Publications (Clicking on the reprint icon will take you to the publication reprint.)

Boar sperm quality in lines of pigs selected for either ovulation rate or uterine capacity - (Peer Reviewed Journal)

Freking, B.A., Purdy, P.H., Spiller, S.F., Welsh, C.S., Blackburn, H.D. 2012. Boar sperm quality in lines of pigs selected for either ovulation rate or uterine capacity. Journal of Animal Science. 90(8):2515-2523.

Genetic diversity of Ovis aries populations near domestication centers and in the new world - (Peer Reviewed Journal)

Blackburn, H.D., Toishibekov, Y., Toishibekov, M., Welsh, C.S., Spiller, S.F., Brown, M.A., Pavia, S. 2011. Genetic diversity of Ovis aries populations near domestication centers and in the new world. Genetica. 139:1169-1178.

Genetic Structure and Diversity among U.S. sheep breeds: Identification of the major gene pools. - (Peer Reviewed Journal)

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.

Effect of number of motile frozen-thawed boar sperm and number of fixed-time inseminations on fertility in estrous-synchronized gilts - (Peer Reviewed Journal)

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.

Implications of the pH and temperature of diluted, cooled boar semen on fresh and frozen-thawed sperm motility characteristics - (Peer Reviewed Journal)

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.

Comparison of Genetic Diversity Between US and Kazak Sheep Breeds. - (Abstract Only)

Blackburn, H.D., Toishibekov, Y., Toishibekov, M., Welsh, C.S., Spiller, S.F., Brown, M. 2009. Comparison of Genetic Diversity Between US and Kazak Sheep Breeds. Journal of Animal Science 87:401. Annual meeting of the American Society of Animal Science, July 13-17, 2009. Montreal Canada.

Influence of pre-cryopreservation pH and temperature on boar semen quality - (Abstract Only)

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.

Effect of number of motile sperm and number of inseminations using frozen boar semen on fertility in gilts - (Trade Journal)

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/.

Perspectives on cryopreservation, quality control, and artificial insemination of frozen-thawed boar sperm in a national repository - (Proceedings)

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.

Genetic Diversity of US Sheep Breeds - (Abstract Only)

Blackburn, H.D., Brown, M., Wildeus, S., Stobart, R., Bixby, D., Dzakuma, J., Ericsson, S., Getz, W., Cockett, N., Matsas, D., Welsh, C.S., Spiller, S.F. 2008. Genetic Diversity of US Sheep Breeds. Meeting Abstract.

Boar fertility and semen quality characteristics in lines of pigs selected for component traits of female reproduction - (Abstract Only)

Freking, B.A., Purdy, P.H., Welsh, C.S., Spiller, S.F., Blackburn, H.D. 2008. Boar fertility and semen quality characteristics in lines of pigs selected for component traits of female reproduction [abstract]. Journal of Animal Science Supplement. 86(E-Suppl. 2):208-209. Abstract #W50.

VARIATION IN SPERM CELL QUALITY IN CRYOPRESERVED BOAR SEMEN - (Peer Reviewed Journal)

Stewart, T., Gunsett, F., Welsh, C.S., Spiller, S.F., Purdy, P.H., Blackburn, H.D. 2006. Variation in sperm cell quality in cryopreserved boar semen. 8th World Congress of Genetics Applied in Livestock Production. 11(23):1-4.