[Objective] This study was to investigate the genetic parameters on reproduction performances of China Yorkshire line SⅡ1.[Method] Using China Yorkshire line SⅡ1 as experimental animal,its genetic parameters on reproduction performance,such as total number of born (TNB),the alive number of born (ANB),the litter weight of born (LWB) and the litter weight at age of 21 days (LW21),were estimated by using the DFREML method of multi-traits animal model.[Result] The heritability estimates of TNB,ANB,LWB and LW21 were 0.11,0.19,0.14 and 0.05,respectively;and the genetic correlations between the traits as TNB/ANB,TNB/LWB,TNB/LW21,ANB/LWB,ANB/LW21,LWB/LW21 were 0.91,0.76,0.65,0.85,0.59 and 0.38,respectively.[Conclusion] Main genetic parameters of reproduction traits in China Yorkshire line SⅡ1 have all reached or even exceeded the requirements of breeding.
展开▼
