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Food intake-related genes in chicken determined through combinatorial genome-wide association study and transcriptome analysis

文献类型: 外文期刊

作者: Cao, Xuemin 1 ; Wang, Yuzhe 1 ; Shu, Dingming 3 ; Qu, Hao 3 ; Luo, Chenglong 3 ; Hu, Xiaoxiang 1 ;

作者机构: 1.China Agr Univ, Coll Biol Sci, State Key Lab Agrobiotechnol, Beijing 100193, Peoples R China

2.China Agr Univ, Coll Anim Sci & Technol, Beijing 100193, Peoples R China

3.Guangdong Acad Agr Sci, Inst Anim Sci, State Key Lab Livestock & Poultry Breeding, Guangdong Key Lab Anim Breeding & Nutr, Guangzhou 510640, Peoples R China

关键词: genome-wide association study; growth; RNA-seq

期刊名称:ANIMAL GENETICS ( 影响因子:3.169; 五年影响因子:3.058 )

ISSN: 0268-9146

年卷期: 2020 年 51 卷 5 期

页码:

收录情况: SCI

摘要: The chicken gizzard is the primary digestive and absorptive organ regulating food intake and metabolism. Body weight is a typical complex trait regulated by an interactive polygene network which is under the control of an interacting network of polygenes. To simplify these genotype-phenotype associations, the gizzard is a suitable target organ to preliminarily explore the mechanism underlying the regulation of chicken growth through controlled food intake. This study aimed to identify key food intake-related genes through combinatorial GWAS and transcriptome analysis. We performed GWAS of body weight in an F(2)intercrossed population and transcriptional profiling analysis of gizzards from chickens with different body weight. We identified a major 10 Mb quantitative trait locus (QTL) on chromosome 1 and numerous minor QTL distributed among 24 chromosomes. Combining data regarding QTL and gizzard gene expression, two hub genes,MLNRandHTR2A, and a list of core genes with small effect were found to be associated with food intake. Furthermore, the neuroactive ligand-receptor interaction pathway was found to play a key role in regulating the appetite of chickens. The present results show the major-minor gene interactions in metabolic pathways and provide insights into the genetic architecture and gene regulation during food intake in chickens.

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