Selective breeding method for disease-resistant superior strains of paralichthys olivaceus

Abstract

The invention relates to a selective breeding method for disease-resistant superior strains of paralichthys olivaceus, which comprises group selective breeding and family selective breeding of the paralichthys olivaceus and is characterized by also comprising molecular marker-assisted selective breeding, manual gynogenesis selective breeding or inbreeding selective breeding of a disease-resistant paralichthys olivaceus family. Multiple kinds of biotechnology such as group selective breeding, intraspecific hybridization, family selective breeding, molecular marker-assisted selective breeding, manual gynogenesis selective breeding, inbreeding and the like is comprehensively adopted; a selective breeding method for the disease-resistant superior strains of marine fishes in China is established for the first time by taking the paralichthys olivaceus as a material; the superior strains of the paralichthys olivaceus of which the vibrio anguillarum resistance is obviously improved are bred; and the breeding survival rate is improved by 20 to 47 percent and the growth rate is improved by over 20 percent. The method opens up a new technical approach for the selective breeding of the disease-resistant strains of the fishes, is suitable for popularization and application to all cultured fishes, has great significance and application value for breeding the disease-resistant superior strains of the cultured fishes, and can generate great economic and social benefits.

Description

technical field [0001] The invention belongs to the field of fish genetics and breeding in the aquaculture industry, and in particular relates to a method for breeding excellent disease-resistant strains of flounder. Background technique [0002] Fish is an important aquaculture species and an important food source for humans. my country is the country with the highest aquaculture production in the world. At present, the annual output of farmed fish has reached more than 20 million tons. In addition to satisfying the domestic market, about 300,000 tons of fish products are exported abroad every year. It is one of the main agricultural products that earn foreign exchange through export. However, with the rapid development of the fish farming industry in recent years, frequent diseases, germplasm degradation, and low survival rate of seedlings have caused economic losses of more than 15 billion yuan per year to the fish farming industry, which greatly limits Development of fi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to establish a breeding method for excellent disease-resistant strains of flounder, make up for the deficiencies in the prior art, provide methods for the cultivation of fish disease-resistant improved varieties, and solve the problem of lack of breeding of disease-resistant excellent strains in aquaculture,

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