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Genome-Wide Association Studies for Flesh Color and Intramuscular Fat in (Duroc x Landrace x Large White) Crossbred Commercial Pigs

文献类型： 外文期刊

作者： Li, Hao 1 ; Xu, Cineng 1 ; Meng, Fanming 3 ; Yao, Zekai 1 ; Fan, Zhenfei 1 ; Yang, Yingshan 1 ; Meng, Xianglun 1 ; Zhan, Yuexin 1 ; Sun, Ying 1 ; Ma, Fucai 1 ; Yang, Jifei 1 ; Yang, Ming 4 ; Yang, Jie 1 ; Wu, Zhenfang 1 ; Cai, Gengyuan 1 ; Zheng, Enqin 1 ;

作者机构： 1.South China Agr Univ, Coll Anim Sci, Guangzhou 510642, Peoples R China

2.South China Agr Univ, Natl Engn Res Ctr Breeding Swine Ind, Guangzhou 510642, 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

4.Zhongkai Univ Agr & Engn, Coll Anim Sci & Technol, Guangzhou 510225, Peoples R China

5.South China Agr Univ, Guangdong Prov Key Lab Agroanim Genom & Mol Breedi, Guangzhou 510642, Peoples R China

6.Guangdong Lab Lingnan Modern Agr, Yunfu Subctr, Yunfu 527400, Peoples R China

关键词： meat quality; genome-wide association studies (GWAS); intramuscular fat; flesh color; pig; single nucleotide polymorphism (SNP)

期刊名称：GENES （ 影响因子：4.141； 五年影响因子：4.474 ）

ISSN：

年卷期： 2022 年 13 卷 11 期

页码：

收录情况： SCI

摘要： The intuitive impression of pork is extremely important in terms of whether consumers are enthusiastic about purchasing it. Flesh color and intramuscular fat (IMF) are indispensable indicators in meat quality assessment. In this study, we determined the flesh color and intramuscular fat at 45 min and 12 h after slaughter (45 mFC, 45 mIMF, 12 hFC, and 12 hIMF) of 1518 commercial Duroc x Landrace x Large White (DLY) pigs. We performed a single nucleotide polymorphism (SNP) genome-wide association study (GWAS) analysis with 28,066 SNPs. This experiment found that the correlation between 45 mFC and 12 hFC was 0.343. The correlation between 45 mIMF and 12 hIMF was 0.238. The heritability of the traits 45 mFC, 12 hFC, 45 mIMF, and 12 hIMF was 0.112, 0.217, 0.139, and 0.178, respectively, and we identified seven SNPs for flesh color and three SNPs for IMF. Finally, several candidate genes regulating these four traits were identified. Three candidate genes related to flesh color were provided: SNCAIP and PRR16 on SSC2, ST3GAL4 on SSC5, and GALR1 on SSC1. A total of three candidate genes related to intramuscular fat were found, including ABLIM3 on SSC2, DPH5 on SSC4, and DOCK10 on SSC15. Furthermore, GO and KEGG analysis revealed that these genes are involved in the regulation of apoptosis and are implicated in functions such as pigmentation and skeletal muscle metabolism. This study applied GWAS to analyze the scoring results of flesh color and IMF in different time periods, and it further revealed the genetic structure of flesh color and IMF traits, which may provide important genetic loci for the subsequent improvement of pig meat quality traits.

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