Study on the Correlation between OPAY02 Marker and Early Performance in Xiaoshan and Its Hybrid Offspring
wang sheng-cun~1; wang jin-yu~1; dai guo-jun~1; chu ming-xing~2; chen kuan-wei~3; zhang xue-yu~3; wang ke-hua~3 ( 1. ani sci and tech coll; yangzhou univ; yangzhou; 225009; china; 2. inst of ani sci; china acad of agric sci; beijing 100094; china; 3. inst of poul sci; china acad of agric sci; yangzhou; 225003; china)