industry Association Annual Conference, San Diego, CA, January 21-24, 2009.
Spencer, K., Purdy, P.H., Blackburn, H.D., Spiller, S.F., Welsh, C.S., Stewart, T., Breen, S., Taibl, J., Yantis, B., Knox, R. 2008. Effect of number of motile sperm and number of inseminations using frozen boar semen on fertility in gilts. National Hog Farmer. http://nationalhogfarmer.com/genetics-reproduction/artificial-insemination/1215-boar-semen-use/.
Purdy, P.H., Knox, R., Singleton, W., Spencer, K., Spiller, S.F., Stewart, T., Tharp, N., Welsh, C.S., Blackburn, H.D. 2008. Perspectives on cryopreservation, quality control, and artificial insemination of frozen-thawed boar sperm in a national repository. Symposium Proceedings. Midwest Boar Stud Managers Conference, Saint Louis, MO August 7-8, 2008.
Purdy, P.H. 2008. Detection of boar sperm plasma membrane protein using Rhodamine 640; implications for cryobiology and physiology. American Society of Andrology Meeting, Albuquerque, New Mexico, April 2008. Pp. 49.
Purdy, P.H. 2007. Gene banking: A quality control perspective on collection, and analysis of samples for a national repository. Theriogenology. 6th International Conference on Boar Semen Preservation, Alliston, Ontario, Canada, August 11-15, 2007.
Purdy, P.H. 2004. Effects of holding time prior to freezing on the motility, viability and membrane binding ability of ram sperm. 2004 Joint Annual Meeting of the American Dairy Science Association, American Society of Animal Science and Poultry Science Association, July 26-28, 2004, St. Louis, Missouri. Journal of Animal Science. 82(Suppl 1):367.
Spiller, S.F., Ericsson, S.A., Realivasquez, R., Campbell, W.T., Sterns, K.L., Purdy, P.H., Blackburn, H.D., Dzakuma, J.M. 2004. INHA microsatellite polymorphisms in angora bucks. American Society of Animal Science/American Society of Dairy Science/Poultry Science Association Annual Meeting, July 25-29, 2004, St. Louis, Missouri. Journal of Animal Science 2004. 82(Suppl 1):378.
Purdy, P.H., Ericsson, S.A., Dodson, R.E., Sternes, K.L., Garner, D.L. 2004. Effects of the flavonoids, silibinin and catechin, on the motility of extended cooled caprine sperm. Small Ruminant Research. 55:239-243.