Ovulation rate records from female progeny of 3 Booroola-type rams and the daughters of 8 to 10 male progeny of the same rams were recorded in commercial flocks. When a segregation criterion of at least 1 record of ovulation rate >/-3 was used to identify carriers of the putative gene, the results support the hypothesis of genetic segregation for fecundity in Booroola sheep. A comparison of the genotype ascertained from progeny tests with that estimated from the parental genotypes showed that 21 of 22 rams' performance was consistent with a single gene effect.

HH, Meyer, WM Aitken, and JE Smeaton

Proceedings of the New Zealand Society of Animal Production, Volume 43, , 189-192, 1983
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