Candidate Reproductive Genes Do Not Explain Responses in Lines Selected for Ovulation Rate and Litter Size
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منابع مشابه
Candidate gene analysis for loci affecting litter size and ovulation rate in swine.
A candidate gene approach was used to determine whether specific loci explain responses in ovulation rate (OR) and number of fully formed (FF), live (NBA), stillborn, and mummified pigs at birth observed in two lines selected for ovulation rate and litter size compared with a randomly selected control line. Line IOL was selected for an index of OR and embryonic survival for eight generations, f...
متن کاملOvulation rate, lambing rate, litter size and embryo survival of Rambouillet sheep selected for high and low reproductive rate.
Ewes from lines selected for high and low reproductive rate and a control line bred and selected randomly were endoscopically examined 3 to 5 d after breeding to determine ovulation rates in the fall of 1985, 1986 and 1987. Fertility (ewes lambing per ewe exposed), lambing rate (lambs born per ewe exposed) and litter size (lambs born per ewe lambing) were evaluated at lambing in the spring of e...
متن کاملDirect and correlated responses to two-stage selection for ovulation rate and number of fully formed pigs at birth in swine.
Our objectives were to estimate responses and genetic parameters for ovulation rate, number of fully formed pigs at birth, and other production traits following two-stage selection for increased ovulation rate and number of fully formed pigs. Eight generations of selection were practiced in each of two lines. One selection line was derived from a line that previously selected eight generations ...
متن کاملScreening for FecGH Mutation of Growth Differentiation Factor 9 Gene in Iranian Ghezel Sheep Population
Background Ghezel sheep are highly prolific and one of the local sheep breeds in Iran and Turkey. Growth differentiation factor-9 (GDF9) gene has been found to be essential for growth and differentiation of early ovarian follicles. Novel mutations in GDF9 have been associated with increased ovulation rates and high litter sizes in heterozygous carriers. Therefore, fecundity gene for GDF9 (FecGH...
متن کاملChanges in ovulation rate, uterine capacity, uterine dimensions, and parity effects with selection for litter size in swine.
This study was conducted with random samples of pigs of a line (LS) selected for eight generations for litter size and a randomly selected control line (RS) in the Nebraska Gene Pool population and of crosses of these lines with a Large White-Landrace composite line (I) that was selected for an index of ovulation rate and embryonic survival to 50 d of gestation. Two experiments were done to obt...
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تاریخ انتشار 2017