Statistical genetic analyses were conducted on the data of 4 populations with 2010 litters including Erhualian pig (P1), Large White(P2), first cross(F1) and backcross(B2).

• 对二花脸猪、大白猪、杂交一代和回交一代四个群体共计2010窝产仔数的资料进行了统计遗传分析。