Seed production method of non-short high-yield small-egg layer synthetic line

Abstract

The invention relates to a seed production method of a non-short high-yield small-egg layer synthetic line. The seed production method includes following steps: S1, forming an underlying group, and producing a pure-line chicken group: taking egg weight as a main option character for screening, and screening a rooster and a hen from existing high-yield layer lines to form a family for expanding propagation to obtain the pure-line chicken group; S2, performing closed flock continuous progeny breeding on the obtained pure-line chicken group, and obtaining a high-yield small-egg specialized line through breeding of four generations in a row; S3, taking the high-yield small-egg specialized line as a male parent and other layer lines of about 60g in average egg weight in the whole process of egglaying as a female parent, and matching to obtain a goods-generation layer new synthetic line, namely the non-short high-yield small-egg layer synthetic line. Goods-generation chickens have the advantages of small egg weight, high egg yield and moderate body weight, comprehensive benefit of layers is increased, domestic high-yield layer variety type is enriched, and brand layer development needscan be met.

Description

technical field [0001] The invention relates to the technical field of breeding of new breeds of laying hens, in particular to a seed production method of a matching line of non-dwarf small laying hens with high yield. Background technique [0002] As a cheap and high-quality protein source, eggs have become an important part of the diet of urban and rural residents in my country. With the increase of residents' disposable income, the consumption structure is constantly upgrading, and the proportion of high-end consumer groups is increasing. The demand for purchasing packaged and branded eggs is on the rise, and the branding of eggs has entered a stage of rapid development. Market research shows that the average egg weight of brand eggs is about 55g. [0003] In current commercial laying hen breeding, high-yield laying hens are mating lines formed by crossing different high-product lines. The existing high-product lines are generally derived from standard breeds such as Lu...

AI Technical Summary

Problems solved by technology

The existing high-product lines are generally derived from standard breeds such as Luodaohong, Luodaobai and Bailaihang. The average egg weight in the whole laying process is above 60g. , cannot meet the market demand for branded eggs

Introducing the recessive sex-linked dwarf gene (dw) in the breeding process of the mating line can meet the egg weight requirement, but the number of laying hens bred in this way is generally less than 310 per day at the age of 72 weeks, and the laying performance needs to be further improved At the same time, the weight of adult chickens is below 1800g, which will affect the sales and price of culled chickens

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