A compound breeding method for improving the growth traits of yellow catfish

Abstract

The invention relates to a complex breeding method for improving a growth trait of Pelteobagrus fulvidraco. The complex breeding method includes the following steps: acquiring high-quality Pelteobagrus fulvidraco and Pelteobagrus vachelli parent library through second generation group breeding; using microsatellite markers to detect Pelteobagrus fulvidraco and Pelteobagrus vachelli parents, selecting parent individuals having the genetic similarity of above 90% as a reproduction group; using female Pelteobagrus fulvidraco as female parents and male Pelteobagrus vachelli as male parents to perform hybrid breeding; and acquiring hybrid Pelteobagrus fulvidraco having the growth speed above 20% faster than common Pelteobagrus fulvidraco, wherein the hybrid Pelteobagrus fulvidraco has both excellent traits of dual parents, an attracting color ( female parents) and fast growth speed ( male parents). The complex breeding method can acquire improved hybrid Pelteobagrus fulvidraco, and has important significance for increasing the unit yield, the breeding benefits, and serving production practice.

Description

technical field [0001] The invention relates to a compound breeding method for improving the growth traits of yellow catfish, which belongs to the field of genetic breeding of yellow catfish. Background technique [0002] Pelteobagrus fulvidraco belongs to Siluriformes, Bagridae, and Pelteobagrus. It is an important aquaculture species in my country. It is widely distributed in the Yangtze River system and is an important species in my country. Demersal small economic fish. Because the meat is delicious, the meat is tender, nutritious, and there are few intermuscular thorns, it can survive for a period of time after leaving water, and it can be marketed fresh. price. Therefore, it has become one of the leading varieties with great breeding prospects in my country. [0003] At present, with the expansion of the breeding scale of the yellow catfish, the fish has begun to show germplasm degradation, smaller growth individuals, and poor stress resistance. A new strain (specie...

AI Technical Summary

Problems solved by technology

The offspring of female yellow catfish and YY super male yellow catfish ("Quanxiong No. 1" yellow catfish) have reached the level of large-scale breeding, but the production cost is too high. The reported female yellow catfish and yellow catfish The offspring of male peltatus vacheronii are thick in size and have an extremely significant growth advantage, but at the same time there are problems of low fertilization rate, high deformity rate and low hatching rate

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