Morphometric variations analysis of Cyprinus carpio var. jian, Cyprinus carpio haermatopterus and the reciprocal F_1 hybrids (Cyprinus carpio var. jian♀×Cyprinus carpio haermatopterus♂, Cyprinus carpio var. jian♂×Cyprinus carpio haermatopterus♀)

The morphological variations between common carp Cyprinus carpio var. jian, Cyprinus carpio haermatopterus and the reciprocal F1 hybrids(Cyprinus carpio var. jian♀×Cyprinus carpio haermatopterus♂, and Cyprinus carpio var. jian♂×Cyprinus carpio haermatopterus♀) were studied by variance analysis and by three methods of multivariate analysis, based on their morphological characters. There were no significant differences among four groups based on the number of scales on the lateral line, scales above the lateral line, scales beneath the lateral line, spines of pectoral fins and ventral fin(P0.05) except for the number of spines of the dorsal fin, anal fin, and soft rays of the dorsal fin, anal fin, ventral fin and pectoral fins. The cluster results showed that the morphological traits were similar between the parent fish stocks, but quite different from those of the reciprocal F1 hybrids. The discriminant functions of the four stocks were established, and the discriminatory accuracies were 76.7%–96.7%(P1)and 85.2%–90.6%(P2).The total discriminatory accuracy was 87.5%. In the principal component analysis, nine principal components were constructed, and the cumulative contributory ratio was 68.94%. The study would be beneficial for identifying groups, and for determining genetic relationships and breeding.