Breeding method of high-yield new-breed of silver-feather chickens laying green-shell eggs

Abstract

The invention relates to a breeding method of high-yield new-breed of silver-feather chickens laying green-shell eggs. The method includes the following steps that firstly, a hen laying eggs with green shells and a parent-generation female parent cock of a chicken, hatched in an automatic sexing mode, having gold and silver feathers and laying high-yield eggs with red shells are selected from local chicken breeds and are subjected to hybridization to obtain F1 generations; secondly, the F1 generations are subjected to crossing, purely-white-feather cocks and purely-white-feather hens laying eggs with green shells are selected from F2 generations, and self-breeding and breed enlarging are carried out; thirdly, test mating and identification are carried out on hens having purely-white feathers and laying eggs with green shells and cocks with purely-white feathers in later self-breeding generations by a cock having yellow-red feathers and laying eggs with brown shells and a hen having yellow-red feathers and laying eggs with brown shells respectively, individuals of which cock and hen green shell and silver feature genes are homozygotes are selected out, and self-breeding and breed enlarging are carried out; fourthly, the third step is repeated until stable inheritance of sliver feather and green shell characters is achieved; fifthly, the fourth step is repeated until a high-yield new breed of chickens having silver feathers and laying eggs with green shells is obtained. By means of the method, the egg yield can be substantially increased, two-way crossing can be carried out between the high-yield new breed as a female parent and other breeds, and the automatic sexing rate, green shell rate and the like of later generations can reach 100%.

Description

technical field [0001] The invention belongs to the technical field of poultry breeding, and in particular relates to a method for cultivating a new high-yielding strain of silver-colored and green-shell laying hens. Background technique [0002] Many local chicken breeds in my country have individuals that produce green-shell eggs, such as Jiuyuan black chicken, Dongxiang green-shell layer, Macheng green-shell layer, Lushi chicken, etc. These chicken breeds are both egg and meat, and the number of eggs is low. [0003] At present, the sex-linked genes that can be used for self-sexing of newborn chicks mainly include fast and slow feather genes, horizontal spot genes, and gold and silver genes. Most of the local chicken breeds that have not been systematically selected in my country have the slow feather gene, and a few have the horizontal spot gene. It may be because chickens with the silver feather gene have white feathers and are not popular with consumers, so it is dif...

AI Technical Summary

Problems solved by technology

It may be because chickens with the silver feather gene have white feathers and are not popular with consumers, so it is difficult to see the silver feather gene in local chicken breeds