Genome-wide association analysis of egg production performance in chickens across the whole laying period.

ABSTRACT:

Background

Egg production is the most economically-important trait in layers as it directly influences benefits of the poultry industry. To better understand the genetic architecture of egg production, we measured traits including age at first egg (AFE), weekly egg number (EN) from onset of laying eggs to 80 weeks which was divided into five stage (EN1: from onset of laying eggs to 23 weeks, EN2: from 23 to 37 weeks, EN3: from 37 to 50 weeks, EN4: from 50 to 61 weeks, EN5: from 61 to 80 weeks) based on egg production curve and total egg number across the whole laying period (Total-EN). Then we performed genome-wide association studies (GWAS) in 1078 Rhode Island Red hens using a linear mixed model.

Results

Estimates of pedigree and SNP-based genetic parameter showed that AFE

SUBMITTER: Liu Z 

PROVIDER: S-EPMC6693279 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature