Method for breeding novel strain of anurous laying hens

Abstract

The invention relates to a method for breeding a novel strain of anurous laying hens. The method includes steps of (1), selecting mutant anurous cocks and hens from indigenous chicken or laying hen resources and enabling the cocks and hens to perform self-reproduction to expand propagation; (2), selecting anurous cocks and hens from descendents of the expanded propagation, introducing blood relationship of high-yield laying hens into the anurous cocks and hens, selecting anurous cocks and hens in hybrid descendents, enabling the anurous cocks and hens to perform cross-breeding, and selectively reserving anurous cocks and hens in cross-bred descendents; (3), performing test-cross on the reserved anurous cocks and hens, evaluating the anurous cocks and hens and screening individual cocks and hens which are anurous genetic homozygous and enabling the individual cocks and hens to perform self-reproduction to expand propagation; (4), selecting the anurous genetic homozygous cocks and hens and improving the bodily form and appearance uniformity and the laying performance of the anurous genetic homozygous cocks and hens; (5), repeating executing the steps (3) and (4) until the novel strain of laying hens with the anurous character capable of being stably inherited. Appearance features of the anurous cocks and hens in cross-bred descendents meet requirements of breeding objectives. The method has the advantages that the bred novel strain of anurous laying hens is fast in growing speed and high in dressing percentage and egg numbers, and requirements of modern laying hen and broiler production can be met.

Description

technical field [0001] The invention belongs to the technical field of poultry breeding, and in particular relates to a method for cultivating new strains of tailless laying hens. Background technique [0002] The so-called tailless chicken refers to a chicken that lacks tail vertebrae, tail brown bones, or both. Therefore, tailless chickens have no tail feathers, sickle feathers, and tail fat glands. Tailless chickens can be observed in many chicken flocks. Among the many local chicken breeds in our country, the tailless chicken is the tailless chicken. However, the chicken has low egg production and slow growth rate, which is not suitable for the production needs of modern egg broilers; and no commercial tailless chicken strain has been cultivated at home and abroad. The tailless trait is an autosomal single-gene dominant genetic trait. Due to the lack of tail bones, the tailless chicken has a high meat yield, but the tailless gene has an additive effect on the fertilizat...

AI Technical Summary

Problems solved by technology

However, the chicken has low egg production and slow growth rate, which is not suitable for the production needs of modern egg broilers; and no commercial tailless chicken strain has been cultivated at home and abroad.