Distant hybridization method for megalobrama amblycephala and yellow catfish

Abstract

The invention discloses a method for the distant hybridization of megalobrama amblycephala and xenocypris daviodi bleeker; in the method, diploid megalobrama amblycephala (or xenocypris daviodi bleeker) is taken as the maternal ripe fish, and diploid xenocypris daviodi bleeker (or megalobrama amblycephala) is taken as the paternal ripe fish; fertilized eggs are incubated through the artificial dry fertilization to the maternal ripe fish and the paternal ripe fish; the incubated fry is used to feed, to obtain the hybrid variety of the megalobrama amblycephala and the xenocypris daviodi bleeker. The method of the invention not only improves the fertilization rate and the incubation rate of distant hybridization, and the obtained novel types have the advantages of elegant shape, tender fish, strong stress resistance, etc.; therefore, the method is significant in the research on fish genetic breeding and the theory of biological evolution in future.

Description

technical field [0001] The invention relates to a hybridization method of fish, in particular to a method for distant hybridization between the subfamily of the carps and the subfamily of the subfamily of the carps. Background technique [0002] Distant hybridization refers to the hybridization between individuals of an interspecies or more than one species. At present, distant hybridization technology has become an important method for fish genetic breeding and trait improvement. Distant hybridization can transfer the entire set of foreign genomes into eggs, thereby changing the expression regulation and interaction mode of hybrid offspring genes, so that the offspring may show hybrids in terms of viability, growth potential, stress resistance, yield, and quality. Advantages, but distant hybrids are also prone to the problem that hybrid offspring cannot survive or have a low survival rate. Megalobrama amblycephala (Megalobrama amblycephala) belongs to Cyprinidae, a diploi...

AI Technical Summary

Problems solved by technology

Distant hybridization can transfer the entire set of foreign genomes into eggs, thereby changing the expression regulation and interaction mode of hybrid offspring genes, so that the offspring may show hybrids in terms of viability, growth potential, stress resistance, yield, and quality. Advantages, but distant hybrids are also prone to the problem that hybrid offspring cannot survive or have a low survival rate

Megalobrama amblycephala (Megalobrama amblycephala) belongs to Cyprinidae, a diploid fish (2n=48) in the subfamily Cyprinidae. The diploid fish (2n=48) in the family has the advantages of tender meat and high meat content. These two fish have great differences in biological characteristics such as classification and body shape, so there is a distant hybrid between the two It is quite difficult, and so far there is no report on the successful distant hybridization between the subfamily of Cyprinidae and the subfamily of Cyprinidae.

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