Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Sherrill E. Echternkamp"'
Publikováno v:
Domestic Animal Endocrinology. 45:187-195
Abundance of IGF-2 receptor (IGF2R), FSH receptor (FSHR), and LH receptor (LHCGR) mRNA in granulosa cells (GCs) or theca cells (TCs) or both cells as well as estradiol (E2), progesterone (P4), and androstenedione concentrations in follicular fluid we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7889156f9831ca320da3ee9404fc84f8
https://doi.org/10.1016/j.domaniend.2013.09.001
https://doi.org/10.1016/j.domaniend.2013.09.001
Publikováno v:
Journal of Animal Science. 91:4168-4179
Programs for developing replacement heifers are designed for heifers to calve at 2 yr of age and to extend their stayability in the herd and minimize feed cost. The experimental objective was to determine whether developing prepubertal heifers on les
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01a71e04b216615c8c5ed9f3a7fa87fe
https://doi.org/10.2527/jas.2012-5877
https://doi.org/10.2527/jas.2012-5877
Autor:
Tara G. McDaneld, Larry A. Kuehn, Robert A. Cushman, Lea A. Rempel, Carol G. Chitko-McKown, Jeremy R. Miles, D. J. Nonneman, Sherrill E. Echternkamp
Publikováno v:
Journal of Animal Science. 91:2640-2646
A proposed functional polymorphism in the ionotropic glutamate receptor AMPA1 (GRIA1) has been reported to influence antral follicle numbers and fertility in cows. Repeat breeder cows that fail to produce a calf in multiple seasons have been reported
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::492f0e2c06082ab4b672da9707298b1e
https://doi.org/10.2527/jas.2012-5950
https://doi.org/10.2527/jas.2012-5950
Publikováno v:
Journal of Animal Science. 90:2193-2200
Cattle genetically selected for twin ovulations and births (Twinner) exhibit increased ovarian follicular development, increased ovulation rate, and greater blood and follicular fluid IGF-1 concentrations compared with contemporary cattle not selecte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d71e5aa6c0bde16cc356fc3c02d3abc6
https://doi.org/10.2527/jas.2011-4735
https://doi.org/10.2527/jas.2011-4735
Publikováno v:
Journal of Animal Science. 89:3060-3068
Application of AI in extensive beef cattle production would be facilitated by protocols that effectively synchronize ovarian follicular development and ovulation to enable fixed-time AI (TAI). The objectives were to determine whether use of a control
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efbb63e9bccba74af68942d5bd7a8f91
https://doi.org/10.2527/jas.2010-3549
https://doi.org/10.2527/jas.2010-3549
Publikováno v:
Journal of Animal Science. 87:3556-3568
Long-term genetic selection of cattle for fraternal twins has increased the frequency of twin and triplet ovulations. In contrast, the ratio of fetal numbers to ovulation sites in pregnant females with twin (0.83) or triplet (0.73) ovulations is or =
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b202d8db7fdf8137467ade7755514863
https://doi.org/10.2527/jas.2009-2049
https://doi.org/10.2527/jas.2009-2049
Autor:
Warren M Snelling, Larry A. Kuehn, Robert A. Cushman, Sherrill E. Echternkamp, R. M. Thallman, M. F. Allan
Publikováno v:
Journal of Animal Science. 87:46-56
Traditional genetic selection in cattle for traits with low heritability, such as reproduction, has had very little success. With the addition of DNA technologies to the genetic selection toolbox for live- stock, the opportunity may exist to improve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39231a0bd949b3815075d0129418b39f
https://doi.org/10.2527/jas.2008-0959
https://doi.org/10.2527/jas.2008-0959
Publikováno v:
Journal of Animal Science. 85:3239-3248
The effects of increasing fetal numbers and their distribution between the left and right uterine horns on calf survival, calf BW at birth and weaning, gestation length, dystocia, and calf sex ratio were evalu- ated for single (n = 1,587), twin (n =
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b681ba8edb8d47b88fa0e6350917dee
https://doi.org/10.2527/jas.2007-0210
https://doi.org/10.2527/jas.2007-0210
Publikováno v:
Animal Reproduction Science. 99:93-105
The clock gene Period 1 (Per1) may be a prolificacy gene, because it localized to the mouse oocyte and Per1-null drosophila shed fewer eggs. Because Per1 mapped to a region of mouse chromosome 11 syntenic to bovine chromosome 19 where a quantitative
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::275899a8c8b0263066506477cd13031a
https://doi.org/10.1016/j.anireprosci.2006.04.057
https://doi.org/10.1016/j.anireprosci.2006.04.057
Autor:
Robert A. Cushman, Larry A. Kuehn, R. M. Thallman, Eduardo Casas, Sherrill E. Echternkamp, Stephen N. White, M. F. Allan, Timothy P. L. Smith
Publikováno v:
Journal of Animal Science. 85:341-347
Continued validation of genetic mark- ers for economically important traits is crucial to estab- lishing marker-assisted selection as a tool in the cattle industry. The objective of the current study was to eval- uate the association of a SNP (T9/T10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a26e25e86b6a87953792e1db5dbfe416
https://doi.org/10.2527/jas.2006-460
https://doi.org/10.2527/jas.2006-460