Intramuscular fat(IMF) is a major meat-quality trait in pigs. The content of IMF is directly associated with the taste and flavor of pork. As a complex trait, there could be multiple genes affecting IMF content in por...Intramuscular fat(IMF) is a major meat-quality trait in pigs. The content of IMF is directly associated with the taste and flavor of pork. As a complex trait, there could be multiple genes affecting IMF content in pork. Genomewide association study is a powerful tool to detect genomic regions associated with phenotypic variations. The objectives of the present study were to identify or refine the positions of genomic regions affecting IMF, and to characterize candidate genes and pathways that may influence this trait. Of note, we identified a significant region in longissium dorsi muscle in a Duroc pig population for IMF content with Porcine SNP60 v2 Bead Chip. This region spans 1.24 Mb on chromosome 8 and had been identified as a quantitative trait locus for IMF in Pietrain, Large White, Landrace, and Leicoma pigs. In this region, eight SNPs were significantly associated with IMF content. Three genes proximal to these significant SNPs were considered candidate genes, including ZDHHC16, LOC102162218 and PCDH7. Our results confirm several previous findings and highlight several genes that may contribute to IMF variation in Duroc pigs.展开更多
To understand the fattening performance of Duroc x Landrace×Yorkshire and Duroc×Yorkshire x landrace, 48 individuals of two kinds of three-way crossbreeding lean type commercial pigs were selected to determi...To understand the fattening performance of Duroc x Landrace×Yorkshire and Duroc×Yorkshire x landrace, 48 individuals of two kinds of three-way crossbreeding lean type commercial pigs were selected to determine average daily feed intake, average daily gain and feed gain ratio. The backtat thickness and eye muscle area of pigs were measured at the end of trial. The results showed that Duroc × Landraee × Yorkshire and Dttroc × Yorkshire x Landrace had similar fattening performance, and could be applied under scientific management conditions. The study is of great significance for development of pig industry.展开更多
试验对 HMGA1基因的两个 SNPs 位点进行分析,研究了 HMGA1基因核苷酸多态性与生长、饲料利用性状的关联性。利用大白猪和民猪重测序结果比较发现了 HMGA1基因的两个 SNPs 位点（g.-543 T 〉 C 和g.1356 C〉T）,利用 Sequenom 质谱测序...试验对 HMGA1基因的两个 SNPs 位点进行分析,研究了 HMGA1基因核苷酸多态性与生长、饲料利用性状的关联性。利用大白猪和民猪重测序结果比较发现了 HMGA1基因的两个 SNPs 位点（g.-543 T 〉 C 和g.1356 C〉T）,利用 Sequenom 质谱测序平台对杜洛克猪 g.-543 T〉C 和 g.1356 C〉T 位点进行基因分型,并分析该位点多态性与生长、饲料利用性状的关联性。结果发现,杜洛克猪群体 g.-543 T〉C 位点,CT 与 CC 基因型相比,90日龄体重升高了2.15 kg （P 〈0.05）,30 kg 体重日龄降低了3.21 d （P 〈0.05）,断奶重升高,剩余采食量降低,100 kg 体重日龄减少,30-100 kg 平均日增重、40-90 kg 平均日采食量、40-90 kg 平均日增重均降低。杜洛克猪群体 g.1356 C〉T 位点,CC 与 TT 基因型相比,90日龄体重升高了0.37 kg （P 〈0.05）；平均日采食量降低0.13 kg/d （P 〈0.05）,100 kg 背膘厚降低0.43 mm （P 〈0.05）,剩余采食量降低了70.42 g （P 〈0.05）,30 kg 体重日龄降低了0.56 d （P 〈0.05）；40-90 kg 平均日采食量降低了0.17 kg （P 〈0.05）,断奶重升高,100 kg 体重日龄增大,30-100、40-90 kg 平均日增重均降低；CT 与 TT 基因型结果与上结果类似。结果初步表明 HMGA1基因两个 SNPs 位点的突变有利于杜洛克猪的生长、饲料利用效率的提高。展开更多
基金financial support from the National Natural Science Foundation of China (31601912)the Natural Science Foundation of Guangdong Province (2016A030310447)the Applied Science and Technology Research and Development of Special Funds of Guangdong Province (2015B020231010)
文摘Intramuscular fat(IMF) is a major meat-quality trait in pigs. The content of IMF is directly associated with the taste and flavor of pork. As a complex trait, there could be multiple genes affecting IMF content in pork. Genomewide association study is a powerful tool to detect genomic regions associated with phenotypic variations. The objectives of the present study were to identify or refine the positions of genomic regions affecting IMF, and to characterize candidate genes and pathways that may influence this trait. Of note, we identified a significant region in longissium dorsi muscle in a Duroc pig population for IMF content with Porcine SNP60 v2 Bead Chip. This region spans 1.24 Mb on chromosome 8 and had been identified as a quantitative trait locus for IMF in Pietrain, Large White, Landrace, and Leicoma pigs. In this region, eight SNPs were significantly associated with IMF content. Three genes proximal to these significant SNPs were considered candidate genes, including ZDHHC16, LOC102162218 and PCDH7. Our results confirm several previous findings and highlight several genes that may contribute to IMF variation in Duroc pigs.
文摘To understand the fattening performance of Duroc x Landrace×Yorkshire and Duroc×Yorkshire x landrace, 48 individuals of two kinds of three-way crossbreeding lean type commercial pigs were selected to determine average daily feed intake, average daily gain and feed gain ratio. The backtat thickness and eye muscle area of pigs were measured at the end of trial. The results showed that Duroc × Landraee × Yorkshire and Dttroc × Yorkshire x Landrace had similar fattening performance, and could be applied under scientific management conditions. The study is of great significance for development of pig industry.
文摘试验对 HMGA1基因的两个 SNPs 位点进行分析,研究了 HMGA1基因核苷酸多态性与生长、饲料利用性状的关联性。利用大白猪和民猪重测序结果比较发现了 HMGA1基因的两个 SNPs 位点（g.-543 T 〉 C 和g.1356 C〉T）,利用 Sequenom 质谱测序平台对杜洛克猪 g.-543 T〉C 和 g.1356 C〉T 位点进行基因分型,并分析该位点多态性与生长、饲料利用性状的关联性。结果发现,杜洛克猪群体 g.-543 T〉C 位点,CT 与 CC 基因型相比,90日龄体重升高了2.15 kg （P 〈0.05）,30 kg 体重日龄降低了3.21 d （P 〈0.05）,断奶重升高,剩余采食量降低,100 kg 体重日龄减少,30-100 kg 平均日增重、40-90 kg 平均日采食量、40-90 kg 平均日增重均降低。杜洛克猪群体 g.1356 C〉T 位点,CC 与 TT 基因型相比,90日龄体重升高了0.37 kg （P 〈0.05）；平均日采食量降低0.13 kg/d （P 〈0.05）,100 kg 背膘厚降低0.43 mm （P 〈0.05）,剩余采食量降低了70.42 g （P 〈0.05）,30 kg 体重日龄降低了0.56 d （P 〈0.05）；40-90 kg 平均日采食量降低了0.17 kg （P 〈0.05）,断奶重升高,100 kg 体重日龄增大,30-100、40-90 kg 平均日增重均降低；CT 与 TT 基因型结果与上结果类似。结果初步表明 HMGA1基因两个 SNPs 位点的突变有利于杜洛克猪的生长、饲料利用效率的提高。
