Epistatic effect between ACACA and FABP2 gene on abdominal fat traits in broilers

作     者：Guo Hu 1, Shouzhi Wang 1, Jianwei Tian, Lili Chu, Hui Li College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China 

作者机构：College of Animal Science and Technology Northeast Agricultural University Harbin 150030 China 

出 版 物：《Journal of Genetics and Genomics》 (遗传学报（英文版）)

年 卷 期：2010年第37卷第8期

页      面：505-512页

核心收录：

学科分类：0710[理学-生物学] 071010[理学-生物化学与分子生物学] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National High-tech R&D Program (863 Program) (No. 2006AA10A120) the National Basic Research Program of China (973 Program) (No. 2006CB102105) the Earmarked Fund for Modern Agro-industry Technology Research system (No. nycytx-42) 

主　　题：chicken fatness epistasis ACACA FABP2 QTL 

摘      要：Epistasis is generally defined as the interaction between two or more genes or their mRNA or protein products to influence a single trait. Experimental evidence suggested that epistasis could be important in the determination of the genetic architecture of complex traits in domestic animals. Acetyl-coenzyme A carboxylase alpha （ACACA） and fatty acid binding protein 2 （FABP2） are both key factors of lipogenesis and transport. They may play a crucial role in the weight variability of abdominal adipose tissue in the growing chicken. In this study, the polymorphisms of c.2292G〉A in A CA CA and c.-561A〉C in FABP2 were detected among individuals from two broiler lines which were divergently selected for abdominal fat content. Epistasis between the two SNPs on abdominal fat weight （AFW） and ab- dominal fat percentage （AFP） was analyzed. The additive x additive epistatic components between these two SNPs were found significant or suggestively significant on both AFW and AFP in lean lines of the 9th and 10th generation; whereas, it was not significantly associated with either AFW or AFP in fat lines. At the same time, there were not any other significant epistatic components found in both generations or in both lines. Significant epistatic effects between these two SNPs found only in the lean lines could partly be due to the fact that the abdominal fat traits in these two experimental lines have been greatly modified by strong artificial selection. The results suggested that the epistasis mode may be different between the lean and fat chicken lines. Our results could be helpful in further understanding the genetic interaction between candidate genes contributing to phenotypic variation of abdominal fat content in broilers.