Cyprins carpio yuanjian wu et al. is a local type of Cyprinus carpio rubrofuscus Lacépède. Its morphological features are, head small, body spindle-shape and compressed laterally, greatly convex on dorsal surface, with dark-grey colour on the back. It lives in rivers and lakes on the plateau of subtropical region. The Red Purse Carp is a variety of the commen carp, living in the still waters of the mountainous areas in the basins of the middle and lower parts of Chang Jiang river. The external Features of the fish are head small, body short and high, with a large and fleshy belly, colour reddish orange. It is also a district variety. In 1974, the two types of carps, the Yuangjiang Carp and the Red purse Carp ♀ were artificially crossed and their F_1 hybrids display marked heterosis。 The F_1 hybrids show that the ratio of body length to body depth is from 2.35 to 2.55, higher than than of their parents. Individual hybrids can grow to an average size of about 1,000g within one year (under the condition of polyculture in a density of 30-60 individuals per mu). The growth rate of the hybrid is much higher than that of Red Purse Carp by 52.3%, that of the Yuanjiang Carp by 28.05%, and that of the wild carp in Chang Jiang river by 45.5%. It shows that the difference between the hybrids and its parents is highly significant(P0.001); the fish flesh percentage of the yearling is 77.8% on an average, the fat content in the muscles is 3.68%, the protein content is 18.37%. The adults of the hybrids are easy to be harvested. They also possess many other economical importances, such as high survival rate, diseases resistance and high fertility