College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China.
Laboratory of Animal Nutrition Physiology and Metabolism, The Chinese Academy of Sciences, The Institute of Subtropical Agriculture, Changsha 410128, China.
Genes (Basel). 2023 Jun 21;14(7):1308. doi: 10.3390/genes14071308.
Ningxiang pig is a breed renowned for its exceptional meat quality, but it possesses suboptimal carcass traits. To elucidate the genetic architecture of meat quality and carcass traits in Ningxiang pigs, we assessed heritability and executed a genome-wide association study (GWAS) concerning carcass length, backfat thickness, meat color parameters (L.LD, a.LD, b.LD), and pH at two postmortem intervals (45 min and 24 h) within a Ningxiang pig population. Heritability estimates ranged from moderate to high (0.300.80) for carcass traits and from low to high (0.110.48) for meat quality traits. We identified 21 significant SNPs, the majority of which were situated within previously documented QTL regions. Furthermore, the gene emerged as a pleiotropic gene that correlated with carcass length and backfat thickness. The , , and genes were associated with carcass length, while the gene was linked to backfat thickness. These genes hold the potential for use in selective breeding programs targeting carcass traits in Ningxiang pigs.
宁乡猪是一种以出色的肉质而闻名的品种，但它的胴体特征并不理想。为了阐明宁乡猪肉质和胴体特征的遗传结构，我们评估了遗传力，并针对胴体长、背膘厚、肉色参数（L.LD、a.LD、b.LD）和两个死后间隔（45 分钟和 24 小时）的 pH 值，在宁乡猪群体中进行了全基因组关联研究（GWAS）。胴体特征的遗传力估计值从中等到高（0.300.80），而肉质特征的遗传力估计值从低到高（0.110.48）。我们鉴定出 21 个显著的 SNP，其中大多数位于先前报道的 QTL 区域内。此外， 基因是一个与胴体长度和背膘厚相关的多效基因。 基因、 基因和 基因与胴体长度有关，而 基因与背膘厚有关。这些基因有可能用于宁乡猪胴体特征的选择性育种计划。
