Selective breeding method for distant hybridization offspring between megalobrama amblycephala and ancherythroculter nigrocauda

Abstract

The invention discloses a selective breeding method for distant hybridization offspring between megalobrama amblycephala and ancherythroculter nigrocauda. The method comprises the following steps: A, distant hybridization between megalobrama amblycephala and ancherythroculter nigrocauda: a, selecting a hybridization parent; b, crossbreeding parents: breeding the megalobrama amblycephala and ancherythroculter nigrocauda parents in different pools; c, hybridization induced spawning: selecting May to June in midstream of Yangtze River; d, cross insemination: when the parent fishes are in estrus, respectively hauling nets for fishing, selecting megalobrama amblycephala female fishes and ancherythroculter nigrocauda male fishes, artificially collecting sperms and eggs for dry insemination, and controlling the ratio of the female parent fishes to the male parent fishes to be 1: (1-2); e, hatching the hybridized fertilized eggs: debonding the fertilized eggs by adopting yellow mud or talcum powder slurry, or directly adhering the fertilized eggs to artificial fish nests, putting the fertilized eggs into a flushing type hatching tank or a hatching jar and a hatching loop for hatching, moving out the hatching equipment, and carrying out fry, fingerling and parent fish culture in a pond; and B, breeding hybrid offspring of megalobrama amblycephala and ancherythroculter nigrocauda. The method is easy to implement and simple and convenient to operate, and a new variety of excellent culter amblycephala with high yield, stress resistance, stress resistance and compact scales is obtained.

Description

technical field [0001] The invention belongs to the technical field of selective breeding of distant hybrid offspring of Cyprinidae and subfamily Cyprinidae, and more specifically relates to a method for selective breeding of distant hybrid offspring between bream and red-tailed bream. Background technique [0002] Hybrid breeding refers to the method of crossing individuals of different populations and different genotypes, and breeding homozygous varieties through selection in their hybrid offspring. Hybridization can recombine the genes of the parents to form various types, providing abundant materials for selective breeding. The ideal breeding goal is to combine the excellent genes of the parents that control different traits, or to combine the different genes that control the same trait in the parents. Minor genes are accumulated to produce types that surpass the parents in each trait, so the correct selection of parents and reasonable combination are the keys to the suc...

AI Technical Summary

Problems solved by technology

The growth rate of bream is fast, and the suitable protein content of feed is 32%, which is similar to the suitable protein content (33%) of adult fish of black-tailed bream. Hemorrhagic disease has a great impact and is highly stressful, which has caused problems such as unstable breeding production, increased labor intensity, and increased production costs.

In order to overcome the disadvantages of bream, using the anti-Aeromonas hydrophila and anti-stress characteristics of bream, an excellent new strain was obtained through the distant hybridization of bream and bream. After searching, there are " A method of distant hybridization between bream and red-tailed bream" has been published, and the application number is 201510950545.3. The main defect of this patent application is that the core technologies such as parent selection, parent breeding, and artificial induction of bream have been "one The patent (application number: 200610053442.8, filing date: September 18, 2006) for the cross-breeding method of red bream and bream was published. "A Method for Distant Hybridization and Breeding between Red Clam and Black-tailed Clam" (Application No.: ZL 2013 1 0119287.5, Application Date: April 09, 2013) published

[0006] To sum up, the three patent application numbers are 200610053442.8, 2013 1 0119287.5, and 201510950545.3 respectively. The main problem that exists in common is: only one generation of hybrids is obtained through intergeneric distant hybridization, and better quality is obtained without systematic breeding of hybrid offspring. new species of

[0007] There is no public report or patent application for a selective breeding method for the distant hybrid progenies of the group head bream and the black-tailed red bream.

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