畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (4): 1744-1754.doi: 10.11843/j.issn.0366-6964.2025.04.023

• 遗传育种 • 上一篇    下一篇

德州驴体尺性状的全基因组关联分析

李聪1(), 苏江天1, 李一丹1, 王朝飞1, 于杰2, 雷初朝1, 党瑞华1,*()   

  1. 1. 西北农林科技大学动物科技学院, 杨凌 712100
    2. 国家胶类中药工程技术研究中心东阿阿胶股份有限公司, 聊城 252201
  • 收稿日期:2024-10-08 出版日期:2025-04-23 发布日期:2025-04-28
  • 通讯作者: 党瑞华 E-mail:lc863749946@163.com;dangruihua@nwsuaf.edu.cn
  • 作者简介:李聪(1996-), 女, 河南鹤壁人, 博士, 主要从事动物遗传资源与育种研究, E-mail: lc863749946@163.com
  • 基金资助:
    第三次全国畜禽遗传资源普查项目(K4050422227);陕西省秦创原科学家+工程师项目(2022KXJ-112);中央引导地方项目(K3030922098)

Genome-wide Association Study of Body Traits in Dezhou Donkey

LI Cong1(), SU Jiangtian1, LI Yidan1, WANG Zhaofei1, YU Jie2, LEI Chuzhao1, DANG Ruihua1,*()   

  1. 1. College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
    2. National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Dong'e E'jiao Co., Ltd., Liaocheng 252201, China
  • Received:2024-10-08 Online:2025-04-23 Published:2025-04-28
  • Contact: DANG Ruihua E-mail:lc863749946@163.com;dangruihua@nwsuaf.edu.cn

摘要:

旨在探究德州驴体尺性状的遗传基础,本研究采集2~3周岁的健康德州驴母驴血液作为试验材料,共139头。测定试验群体的体尺性状,并进行描述性统计分析。利用“家驴一号”40K液相芯片对全部个体进行基因分型。使用混合线性模型对11个体尺性状进行全基因组关联分析(genome-wide association study, GWAS),并对候选基因进行功能注释和通路富集分析。结合精细映射和连锁不平衡分析,识别体尺性状的潜在因果SNPs位点。通过GWAS鉴定到3个全基因组显著和20个潜在显著的SNPs位点以及41个候选基因与体尺性状显著关联。GO和KEGG富集分析结果表明,候选基因显著富集在与成骨分化、骨骼肌发育和脂质代谢相关的生物学过程。综合精细映射和连锁不平衡分析,在16号染色体候选区域内检测到4个显著SNPs位点存在强连锁不平衡。本研究结果为德州驴体尺性状遗传机制的解析奠定了基础,为分子标记辅助选择在驴育种工作中的应用提供了参考依据。

关键词: 德州驴, 体尺性状, 全基因组关联分析, 精细映射

Abstract:

To investigate the genetic basis of the body traits in Dezhou donkeys, this study collected blood samples from 139 healthy female Dezhou donkeys aged 2-3 years old as experimental materials. Body traits of the experimental population were measured, and descriptive statistical analyses were conducted. All individuals were genotyped using the 'Molbreeding Donkey No. 1' 40K liquid chip. The mixed linear model was used to perform a genome-wide association study (GWAS) on 11 body traits, and functional annotation and pathway enrichment analysis was performed on candidate genes. The fine mapping and linkage disequilibrium analyses was combined to detect the potential causal SNP loci associated with body traits. The GWAS results revealed 3 SNPs at the genome-wide significance level, 20 SNPs at the genome-wide suggestive level, and 41 candidate genes were identified as significantly associated with body traits. The GO and KEGG enrichment analysis indicated that candidate genes were significantly enriched in biological processes related to osteogenic differentiation, skeletal muscle development and lipid metabolism. Fine mapping and linkage disequilibrium analysis detected 4 significant SNPs with strong linkage disequilibrium within the candidate region on chromosome 16. The results of this study lay the foundation for the analysis of the genetic mechanism of body traits in Dezhou donkeys, and provide a reference for the application of molecular marker-assisted selection in donkey breeding.

Key words: Dezhou donkey, body traits, genome-wide association study, fine mapping

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