The heritabilities of both serum AKP activity at 8-wk (8-SAAW) and of egg production at 300 -days(300-EPD)and their genetic correlation were 0.62, 0.20 and 0.8245, respectively.

• 8周龄血清碱性磷酸酶(AKP)活性与300日龄产蛋量间的遗传相关为0.；8245。