Method for breeding recessive white-feather short-foot green-shell high-yield laying hens
A technology of recessive white feathers and breeding methods, applied in the field of breeding, can solve the problems of mixed feather color and difficult to purify, difficult to purify feather color, affecting the sales of eliminated hens, etc., to reduce workload, improve efficiency, and achieve high egg production. Effect
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Embodiment 1
[0025] The green-shell gene of the green-shell layer is introduced into the recessive white-feathered bantam population, and the recessive white-feathered bantam roosters and hens carrying the homozygous green-shell gene are obtained through hybridization and test crossing. The specific steps are as follows:
[0026] (1) Green-shell gene introduction: Use green-shell egg males and hens (homozygous colored feathers, normal body shape, carrying homozygous green-shell genes) to carry out with recessive white-feathered bantam males and hens (powder-shell eggs) respectively. For reciprocal crossing, 1,580 bantam hens (heterozygous colored feathers, laying green eggs) were selected from the orthogonal combination, and 124 roosters (heterozygous colored feathers, heterozygous normal body shape) were selected from the reciprocal and reciprocal combination. Next breeding use.
[0027] (2) Intercrossing of the F1 generation: the roosters and bantam hens selected from the F1 generation w...
Embodiment 2
[0031] The cock and hen that carry the homozygous green-shell gene obtained in Example 1 are used to set up a family line, and through family selection and individual selection, breeding and expansion are carried out, and recessive white feather bantam green-shell high-yielding laying hens are cultivated.
[0032] In the F2 generation, recessive white-feathered bantam males and hens carrying homozygous green-shell genes were selected to construct multiple families, and breeding eggs were produced by mating within each family;
[0033] Determine the fertilization rate of each family and the eggs of each hen, eliminate 5% of the families with the lowest fertilization rate, and eliminate the 5% hens with the lowest fertilization rate in other families;
[0034] At the age of 6 weeks, 20% of the individuals will be eliminated according to their appearance and weight;
[0035] At the age of 18-20 weeks, chicken pullorum and chicken leukemia are tested, and positive chickens are eli...
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