Sherrill E Echternkamp
Reproduction Research
Research Physiologist (Animals)
Phone: (402) 762-4183
Fax: (402) 762-4382
U.S. MEAT ANIMAL RESEARCH CENTER
SPUR 18D CLAY CENTER, NE, 68933-0000
Allan, M.F., Kuehn, L.A., Cushman, R.A., Snelling, W.M., Echternkamp, S.E., Thallman, R.M. 2009. Confirmation of quantitative trait loci using a low-density single nucleotide polymorphism map for twinning and ovulation rate on bovine chromosome 5. Journal of Animal Science. 87(1):46-56.
Echternkamp, S., Cushman, R., Spicer, L. 2008. Comparisons of mRNA expression for aromatase, FSH receptor, and IGF-I in the granulosa of small ovarian follicles between cattle selected and unselected for twin ovulations [abstract]. Biology of Reproduction. Special Issue:81 (Abstract #123).
Aad, P., Spicer, L., Echternkamp, S. 2008. The hedgehog system in ovarian follicles of cattle selected for twin ovulations and births: Evidence of a link between the IGF and hedgehog systems [abstract]. Biology of Reproduction. Special Issue:109-110 (Abstract #242).
Cushman, R., Miles, J., Allan, M., Kuehn, L., Echternkamp, S., Freetly, H. 2008. Relationship of antral follicle counts to fertility and ovarian AMH mRNA levels in beef cows [abstract]. Biology of Reproduction. Special Issue:224 (Abstract #722).
Aad, P.Y., Echternkamp, S.E., Spicer, L.J. 2008. Evidence for possible involvement of IGF type II receptors (IGF2R) in regulating growth of two concomitant dominant follicles in cattle [abstract]. Journal of Animal Science. 86 (E-Supplement 3):10 (Abstract #38).
Echternkamp, S.E., Cushman, R.A., Allan, M.F., Thallman, R.M., Gregory, K.E. 2007. Effects of ovulation rate and fetal number on fertility in twin-producing cattle. Journal of Animal Science. 85(12):3228-3238.
Cushman, R., Echternkamp, S., Allan, M., Freetly, H. 2007. Identification of indicator traits of fertility in the postpartum beef cow [abstract]. Biology of Reproduction. Special Issue:187-188.
Echternkamp, S.E., Cushman, R.A., Allan, M.F. 2007. Increasing ovulation rate reduced follicle size and increased blood progesterone concentrations but had no effect on fertility in cattle selected for twins [abstract]. Journal of Animal Science. 85 (Supplement 1):649. (Abstract #886)
Allan, M.F., Thallman, R.M., Cushman, R.A., Echternkamp, S.E., Kuehn, L.A., Snelling, W.M. 2007. Fine mapping of QTL for twinning and ovulation rate using low density SNP map in conjunction with microsatellite marker information in the USMARC twinning population [abstract]. Plant & Animal Genome XV Conference. Poster No. 521. p. 231.
Allan, M.F., Thallman, R.M., Cushman, R.A., Echternkamp, S.E., White, S.N., Kuehn, L.A., Casas, E., Smith, T.P. 2007. Association of a single nucleotide polymorphism in spp1 with growth traits and twinning in a cattle population selected for twinning rate. Journal of Animal Science. 85(2):341-347.
Roberts, A.J., Al-Hassan, M.J., Fricke, P.M., Echternkamp, S.E. 2006. Large variation in steroid concentrations and insulin-like growth factor binding proteins exists among individual small antral follicles collected from within cows at various stages of estrous cycle. Journal of Animal Science 84:2714-2724.
Cushman, R.A., Allan, M.F., Jones, S.A., Rupp, G.P., Echternkamp, S.E. 2007. Localization of Period 1 mRNA in the ruminant oocyte and investigations of its role in ovarian function. Animal Reproduction Science. 99(1-2):93-105.
Echternkamp, S.E., Cushman, R.A., Allan, M.F. 2006. Relationship of circulating progesterone concentrations to ovulation rate and fertility in cattle selected for twin ovulations [abstract]. Biology of Reproduction. (Supplement):139. (Abstract #301)
Aad, P.Y., Echternkamp, S.E., Spicer, L.J. 2006. IGF type II receptor gene expression in granulosa and theca cells of cattle selected for twin ovulations and births. Biology of Reproduction. (Supplement):173. (Abstract #454)
Echternkamp, S.E., Cushman, R.A., Allan, M.F. 2006. Effects of ovulation rate and fetal number on fertility in twin-producing cattle [abstract]. Journal of Animal Science. 84 (Supplement 1):152. (Abstract #209)
Cushman, R.A., Allan, M.F., Jones, S., Rupp, G.P., Echternkamp, S.E. 2006. Localization of Period 1 mRNA in the ruminant oocyte and investigations of its role in ovarian function [abstract]. Journal of Animal Science. 84 (Supplement 1):452-453. (Abstract #641)
Bennett, G.L., Allan, M.F., Cushman, R.A., Echternkamp, S.E. 2006. Observed and predicted numbers of single, twin, and triplet births in a cattle population selected for increased twinning [abstract]. Journal of Animal Science 84(Suppl. 1):203.
Echternkamp, S.E., Green, J.A., Vonnahme, K.A., Cushman, R.A., Allan, M.F. Relationship between concentrations of pregnancy-associated glycoproteins (PAG) in maternal blood and fetal number and status in pregnant cows. Journal of Animal Science. 84(Supplement 2):127. (Abstract #301)
Imakawa, I., Kim, M.-S., Matsuda-Minehata, F., Ishida, S., Iizuka, M., Suzuki, M., Chang, K.-T., Echternkamp, S.E., Christenson, R.K. 2006. Regulation of the ovine interferon-tau gene by a blastocyst-specific transcription factor, Cdx2. Molecular Reproduction and Development. 73(5):559-567.
Cushman, R., Allan, M., Christenson, R., Echternkamp, S. 2006. Comparison of fertility, luteal characteristics, and luteal function between unilateral and bilateral double ovulations [abstract]. Journal of Animal Science. 84 (Supplement 2):127. (Abstract #300)
Imakawa, K., Imai, M., Sakai, A., Suzuki, M., Nagaoka, K., Sakai, S., Lee, S.-R., Chang, K.-T., Echternkamp, S.E., Christenson, R.K. 2006. Regulation of conceptus adhesion by endometrial CXC chemokines during the implantation period in sheep. Molecular Reproduction and Development. 73(7):850-858.
Cushman, R.A., Allan, M.F., Snowder, G.D., Thallman, R.M., Echternkamp, S.E. 2005. Evaluation of ovulation rate and ovarian phenotype in puberal heifers from a cattle population selected for increased ovulation rate. Journal of Animal Science. 83(8):1839-1844.
Ishida, S., Matsuda-Minehata, F., Qin, J., Iizuka, M., Manabe, N., Echternkamp, S.E., Christenson, R., Imakawa, K. 2005. Regulation of ovine interferon-tau gene by a blastocyst specific transciption factor, CDX-2 [abstract]. Biology of Reproduction. (Supplement):93. (Abstract #54)
Echternkamp, S.E., Cushman, R.A., Christenson, R. 2005. Increased mRNA expression for FSH receptor in small antral follicles in the ovarian cortex of twin-producing cattle [abstract]. Biology of Reproduction. (Supplement):93. (Abstract #53)
Cushman, R.A., Allan, M.F., Christenson, R., Echternkamp, S.E. 2005. Differential gene expression in the ovarian cortex of cows selected for multiple ovulations [abstract]. Biology of Reproduction. (Supplement):188. (Abstract #W483)
Echternkamp, S., Vonnahme, K., Ford, S. 2005. Comparison of circulating concentrations of vascular endothelial growth factor (VEGF) between cows gestating single and twin ovulations [abstract]. Journal of Animal Science. 83 (Supplement 2):86.
Cushman, R.A., Allan, M.F., Snowder, G.D., Thallman, R.M., Echternkamp, S.E. 2005. Evaluation of ovulation rate and ovarian phenotype in puberal heifers from a cattle population selected for multiple births [abstract]. Journal of Animal Science. 83 (Supplement 2):86-87.
Snowder, G.D., Cushman, R.A., Allan, M.F., Thallman, R.M., Echternkamp, S.E. 2005. Heritability estimate for bilateral ovulation in heifers [abstract]. Midwestern Section of the American Society of Animal Science 83(2):39.
Roberts, A.J., Echternkamp, S.E. 2004. Associations among changes in estrogen concentrations in the first wave dominant follicle and steroid concentrations in other antral ovarian follicles in beef cows [abstract]. Biology of Reproduction. 70 (Supplement):135. (Abstract #184)
Echternkamp, S.E., Cushman, R.A., Christenson, R.K. 2004. Effect of ovulation rate on development of the ovine corpus luteum [abstract]. Journal of Animal Science. 82 (Supplement 1):67. (Abstract #M266)
ECHTERNKAMP, S.E., ROBERTS, A.J., LUNSTRA, D.D., WISE, T.H., SPICER, L.J. 2004. OVARIAN FOLLICULAR DEVELOPMENT IN CATTLE SELECTED FOR TWIN OVULATIONS AND BIRTHS. JOURNAL OF ANIMAL SCIENCE. v. 82(2). p. 459-471.
POTTS, J.K., ECHTERNKAMP, S.E., SMITH, T.P., REECY, J.M. 2003. CHARACTERIZATION OF GENE EXPRESSION IN DOUBLE-MUSCLED AND NORMAL-MUSCLED BOVINE EMBRYOS. ANIMAL GENETICS. v. 34(6). p. 438-444.
Roberts, A.J., Echternkamp, S.E. 2003. Insulin-like growth factor binding proteins in granulosa and thecal cells from bovine ovarian follicles at different stages of development. Journal of Animal Science. 81(11):2826-2839.
ECHTERNKAMP, S.E., THALLMAN, R.M., KAPPES, S.M., GREGORY, K.E. INCREASED TWINNING AND COW PRODUCTIVITY IN BEEF CATTLE SELECTED FOR OVULATION AND TWINNING RATE. PROCEEDINGS OF 7TH WORLD CONGRESS OF GENETICS APPLIED IN LIVESTOCK PRODUCTION. 2002. SESSION 08, REPRODUCTION. CD-ROM COMMUNICATION NO. 08-12