Breeding method of excellent strains of hybrid pelteobagrus fulvidraco resistant to Edwardsiella ictaluri

Abstract

The invention provides a breeding method of excellent strains of hybrid pelteobagrus fulvidraco resistant to Edwardsiella ictaluri.The method comprises the following steps: collecting the pelteobagrusfulvidraco and pelteobagrus vachelli, cultivating till mature, and then reproducing to obtain the fry of purebred pelteobagrus fulvidraco and the pelteobagrus vachelli with different populations; soaking all the fingerlings of the pelteobagrus fulvidraco and the pelteobagrus vachelli with a soaking method according to determined medial lethal concentration of the Edwardsiella ictaluri; performingbreeding on the population resistant to the Edwardsiella ictaluri twice, screening the excellent disease-resistant strains by the survival rate of mixed-cultured fry, respectively cultivating the strains of the pelteobagrus fulvidraco resistant to the Edwardsiella ictaluri, and the pelteobagrus vachelli to sexual maturity, and then producing the hybrid pelteobagrus fulvidraco according to a universal artificial reproduction method of fish. According to the breeding method of the excellent strains of the hybrid pelteobagrus fulvidraco resistant to the Edwardsiella ictaluri, hole-in-head-disease-resisitant parents of the pelteobagrus fulvidraco and the pelteobagrus vachelli can be cultivated, the incidence and mortality of hole-in-head disease in the seedling and culture process are improved, and the survival rate of the culture is improved.

Description

technical field [0001] The invention belongs to the technical field of fish breeding, and in particular relates to a method for breeding an excellent strain of hybrid yellow catfish resistant to Edwardsiella catfish. Background technique [0002] Selective breeding is a traditional fish breeding method, which uses the genetic variation of fish itself to isolate and retain excellent traits, quickly fix and develop excellent variations, and purify and rejuvenate fish species. At present, the theory of selective breeding, hybrid breeding, cell engineering breeding, molecular assisted breeding and genome selective breeding has been adopted at home and abroad. New species have been bred from farmed species such as tilapia, abalone, scallop, oyster, pearl oyster and meretrix meretrix. Using the fish sex control technology assisted by sex-linked genetic markers, the yellow catfish "Quanxiong 1", the all-female California perch "Northern flounder 1" and "Northern flounder 2", and t...

AI Technical Summary

Problems solved by technology

Although all-male fish breeding has recently emerged across the country, the supply of YY super-male fish used in the production of all-male fry is tight and the price is high; and the germplasm is mixed in society, and the detection technology is only in the hands of a few people. It is difficult to carry out DNA detection and identification on all-male parent super-male male fish and all-male seedlings

Therefore, there are great limitations in the market

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