畜牧兽医学报 ›› 2021, Vol. 52 ›› Issue (11): 3294-3303.doi: 10.11843/j.issn.0366-6964.2021.011.030

• 研究简报 • 上一篇    下一篇

戴瑞奶绵羊产奶性状的全基因组关联分析

米布农1, 张立果2, 乌日汉1, 郭玉林1, 王春伟1, 徐全忠1, 冯爽1, 李光鹏1, 苏小虎1*, 张立1*   

  1. 1. 内蒙古大学生命科学学院 省部共建草原家畜生殖调控与繁育国家重点实验室, 呼和浩特 010020;
    2. 乌兰察布市农牧局 乌兰察布市家畜畜牧工作站, 乌兰察布 012000
  • 收稿日期:2021-03-29 出版日期:2021-11-23 发布日期:2021-11-24
  • 通讯作者: 张立,主要从事动物繁殖生物技术研究,E-mail:zhanglinmg@aliyun.com;苏小虎,主要从事动物繁育生物技术研究,E-mail:13947144670@139.com
  • 作者简介:米布农(1997-),女,山西忻州人,硕士生,主要从事动物繁育研究,E-mail:1026686170@qq.com
  • 基金资助:
    内蒙古自治区科技重大专项(30900-5173910);内蒙古大学省部共建草原家畜生殖调控与繁育国家重点实验室开放课题(SKY-IT-201811)

Genome-wide Association Study of Milk Production Traits in Dairy Meade Sheep

MI Bunong1, ZHANG Liguo2, BAI Urhan1, GUO Yulin1, WANG Chunwei1, XU Quanzhong1, FENG Shuang1, LI Guangpeng1, SU Xiaohu1*, ZHANG Li1*   

  1. 1. State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, College of Life Sciences, Inner Mongolia University, Hohhot 010020, China;
    2. Ulanqab Animal Husbandry Workstation, Ulanqab Agriculture and Animal Husbandry Bureau, Ulanqab 012000, China
  • Received:2021-03-29 Online:2021-11-23 Published:2021-11-24

摘要: 旨在通过对奶绵羊产奶性状的全基因组关联分析(GWAS),寻找和定位与奶绵羊产奶性状相关的遗传标记和功能基因。本研究以135只戴瑞奶绵羊为试验材料,基于全基因组重测序技术,通过SAMTOOLS进行单核苷酸多态性(SNP)检测,使用PLINK v1.90进行质控,利用GEMMA v 0.98.1的混合线性模型对质控结果进行奶绵羊产奶性状相关的全基因组关联分析。结果表明,有1个SNP与泌乳后90天日均产奶量在全基因组范围内显著相关,8个SNPs达到潜在显著关联,相关的候选基因包括TRNAQ-CUG-2、LOC114117240、ACADLMYL1、CHD6、SLCO3A1;有2个SNPs与150天日均产奶量达潜在显著关联,相关的候选基因包括PRMT6、RNF180;有2个SNPs与泌乳周期达潜在显著关联,相关的候选基因包括PRMT6、TRNAW-CCA-68、TRNAS-GGA-61。进一步基因功能分析推测,ACADLSLCO3A1可能是影响奶绵羊产奶性状的候选基因。本研究为奶绵羊产奶性状的分子机制解析提供了一定的基础,为我国奶绵羊新品种培育提供了一定的理论参考。

关键词: 全基因组关联分析, 戴瑞奶绵羊, 产奶性状, 重测序, 候选基因

Abstract: The study aimed to identify and map the genetic markers and functional genes which associated with milk production traits through genome-wide association analysis (GWAS) of milk production traits in Dairy Meade(DM) sheep. In this study, 135 DM sheep were collected and the whole genome resequencing technology was used. The single nucleotide polymorphisms (SNPs) were identified through SAMTOOLS software. The quality control (QC) was performed by Plink v1.90 software. The genome-wide association analysis of milk production traits in DM sheep was performed based on the QC results using the mixed linear model of GEMMA v 0.98.1. The results showed that there was one SNP which was significantly correlated and 8 SNPs were potentially significantly correlated with D90 average daily milk yield trait at genome-wide; The associated candidate genes included TRNAQ-CUG-2, LOC114117240, ACADL, MYL1, CHD6 and SLCO3A1. There were 2 SNPs which were potentially significantly correlated with D150 average daily milk yield trait; The associated candidate genes included PRMT6 and RNF180. There were 2 SNPs which were potentially significantly correlated with lactation period trait; The associated candidate genes included PRMT6, TRNAW-CCA-68 and TRNAS-GGA-61. Further gene functional analysis suggested that ACADL and SLCO3A1 were likely candidate genes which affect milk production traits of DM sheep. This study provides a certain basis for the exploration of milk production traits molecular mechanism in dairy sheep. The result could provide a certain theoretical reference for new dairy sheep breeding in China.

Key words: genome-wide association analysis, Dairy Meade(DM) sheep, milk production traits, resequencing, candidate gene

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