Genome selection method for laying number of white feather broilers
A technology for white-feathered broiler chickens and egg production, which is applied in the fields of genetic breeding and molecular biology, can solve the problems of time-consuming and resource-consuming, impractical poultry GS breeding practices, etc., to save costs, alleviate the dependence of provenance on foreign breeds, and improve progress slow effect
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Embodiment 2
[0125] Example 2 Effects of 5 SNP markers on egg production traits
[0126] The effects of five significant SNP loci on egg production traits are shown in Table 5.
[0127] Table 5 Effects of 5 significant SNPs on egg production traits (least square mean ± standard deviation)
[0128]
[0129] Note: Different shoulder letters indicate significant difference (P<0.05).
Embodiment 3
[0130] Example 3 Evaluation of the effect of genomic selection on egg production number of white-feathered broiler chickens by integrating significant SNP markers
[0131] 1. Use white-feathered broiler chickens to test the population, 2838, two generations. The phenotype records the number of individual eggs per day from 174 to 354 days. The total number of eggs laid at the age of 174-354 days for each individual was counted.
[0132] In this example, the target trait of genome selection is the number of eggs laid. A 55K SNP chip was used for genome-wide SNP typing and 5 most significant SNP typing, and a kinship matrix was constructed respectively. The two matrices were given different weights, and combined with the pedigree-based kinship matrix to form an H matrix. Then, the 5-fold cross-validation method was used to randomly divide the two generation groups, that is, 2838 chickens were randomly divided into 5 uniform groups, with 567 chickens in each group. Among the 5 ...
Embodiment 4
[0165] Embodiment 4 Utilizes the breeding method of the genomic selection of egg production number of white-feathered broiler chickens by integrating significant SNP markers
[0166] 1. Establishment of reference population, determination of phenotypic traits and genotype
[0167] Establish an independent reference group for each strain, and the source of the reference group is required to cover all existing families of the strain. When the reference flock is kept close to 52 weeks of age, a flock of 1000-1500 chickens is formed as the reference flock. The reference group has clear phenotype records (see Example 3 for methods), pedigree records, blood samples are collected, DNA is extracted, and sent to chicken genome-wide SNP chips for testing. Determine the genotypes of 30,000 to 50,000 SNP sites distributed evenly across the genome. For specific procedures, please refer to ZL201780023241.X (a chicken genome-wide SNP chip and its application). Determine the results of abo...
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