Method for constructing tongue sole families and breeding superior families

Abstract

The invention relates to a method for constructing tongue sole families and breeding good families, which comprises the technical content of breeding a tongue sole group, constructing the tongue sole families and screening a disease-resistant family and a fast growing family of tongue sole. The method comprises the following steps of: constructing the families through the group breeding and intraspecific hybridization technology; then, screening out the family resisting vibrio anguillarum disease from a large amount of family by an artificial infection approach, and screening out the fast growing family by growth comparison. The fries in the good families can be directly popularized and applied, or used for breeding a high-yield and disease-resistant good strain of tongue sole. The invention has the characteristics of strong pertinence, high breeding efficiency, obvious effect and the like. The established method for screening good tongue sole families provides a new technical approach for breeding the high-yield and disease-resistant good strain of tongue sole. The method is suitably popularized and applied to other cultured fishes, and has important significance and application value for breeding high-yield and disease-resistant strains of the cultured fishes.

Description

Technical field: [0001] The invention belongs to a breeding method for fine fish species in the field of aquaculture, and is a family construction and breeding method that can be applied in the breeding of fine lines of semi-smooth tongue sole. Background technique: [0002] Semi-smooth tongue sole (Cynoglossus semiliaevis) is a kind of precious economic marine fish unique to my country. It belongs to offshore warm-water demersal fish. It is distributed along the coast of my country, mostly in the Yellow Sea and Bohai Sea. Semi-smooth tongue sole is very popular among consumers due to its delicious taste, tender meat and rich nutrition. Its market value is extremely high and its breeding prospect is very broad. Semi-smooth tongue sole is currently one of the main species of marine fish farming. Its aquaculture output is currently nearly 10,000 tons, and the price is expensive. The market price reaches about 200 yuan / 1000 g. The current annual output value of the semi-smooth tongu...

AI Technical Summary

Problems solved by technology

However, it is difficult to solve the problems of germplasm degradation and frequent disease occurrence in tongue sole with these technologies, and family selection is one of the main means of breeding disease-resistant and high-yielding varieties

But so far, there have been no reports on the establishment of tongue sole families and the selection of excellent families with rapid growth and strong disease resistance

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