LD and LC had lower hereditability on EW40. The genetic correlation between BW140 and FEA was negative, while LD and LC were positive.

• LD系和LC系40周龄蛋重(EW40)的估计遗传力偏低。 W系140天体重(BW140)和开产日龄负遗传相关，LD系和LC系为正相关。