Keywords Pacific oysters;Diploid;Triploid;nuclear size;gill;spermatozoa of tetraploid;ultrastucture;gonad;adductor muscle;biochemical composition;glycogen metabolism;breeding;

• 太平洋牡蛎;二倍体;三倍体;细胞核大小;鳃;四倍体精子;超微结构;性腺;闭壳肌;生化成分;糖原代谢;繁殖;