Genetic parameter estimation and molecular foundation of chicken egg-laying trait

文献类型： 外文期刊

第一作者： Chen, Anqi

作者： Chen, Anqi;Zhao, Xiurong;Wang, Gang;Zhang, Xinye;Ren, Xufang;Zhang, Yalan;Cheng, Xue;Yu, Xiaofan;Mei, Xiaohan;Guo, Menghan;Jiang, Xiaoyu;Ning, Zhonghua;Qu, Lujiang;Jiang, Runshen;Guo, Xing;Qu, Lujiang;Zhao, Xiaoyu;Zhao, Xiaoyu;Wang, Xue;Wen, Junhui;Wei, Guozhen;Wen, Junhui

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关键词： chicken; AFE; heritability; genome-wide association study

期刊名称：POULTRY SCIENCE （ 影响因子：3.8； 五年影响因子：4.1 ）

ISSN： 0032-5791

年卷期： 2024 年 103 卷 6 期

页码：

收录情况： SCI

摘要： The age of first egg (AFE) in chicken can affect early and even life-time egg production performance to some extent, and therefore is an important economic trait that affects production efficiency. To better understand the genetic patterns of AFE and other production traits including body weight at first egg (BWA), first egg weight (FEW), and total egg number from AFE to 58 wk of age (total -EN), we recorded the production performance of 2 widely used layer breeds, white leghorn (WL) and Rhode Island Red (RIR) and estimated genetic parameters based on pedigree and production data. The results showed that the heritability of AFE in both breeds ranged from 0.4 to 0.6, and AFE showed strong positive genetic and phenotypic correlations to BWA as well as FEW, while showing strong negative genetic and phenotypic correlations with total -EN. Furtherly, by genomewide association analysis study (GWAS), we identified 12 and 26 significant SNPs to be related to AFE in the 2layer breeds, respectively. A total of 18 genes were identified that could affect AFE based on the significant SNP annotations obtained, but there were no gene overlapped in the 2 breeds indicating the genetic foundation of AFE could differ from breed to breed. Our results provided a deeper understanding of genetic patterns and molecular basement of AFE in different breeds and could help in the selection of egg production traits.

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