畜牧兽医学报 ›› 2023, Vol. 54 ›› Issue (3): 1026-1033.doi: 10.11843/j.issn.0366-6964.2023.03.016

• 遗传育种 • 上一篇    下一篇

柴达木牛和蒙古牛Y染色体基因组遗传多样性与父系起源研究

马志杰1, 王世康2, 张卫忠3, 郭卫兴1, 赵海明4, 雷初朝2*   

  1. 1. 青海大学畜牧兽医科学院, 农业农村部青藏高原畜禽遗传育种重点实验室, 青海省高原家畜遗传资源保护与创新利用重点实验室, 西宁 810016;
    2. 西北农林科技大学动物科技学院, 杨凌 712100;
    3. 青海省格尔木市畜牧兽医站, 格尔木 816000;
    4. 青海省格尔木市乌图美仁乡畜牧兽医站, 格尔木 816000
  • 收稿日期:2022-09-13 出版日期:2023-03-23 发布日期:2023-03-21
  • 通讯作者: 雷初朝,主要从事牛遗传资源研究,E-mail:leichuzhao1118@126.com
  • 作者简介:马志杰(1978-),男,甘肃张家川人,博士,主要从事高原动物遗传资源研究,E-mail:zhijiema@126.com
  • 基金资助:
    青海省自然科学基金项目(2021-ZJ-914);国家肉牛牦牛产业技术体系(CARS-37);青海省“昆仑英才·高端创新创业人才”计划项目

Y-chromosome Genomic Diversity and Paternal Origins of Qaidam Cattle and Mongolian Cattle

MA Zhijie1, WANG Shikang2, ZHANG Weizhong3, GUO Weixing1, ZHAO Haiming4, LEI Chuzhao2*   

  1. 1. Plateau Livestock Genetic Resources Protection and Innovative Utilization Key Laboratory of Qinghai Province, Key Laboratory of Livestock and Poultry Genetics and Breeding on the Qinghai-Tibet Plateau of Ministry of Agriculture and Rural Affairs, Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining 810016, China;
    2. College of Animal Science and Technology, Northwest Agriculture and Forestry University, Yangling 712100, China;
    3. Station of Animal Science and Veterinary Medicine of Golmud City of Qinghai Province, Golmud 816000, China;
    4. Station of Animal Science and Veterinary Medicine of Wutumeiren Town in Golmud City of Qinghai Province, Golmud 816000, China
  • Received:2022-09-13 Online:2023-03-23 Published:2023-03-21

摘要: 旨在从基因组水平探究柴达木牛和蒙古牛的父系遗传多样性和起源进化关系。本研究采用全基因组重测序技术对柴达木牛品种5个不同地理群体共计22个个体和蒙古牛23个个体的Y染色体单拷贝基因区进行SNP扫描,使用生物信息学方法分析其父系遗传多样性和系统发育关系。结果表明,22头柴达木牛共定义了4种单倍型,其单倍型多样度为0.610±0.093,核苷酸多样度为0.074±0.015,而23头蒙古牛共确定了10种单倍型,其单倍型多样度为0.925±0.025,核苷酸多样度为0.137±0.013,表明柴达木牛相比蒙古牛其父系遗传多样性较低。构建的系统发育树和单倍型网络图表明,22头柴达木牛明显地分为Y1(18.2%)和Y2(81.8%)两个单倍型组,其中Y2为优势单倍型组,Y2单倍型组又包括Y2a(18.2%)与Y2b(63.6%)两种亚单倍型组,其中Y2b亚单倍型组占优势,表明柴达木牛有Y1与Y2 两个父系起源;蒙古牛也拥有Y1(17.4%)和Y2(82.6%)两个父系起源,但Y2单倍型组以Y2a为主要亚单倍型组(47.8%)。上述结果表明,柴达木牛和蒙古牛具有相似的父系遗传组成,但考虑到柴达木牛的父系遗传多样性较低,故建议加大该品种内群体间种公牛的基因交流,提高其遗传多样性水平。本研究为明确柴达木牛和蒙古牛父系遗传差异,开展其种质资源的保护和开发利用提供了理论依据。

关键词: 柴达木牛, 蒙古牛, Y染色体基因组, SNP, 父系起源

Abstract: The study aimed to investigate the genetic diversity and evolutionary relationships of the sires from Qaidam cattle and Mongolian cattle at genomic level. In this study, the whole genome resequencing was used to scan the Y-chromosome single copy gene regions of a total of 22 individuals from 5 different geographical populations of the Qaidam cattle and 23 individuals from Mongolian cattle, and their paternal genetic diversity and phylogenetic relationship were analyzed using bioinformatics methods. The results showed that a total of 4 haplotypes were defined in 22 Qaidam cattle, with a haplotype diversity of 0.610±0.093 and a nucleotide diversity of 0.074±0.015, whereas a total of 10 haplotypes were identified in 23 Mongolian cattle, with a haplotype diversity of 0.925±0.025 and a nucleotide diversity of 0.137±0.013, indicating that Qaidam cattle had lower paternal genetic diversity compared to Mongolian cattle. The phylogenetic tree and haplotype network diagrams constructed showed that the 22 Qaidam cattle were clearly divided into two haplogroups, namely Y1 (18.2%) and Y2 (81.8%), of which Y2 was the dominant haplogroup, and the Y2 haplogroup included two sub-haplogroups, namely Y2a (18.2%) and Y2b (63.6%), of which the Y2b sub-haplogroup was dominant, indicating that the Qaidam cattle had both Y1 and Y2 paternal origins. Mongolian cattle also had both Y1 (17.4%) and Y2 (82.6%) paternal origins, but the Y2 haplogroup was dominated by the Y2a sub-haplogroup (47.8%). The above results suggest that Qaidam and Mongolian cattle have similar paternal genetic composition. However, considering the lower paternal genetic diversity of Qaidam cattle, it is suggested to increase the gene exchange of bulls from different populations within this breed for improving their genetic diversity. This study provides a theoretical basis for clarifying the paternal genetic differences between Qaidam cattle and Mongolian cattle, and for the conservation and exploitation of their germplasm resources.

Key words: Qaidam cattle, Mongolian cattle, Y chromosome genome, SNP, paternal origin

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