中国畜牧兽医 ›› 2023, Vol. 50 ›› Issue (12): 4973-4982.doi: 10.16431/j.cnki.1671-7236.2023.12.019

• 遗传繁育 • 上一篇    下一篇

沐川乌骨黑鸡LIPE基因第1外显子多态性及其与体重、肌内脂肪含量的关联分析

苟丹妮1, 王钢1, 沈雪梅1, 聂亮1, 惠文静1, 古丽帕日·艾克拜1,2, 杨雅玲1,2, 廖娟1, 喻世刚1   

  1. 1. 乐山师范学院, 川南地方品种鸡产业化四川省高等学校工程研究中心, 乐山 614000;
    2. 新疆农业大学动物科学学院, 乌鲁木齐 830052
  • 收稿日期:2023-06-22 出版日期:2023-12-05 发布日期:2023-11-28
  • 作者简介:苟丹妮,E-mail:1248723353@qq.com。

Polymorphism of LIPE Gene Exon 1 and Its Association with Body Weight and Intramuscular Fat Content in Muchuan Black-bone Chickens

GOU Danni1, WANG Gang1, SHEN Xuemei1, NIE Liang1, HUI Wenjing1, GULIPARI Aikebai1,2, YANG Yaling1,2, LIAO Juan1, YU Shigang1   

  1. 1. Engineering Research Center of Sichuan Province Higher School of Local Chicken Breeds Industrialization in Southern Sichuan, Leshan Normal University, Leshan 614000, China;
    2. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China
  • Received:2023-06-22 Online:2023-12-05 Published:2023-11-28
  • Contact: 四川省科技计划资助-重点研发项目(2022YFN0039);大学生创新创业训练计划项目(S202210649100、202110649014);乐山师范学院科技计划项目(DGZZ202002、22HX00051) E-mail:shigang_yu@163.com
  • Supported by:
    The project was supported by the National Key Research and Development Program of China (2019YFC1905301);National Natural Science Foundation of China (22078115,21776108,21690083,22008078).

摘要: 【目的】探究沐川乌骨黑鸡激素敏感脂酶(hormone-sensitive lipase,LIPE)基因第1外显子单核苷酸多态性(single nucleotide polymorphism,SNP)位点的遗传变异,并分析其与体重、肌内脂肪(intramuscular fat,IMF)含量的相关性。【方法】采集106只沐川乌骨黑鸡血液,利用PCR扩增和直接测序技术检测LIPE基因第1外显子SNP位点,采用SPSS 21.0软件分析LIPE基因第1外显子SNP位点多态性及其与沐川乌骨黑鸡体重、胸肌IMF含量的相关性;通过生物信息学在线工具分析LIPE基因第1外显子SNP位点对其编码氨基酸的影响;利用实时荧光定量PCR检测LIPE基因在沐川乌骨黑鸡不同组织和不同基因型个体胸肌中的相对表达量。【结果】沐川乌骨黑鸡LIPE基因第1外显子共检测到3个SNP位点,66 bp处SNP位点(SNP1:c.66 A>C)上发现AA、AC和CC 3种基因型;440 bp处SNP位点(SNP2:c.440 A>G)上发现AA和AG 2种基因型;462 bp处SNP位点(SNP3:c.462 G>A)上发现GG和GA 2种基因型。卡方适合性检验表明,沐川乌骨黑鸡LIPE基因第1外显子的SNP2、SNP3位点符号哈迪-温伯格平衡状态(P>0.05),SNP1位点偏离哈迪-温伯格平衡状态(P<0.05)。关联分析表明,SNP2位点的AG基因型个体胸肌IMF含量显著高于AA基因型(P<0.05),各位点不同基因型个体体重均无显著差异(P>0.05)。氨基酸序列比对分析显示,SNP2为非同义突变,其导致赖氨酸变为精氨酸。实时荧光定量PCR结果显示,LIPE基因在脂肪组织中表达量较高,SNP2位点AA基因型个体胸肌中LIPE基因mRNA表达水平极显著高于AG基因型(P<0.01)。【结论】沐川乌骨黑鸡LIPE基因第1外显子存在3个SNP位点,其中SNP2位点对沐川乌骨鸡IMF含量具有显著影响,该位点可作为沐川乌骨黑鸡IMF含量选育的候选分子遗传标记。

关键词: 沐川乌骨黑鸡; LIPE基因; 第1外显子; 肌内脂肪; 遗传变异

Abstract: 【Objective】 The aim of this study was to investigate the genetic variation of single nucleotide polymorphism (SNP) of hormone-sensitive lipase (LIPE) gene exon 1 in Muchuan Black-bone chickens,and analyzed the correlation with body weight and intramuscular fat (IMF) content.【Method】 The blood of 106 Muchuan Black-bone chickens was collected,and the SNP site of LIPE gene exon 1 was detected by PCR amplification and direct sequencing.SPSS 21.0 was used to analyze the SNP polymorphism of LIPE gene exon 1 and its correlation with body weight and IMF content of chest muscle in Muchuan Black-bone chickens.The effect of SNP of LIPE gene exon 1 on its amino acid was analyzed by bioinformatics online tool.Real-time quantitative PCR was used to detect the relative expression of LIPE gene in different tissues and chest muscles of different genotypes of Muchuan Black-bone chickens.【Result】 A total of 3 SNP sites were detected of LIPE gene exon 1 in Muchuan Black-bone chickens.Genotypes of AA,AC and CC were found in SNP1 (c.66 A>C).Genotypes of AA and AG were found in SNP2 (c.440 A>G).Genotypes of GG and GA were found in SNP3 (c.462 G>A).Chi-square fitness test showed that SNP2 and SNP3 of LIPE gene exon 1 in Muchuan Black-bone chickens were in Hardy-Weinberg equilibrium (P>0.05),and SNP1 deviated from Hardy-Weinberg equilibrium (P<0.05).Association analysis showed that the IMF content in chest muscle of AG genotype with SNP2 locus was significantly higher than that of AA genotype (P<0.05),and there was no significant difference in body weight among different genotypes with each locus (P>0.05).Amino acid sequence alignment analysis showed that SNP2 was a non-synonymous mutation,which caused lysine to become arginine.Real-time quantitative PCR results showed that the expression level of LIPE gene was higher in adipose tissue,and the mRNA expression level of LIPE gene in chest muscle of AA genotype with SNP2 locus was extremely significantly higher than that of AG genotype (P<0.01).【Conclusion】 There are three SNP of LIPE gene exon 1 in Muchuan Black-bone chickens,among which SNP2 locus has a significant effect on IMF content in Muchuan Black-bone chickens,and it could be used as a candidate molecular genetic marker for IMF content selection in Muchuan Black-bone chickens.

Key words: Muchuan Black-bone chickens; LIPE gene; exon 1; intramuscular fat; genetic variation

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