河南农业科学 ›› 2023, Vol. 52 ›› Issue (5): 150-155.DOI: 10.15933/j.cnki.1004-3268.2023.05.017

• 畜牧·兽医 • 上一篇    下一篇

不同品种猪PVALB基因多态性及其在肌肉组织的表达差异分析

韩雨晴1,2,薄素雪1,2,严飞飞1,2,段梦琪1,2,强巴央宗1,2,商鹏1,2   

  1. (1.西藏农牧学院动物科学学院,西藏 林芝 860000;2.西藏特色农牧资源研发省部共建协同创新中心,西藏 林芝 860000)
  • 出版日期:2023-05-15 发布日期:2023-06-09
  • 通讯作者: 商鹏(1984-),男,江苏常州人,副教授,博士,主要从事高原动物遗传资源保护与功能基因组研究工作。E-mail:nemoshpmh@126.com
  • 作者简介:韩雨晴(1999-),女,山东淄博人,在读硕士研究生,研究方向:高原动物遗传育种与保护。E-mail:hyq079778@163.com
  • 基金资助:
    林芝市巴宜区重点研发计划项目(2021-GX-SY-01);西藏自治区重大科技专项(XZ202101ZD0005N);中国农业大学基本科研业务费专项(2022TC125)

Analysis of Porcine PVALB Gene Polymorphism and Differential Expression in Muscle Tissues of Different Pig Breeds

HAN Yuqing1,2,BO Suxue1,2,YAN Feifei1,2,DUAN Mengqi1,2,CHAMBA Yangzom1,2,SHANG Peng1,2   

  1. (1.Animal Science College,Tibet Agriculture & Animal Husbandry University,Linzhi 860000,China;2.The Provincial and Ministerial Co‐founded Collaborative Innovation Center for R & D in Tibet Characteristic Agricultural and Animal Husbandry Resources,Linzhi 860000,China)
  • Published:2023-05-15 Online:2023-06-09

摘要: 为探究小白蛋白(PVALB)基因在藏猪和大约克猪上的单核苷酸多态性(SNP)位点及在不同品种猪腿肌、背最长肌中的表达规律,以30、90、180日龄的藏猪和大约克猪作为试验对象,对藏猪和大约克猪PVALB基因起始密码子上游2 000 bp区域DNA序列进行SNP筛选与基因分型,利用实时荧光定量PCR技术检测PVALB 基因在腿肌和背最长肌中的差异表达情况。结果显示,PVALB基因起始密码子上游2 000 bp区域存在2 个SNP位点G1659C和C1269T,且均符合哈迪-温伯格定律(P>0.05);预测转录因子结果显示,G1659C和C1269T突变位点导致NRF2、NCOR1转录因子结合位点消失,新增与肌肉生长和细胞分化有关的NR1D1和OTX2转录因子结合位点;PVALB 基因在藏猪及大约克猪腿肌和背最长肌中mRNA相对表达量趋势基本一致,在30 日龄和90日龄,大约克猪背最长肌PVALB基因表达量极显著高于藏猪(P<0.01),在180 日龄时显著高于藏猪(P<0.05)。综上,PVALB基因表达可能与肌肉的生长发育呈正相关,同时PVALB 基因可作为骨骼肌早期发育和肉质性状研究新的候选基因。

关键词: PVALB基因, 藏猪, 大约克猪, 多态性, 肌肉生长, 转录因子

Abstract: To investigate the single nucleotide polymorphism(SNP)loci of the small albumin(PVALB)gene in Tibetan and York pigs and the expression pattern in the leg and longest dorsal muscles of different pig breeds,Tibetan and York pigs at 30,90 and 180 days of age were used as test subjects,SNP screening and genotyping of DNA sequences in the 2 000 bp region upstream of the start codon of PVALB gene in Tibetan and Yorke pigs were performed. Detection of PVALB gene differential expression in the leg and longest dorsal muscles was carried out by using real‐time fluorescent quantitative PCR.The results showed that two SNP sites,G1659C and C1269T,were identified by polymorphism detection in the 2 000 bp region upstream of the PVALB gene start codon,and both conformed to the Hardy‐Weinberg law(P>0.05).The results of the predicted transcription factors showed that G1659C and C1269T mutant sites led to the disappearance of NRF2 and NCOR1 transcription factors and the addition of NR1D1 and OTX2 transcription factors related to muscle growth and cell differentiation.The relative mRNA expression trends of PVALB gene in the leg and longest dorsal muscles of Tibetan and Yorke pigs were basically the same,at 30 and 90 days of age,PVALB gene expression in the longest dorsal muscle of York pigs was highly significantly higher than that of Tibetan pigs(P<0.01),significantly higher than Tibetan pigs at 180 days of age(P<0.05).In conclusion,PVALB gene expression may be positively correlated with muscle growth and development,and PVALB gene may be a new candidate gene for early skeletal muscle development and meat quality trait studies.

Key words: PVALB gene, Tibetan pig, York pig, Polymorphism, Muscle growth, Transcription factor

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