|Department:||Animal & Veterinary Science, UI|
|Credentials:||1999 - PhD., Virginia Polytechnic Institute and State University-Animal Science|
|Office:||Caldwell R&E Center|
|Mailing Address:||Caldwell Research and Extension Center|
University of Idaho
1904 E Chicago St. Suite A-B
Caldwell, Idaho 83605
Dairy research (and Extension) efforts focus on increasing the efficiency of AI in cattle. I am currently investigating 1) Pre-synchronization of dairy heifers to reduce input costs, 2) Heat detection accuracy of AI technicians working with heifers, and 3) Effect of sperm dose on pregnancy rate per timed AI in Brazilian beef cattle. I am also a member of a multi-institution (Washington State University-University of Idaho-University of Florida) team attempting to 1) identify genomic loci associated with fertility in dairy heifers and cows, and 2) transfer technology regarding novel approaches for improving fertility using genetic selection tools.
Research PublicationsDalton, J.C., J.M. DeJarnette, R.G. Saacke, and R.P. Amann, The male component of dairy herd fertility. In: Large Dairy Herd Management, third edition, D.K. Beede (Ed.), American Dairy Science Association, Champaign, IL, 2017, pp. 565-578.
Dalton, J.C., New reproductive strategies and economic outcomes for dairy heifers. In: Proc. Dairy Calf and Heifer Association Annual Conference, Madison, WI, 2017, pp. 59-64.
Dalton, J.C., Factors affecting fertility of conventional and sexed semen. In: Proc. Applied Reproductive Strategies in Beef Cattle, Des Moines, IA, 2016, pp. 184 - 196.
Dalton, J.C., D.A. Moore, T.E. Spencer, P.J. Hansen, J.B. Cole, and H. Neibergs, Genetics, genomics, and fertility. In: Proc. Society for Theriogenology Annual Meeting, Asheville, NC, Clinical Theriogenology, 2016. 8:3: 165.
Dalton, J.C., D.A. Moore, T.E. Spencer, P.J. Hansen, J.B. Cole, and H. Neibergs, Genomic selection and reproductive efficiency in dairy cattle. In: Proc. Dairy Cattle Reproduction Council Annual Meeting, Buffalo, NY, 2015, pp. 10-14.
Lopes, Jr., G., C.R. Johnson, L.G.D. Mendonca, P.B. Silva, J.G.N. Moraes, A. Ahmadzadeh, J.C. Dalton, and R.C. Chebel, Evaluation of reproductive and economic outcomes of dairy heifers inseminated at induced estrus or at fixed time after a 5-day or 7-day progesterone insert-based ovulation synchronization protocol. J Dairy Sci, 2013. 96:1612–1622.
Johnson, C.R., M.W. Ayers, A. Ahmadzadeh, B. Shafii, S. Etter, R.C. Chebel, and J.C. Dalton, Short Communication: Characterization of early postpartum estrous behavior and ovulation in lactating dairy cows using radiotelemetry. J Dairy Sci, 2013. 95: p. 5085-88.
Dalton, J.C., L. Deragon, J.L.M. Vasconcelos, C.N. Lopes, R.F.G. Peres, and A. Ahmadzadeh, Fertility-associated antigen on Nelore bull sperm and reproductive outcomes following first-service fixed-time AI of Nelore cows and heifers. Theriogenology, 2012. 77: p. 389–94.
Dalton, J.C. Strategies for success in heat detection and artificial insemination. In: WCDS Advances in Dairy Technology, 2011. 23: p. 215-29.
Dalton, J.C., and A. Ahmadzadeh. 2010. AI technician management. In: Proc. Dairy Cattle Reproduction Council Annual Meeting, Minneapolis, MN, pp. 35-43.
Dalton, J.C., and A. Ahmadzadeh, Heat detection accuracy and AI technician evaluation. In: Proc. 9th Western Dairy Management Conference, Reno, NV, 2009, pp. 117-29.
Ahmadzadeh, A., F. Frago, B. Shafii, J.C. Dalton, W.J. Price, and M.A. McGuire, Effect of clinical
mastitis and other diseases on reproductive performance of Holstein cows. Anim Reprod Sci, 2009. 112(3-4): p. 273-82.
Stevenson, J.L., J.A. Rodrigues, F.A. Braga, S. Bitente, J.C. Dalton, J.E.P. Santos, and R.C. Chebel,
Effect of reproductive protocols and reproductive tract score on reproductive performance of dairy heifers and economic outcome of breeding programs. J Dairy Sci, 2009. 91: p. 3424–38.
Johnson, C.R., A. Ahmadzadeh, K.S. Jensen, S. Etter, R. Wilson, N. Dalton, and J.C. Dalton, Effect of
duration of intravaginal progesterone insert (CIDR) treatment on pregnancy rate per AI in dairy heifers using a timed-AI protocol. In: Proceedings of the Western Section of the American Society of Animal Science, Laramie, WY, J Anim Sci, 2008, 59: p. 33-36.
Stevenson, J.L., J.C. Dalton, J.E. Santos, R. Sartori, A. Ahmadzadeh, and R.C. Chebel, Effect of
synchronization protocols on follicular development and estradiol and progesterone concentrations of dairy heifers. J Dairy Sci, 2008. 91(8): p. 3045-56.
Chebel, R.C., F.A. Braga, and J.C. Dalton, Factors affecting reproductive performance of Holstein
heifers. Anim Reprod Sci, 2007. 101(3-4): p. 208-24.
Howard, J.M., R. Manzo, J.C. Dalton, F. Frago, and A. Ahmadzadeh, Conception rates and serum
progesterone concentration in dairy cattle administered gonadotropin releasing hormone 5 days after artificial insemination. Anim Reprod Sci, 2006. 95(3-4): p. 224-33.
Sellars, C.B., J.C. Dalton, R. Manzo, J. Day, and A. Ahmadzadeh, Time and incidence of ovulation and
conception rates after incorporating estradiol cypionate into a timed artificial insemination protocol. J Dairy Sci, 2006. 89(2): p. 620-6.
Dalton, J.C., R. Manzo, A. Ahmadzadeh, B. Shafii, W.J. Price, and J.M. DeJarnette, Short
communication: Conception rates following detection of estrus and timed AI in dairy cows synchronized using GnRH and PGF2alpha. J Dairy Sci, 2005. 88(12): p. 4313-6.
Dalton, J.C., A. Ahmadzadeh, B. Shafii, W.J. Price, and J.M. DeJarnette, Effect of simultaneous
thawing of multiple 0.5-mL straws of semen and sequence of insemination on conception rate in dairy cattle. J Dairy Sci, 2004. 87(4): p. 972-5.