The estimated heritability was 0.251 for birth type and 0.097 for number of lambs born alive. The genetic, phenotypic and environmental correlations between birth type and number of lambs born alive were 0.241, 0.008 and 0.181, respectively.

• 湖羊母羊出生类型与产活羔数的遗传力分别为0.；251和0