Genetic variation in litter size and kit survival of mink (Neovison vison).

摘要: The aims of this study are to estimate variance components litter size and kit survival rate genetic correlations with dam's juvenile body weight pregnancy length. Variance for were analysed using an AI-REML approach, based on data from 1940 litters the black colour type mink 1996 2001. models included (i) additive effect dam; (ii) dam sire effects; (iii) in relation effects rate; (iv) or length yearling dams (1357 litters). heritabilities (0.02-0.08) (0.05-0.10). permanent important (0.15-0.19) but not rate. A positive correlation between was found at 1 week postpartum (0.42), a number weaned kits age 6 month (0.72). Litter genetically antagonistically related (-0.34 -0.53). These results indicate following: it is possible improve by selection, effective improvement suckling period requires selection maternal kit's own capacity survive later growth ability antagonistic should be taken into consideration breeding programs.