文献类型： 外文期刊
作者： Chen, Anqi 1 ; Zhao, Xiaoyu 3 ; Wen, Junhui 6 ; Zhao, Xiurong 1 ; Wang, Gang 1 ; Zhang, Xinye 1 ; Ren, Xufang 1 ; Zhang, Yalan 1 ; Cheng, Xue 1 ; Yu, Xiaofan 1 ; Mei, Xiaohan 1 ; Wang, Huie 1 ; Guo, Menghan 1 ; Jiang, Xiaoyu 1 ; Wei, Guozhen 6 ; Wang, Xue 5 ; Jiang, Runshen 2 ; Guo, Xing 2 ; Ning, Zhonghua 1 ; Qu, Lujiang 1 ;
作者机构： 1.China Agr Univ, Coll Anim Sci & Technol, Natl Engn Lab Anim Breeding, Beijing 100193, Peoples R China
2.Tarim Univ, Key Lab Protect & Utilizat Biol Resources Tarim Ba, Xinjiang Prod & Construct Corps, Alar 843300, Peoples R China
3.Anhui Agr Univ, Coll Anim Sci & Technol, Hefei 230036, Anhui, Peoples R China
4.Xingrui Agr Stock Breeding, Baoding 072550, Baoding Hebei P, Peoples R China
5.VVBK Anim Med Diagnost Technol Beijing Co Ltd, Beijing, Peoples R China
6.Qingliu Anim Husb Vet & Aquat Prod Ctr, Sanming, Peoples R China
7.Beijing Acad Agr & Forestry Sci, Inst Anim Husb & Vet Med, Beijing 100097, Peoples R China
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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