Association of the LPL gene polymorphisms with fatty acid composition in the longissimus dorsi muscle of Hu sheep

IF 1.6 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Yuanyuan Kong, Beixiang Jiang, Fadi Li, Xiangpeng Yue, Weiwei Fu
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Abstract

Lipoprotein lipase (LPL) is regarded as a candidate gene to regulate fatty acid (FA) composition. The study examined the mRNA expression levels of LPL in different tissues, and conducted a genetic association between the FA composition of the longissimus dorsi muscle of 1029 Hu sheep and the single nucleotide polymorphisms (SNPs) in the LPL gene, as well as the combined genotypes and haplotypes. The results showed that LPL had the highest expression levels in tail fat and subcutaneous fat. Eight SNPs were identified and successfully typed in the intronic region of the LPL gene. Correlation analysis showed that all eight SNPs were related to FA composition. Among them, the CC genotype of SNP1 (g.13879 T>C), the AA genotype of SNP2 (g.13971 A>G), and the TT genotype of SNP3 (g.13993 T>A) had the lowest levels of C8:0 and the highest levels of C18:3n3 content. The TT genotype of SNP6 (g.23413 T>C) and SNP7 (g.23469 T>C) and the AA genotype of SNP8 (g.23472 T>A) had the highest levels of C20:1 content. Linkage disequilibrium analysis showed that SNP1, SNP2, and SNP3 were located in block1, SNP4 (g.17118 A>G) and SNP5 (g.17188 A>G) were located in block2, and SNP6, SNP7, and SNP8 were located in block3. The C18:2n6c content of the TTAAAA combined genotypes in Block1 and the GGGG combined genotypes in Block2 was significantly higher than other combined genotypes. Haplotypes in both Block1 and Block2 significantly affected C18:0, C20:1, and C18:3n3. In conclusion, these genetic markers provide an important source of variation for the selection of FA composition of sheep muscle, which can accelerate the sheep breeding of high-quality meat with a balanced distribution of FA composition.

LPL基因多态性与胡羊背长肌脂肪酸组成的关系
脂蛋白脂肪酶(LPL)被认为是调控脂肪酸(FA)组成的候选基因。该研究检测了LPL在不同组织中的mRNA表达水平,并对1029只胡羊背长肌的脂肪酸组成与LPL基因中的单核苷酸多态性(SNPs)以及组合基因型和单倍型进行了遗传关联分析。结果表明,LPL在尾脂和皮下脂肪中的表达水平最高。在 LPL 基因的内含子区发现并成功分型了 8 个 SNPs。相关分析表明,这8个SNPs均与FA组成有关。其中,SNP1的CC基因型(g.13879 T>C)、SNP2的AA基因型(g.13971 A>G)和SNP3的TT基因型(g.13993 T>A)的C8:0含量最低,C18:3n3含量最高。SNP6(g.23413 T>C)和 SNP7(g.23469 T>C)的 TT 基因型以及 SNP8(g.23472 T>A)的 AA 基因型的 C20:1 含量最高。连锁不平衡分析表明,SNP1、SNP2 和 SNP3 位于 block1,SNP4(g.17118 A>G)和 SNP5(g.17188 A>G)位于 block2,SNP6、SNP7 和 SNP8 位于 block3。区块 1 中 TTAAAA 组合基因型和区块 2 中 GGGG 组合基因型的 C18:2n6c 含量明显高于其他组合基因型。Block1 和 Block2 中的单倍型对 C18:0、C20:1 和 C18:3n3 有明显影响。总之,这些遗传标记为绵羊肌肉 FA 成分的选择提供了重要的变异来源,可加速培育 FA 成分分布均衡的优质肉羊。
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来源期刊
Small Ruminant Research
Small Ruminant Research 农林科学-奶制品与动物科学
CiteScore
3.10
自引率
11.10%
发文量
210
审稿时长
12.5 weeks
期刊介绍: Small Ruminant Research publishes original, basic and applied research articles, technical notes, and review articles on research relating to goats, sheep, deer, the New World camelids llama, alpaca, vicuna and guanaco, and the Old World camels. Topics covered include nutrition, physiology, anatomy, genetics, microbiology, ethology, product technology, socio-economics, management, sustainability and environment, veterinary medicine and husbandry engineering.
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