Sire and Genotype Effects on Survival of Transferred Ovine Embryos
نویسندگان
چکیده
Two flocks of ewes were used as sources of embryos for embryo transfer programs: a Merino flock comprising 3 lines differentially selected on weaning weight and a Coopworth flock consisting of three lines differentially selected for backfat thickness. Effects of embryo genotype, year of transfer, sire and number of embryos transferred on embryo survival were examined. No significant line or sire effects were found for either flock with a mean survival of 43.2% for directly transferred Merino embryos and 21.9% for frozen Coopworth embryos. Although not significant there was a trend for improved survival with increased number of embryos transferred per recipient.
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