Method for breeding golden yellow snakeheads

Abstract

The invention discloses a method for breeding golden yellow snakeheads. Mutant genes of golden yellow snakehead individuals formed by body color variation are fixed in a continuous inbreeding manner;and breeding is performed after 3-4-generation breeding. The method comprises the steps of parent selection and breeding; population-closing sub-generation breeding, wherein the golden yellow individuals with the body color variation are positively and negatively mated with the snakeheads with the same variant body colors to breed paternal and maternal lines; selecting the golden yellow individuals from offsprings of the paternal and maternal lines to be mated, and taking the individuals with the consistent body colors as a new variety or a strain breeding 0 generation; adopting a random mating mode of avoiding sib mating for offsprings of the 0 generation, and selecting and remaining the male and female snakeheads with determination indexes meeting the seed selection requirements and theconsistent variant body colors as next generation parents; and carrying out expanding propagation and popularization. The method overcomes the defects of single and relatively black body color, smallpopulation, low fertilization rate, high death rate and weak disease resistance of existing common snakehead varieties; and a foundation is laid for future development of other new snakehead variety breeding, and materials are provided for body color related genetic engineering research.

Description

technical field [0001] The invention relates to snakeheads, in particular to a breeding method for golden-yellow snakeheads. Background technique [0002] Snakehead is a kind of economic fish popular with the masses. Its meat is tender and thornless, delicious, rich in nutrition, high in protein content, and also contains various nutrients such as fat, calcium, phosphorus, iron, and ash. [0003] The existing black snakehead is commonly known as black fish, and it is in the shape of a long stick. The head is flat, the head is large, and the mouth is large. The snout is round. There are many teeth in the mouth. The even fins are small, the dorsal and anal fins are extra long, and the caudal fin is round. Both the head and torso are covered with scales of similar size. Lateral line intact, with a curve behind the pectoral fin. There are many small sensory holes on the top of the head, and the number of big fish is more. The body color is gray-green on the back, gray-whi...

AI Technical Summary

Problems solved by technology

[0005] (1) The body color of the existing snakehead is single, and the color is black, which cannot meet the diverse market needs

[0006] (2) The existing snakehead population is relatively closed, blood relationship is unclear, and it is easy to cause inbreeding depression

[0007] (3) The offspring of the parents who have not been selected will easily lead to a series of problems such as less eggs, low fertilization rate, low hatching rate, high deformity rate, high mortality rate, and low feed coefficient.

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