数字农科院2.0

Large-scale genomic and transcriptomic analyses elucidate the genetic basis of high meat yield in chickens

文献类型： 外文期刊

作者： Tan, Xiaodong;Liu, Ranran;Zhao, Di;He, Zhengxiao;Li, Wei;Zheng, Maiqing;Li, Qinghe;Wang, Qiao;Liu, Dawei;Feng, Furong;Zhu, Dan;Zhao, Guiping;Wen, Jie

作者机构：

关键词： Broiler chicken;Meat yield;Domestication;GWAS;Transcriptomic;SOX6

期刊名称： JOURNAL OF ADVANCED RESEARCH

ISSN： 2090-1232

年卷期： 2024 年 55 卷

页码：

收录情况： SCIE（2024版）

摘要： Introduction: Investigating the genetic markers and genomic signatures related to chicken meat production by combing multi-omics methods could provide new insights into modern chicken breeding technology systems. Object: Chicken is one of the most efficient and environmentally friendly livestock, especially the fast-growing white-feathered chicken (broiler), which is well known for high meat yield, but the underlying genetic basis is poorly understood. Method: We generated whole-genome resequencing of three purebred broilers (n = 748) and six local breeds/lines (n = 114), and sequencing data of twelve chicken breeds (n = 199) were obtained from the NCBI database. Additionally, transcriptome sequencing of six tissues from two chicken breeds (n = 129) at two developmental stages was performed. A genome-wide association study combined with cis-eQTL mapping and the Mendelian randomization was applied. Result: We identified > 17 million high-quality SNPs, of which 21.74% were newly identified, based on 21 chicken breeds/lines. A total of 163 protein-coding genes underwent positive selection in purebred broilers, and 83 genes were differentially expressed between purebred broilers and local chickens. Notably, muscle development was proven to be the major difference between purebred broilers and local chickens, or ancestors, based on genomic and transcriptomic evidence from multiple tissues and stages. The MYH1 gene family showed the top selection signatures and muscle-specific expression in purebred broilers. Furthermore, we found that the causal gene SOX6 influenced breast muscle yield and also related to myopathy occurrences. A refined haplotype was provided, which had a significant effect on SOX6 expression and phenotypic changes. Conclusion: Our study provides a comprehensive atlas comprising the typical genomic variants and transcriptional characteristics for muscle development and suggests a new regulatory target (SOX6-MYH1s axis) for breast muscle yield and myopathy, which could aid in the development of genome-scale selective breeding aimed at high meat yield in broiler chickens. (c) 2023 The Authors. Published by Elsevier B.V. on behalf of Cairo University.

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