中国畜禽种业 ›› 2026, Vol. 22 ›› Issue (7): 38-44.doi: 10.19543/j.cnki.1673-4556.20260602.006cstr: 32418.14.j.cnki.1673-4556.20260602.006

• 生物技术 • 上一篇    下一篇

基于SNP芯片解析永胜红骨绵羊的群体遗传结构

李锦南1(), 王金明2(), 王识之1, 朱兰1, 杨冬梅2, 刘彩娟2, 杨开梅2, 陈浩林3, 邵庆勇1()   

  1. 1. 云南省畜牧兽医科学院,云南 昆明 650224
    2. 永胜县畜牧站,云南 丽江 674200
    3. 贵州省畜牧兽医研究所,贵州 贵阳 550050
  • 收稿日期:2025-11-17 出版日期:2026-07-26 发布日期:2026-07-18
  • 通讯作者: 邵庆勇 E-mail:jinnan_li@outlook.com;shaoqingyong@163.com
  • 作者简介:
    李锦南(1997—),男,云南昆明人,助理研究员,主要从事动物遗传育种与遗传资源评价鉴定工作,E-mail:#共同第一作者
    李锦南(1997—),男,云南昆明人,助理研究员,主要从事动物遗传育种与遗传资源评价鉴定工作,E-mail:#共同第一作者
    王金明(1975—),男,云南永胜人,高级兽医师,主要从事牛羊科学养殖及畜禽粪污资源化利用工作,E-mail:
  • 基金资助:
    云南省科技人才与平台计划(202505AF350008); 永胜红骨绵羊资源鉴定、评价与利用(2023HT015); 国家肉羊产业技术体系建设项目(CARS-38-36)

Analysis of population genetic structure of Yongsheng Red-bone sheep based on SNP chip

Jinnan Li1(), Jinming Wang2(), Shizhi Wang1, Lan Zhu1, Dongmei Yang2, Caijuan Liu2, Kaimei Yang2, Haolin Chen3, Qingyong Shao1()   

  1. 1. Yunnan Animal Science and Veterinary Institute, Kunming, 650224, Yunnan
    2. Yongsheng Animal Husbandry Station, Lijiang, 674200, Yunnan
    3. Guizhou Animal Science and Veteirnary Institute, Guiyang, 550050, Yunnan
  • Received:2025-11-17 Online:2026-07-26 Published:2026-07-18
  • Contact: Qingyong Shao E-mail:jinnan_li@outlook.com;shaoqingyong@163.com

摘要:

目的 为探究永胜红骨绵羊的遗传背景,揭示其与云南及周边绵羊资源的关联性与独特性,为云南地方绵羊资源的鉴定及保护提供科学依据。 方法 本试验使用OvineSNP50芯片对24只永胜红骨绵羊进行基因分型,并以6个云南地方绵羊品种、西藏羊和威宁绵羊作参照,通过系统发育树构建、主成分分析、血统分析、连续纯合片段(Runs of homozygosity, ROH)检测以及遗传分化指数计算等方法系统解析永胜红骨绵羊的群体遗传结构。 结果 使用Illumina OvineSNP50芯片进行基因分型,9个绵羊群体共216个个体经质控后保留46129个高质量SNP用于后续分析。系统发育树结果显示,永胜红骨绵羊在树形上独立于其他绵羊群体。主成分分析结果显示,永胜红骨绵羊能与迪庆绵羊、兰坪乌骨绵羊、宁蒗黑绵羊、威宁绵羊区分开,分化程度相对较高。ADMIXTURE软件分析结果显示,K=7是9个绵羊群体的最佳模拟祖先血统预测数量,永胜红骨绵羊有独特的祖先血统结构,其中部分个体血统存在混杂。ROH统计结果显示,该群体ROH长度主要集中在2~3 Mb,群体近交系数(FROH)为0.0953。永胜红骨绵羊与兰坪乌骨绵羊的遗传分化指数(Fst)最小(0.0459),与其他绵羊群体之间的FST均大于0.06。 结论 综上,永胜红骨绵羊具有独特的群体遗传结构,与兰坪乌骨绵羊可能存在历史基因交流。

关键词: 永胜红骨绵羊, 遗传资源, 群体遗传结构, 种质资源鉴定

Abstract:

Objective This study aims to explore the genetic background of Yongsheng Red-bone sheep and to reveal their genetic relationship and specificality with respect to sheep resources in Yunnan and surrounding areas and provides a scientific basis for the identification and conservation of local sheep genetic resources in Yunnan. Method A total of 24 Yongsheng Red-bone sheep were genotyped using the OvineSNP50 BeadChip. Six local Yunnan sheep breeds, Tibetan sheep, and Weining sheep were used for references. The population genetic structure of Yongsheng Red-bone sheep was systematically analyzed through phylogenetic tree construction, principal component analysis, ancestry analysis, runs of homozygosity (ROH) detection, and calculation of genetic differentiation index. Result Genotyping was performed using the Illumina Ovine SNP50 chip. A total of 46,129 high-quality SNPs were retained for subsequent analysis after quality control of 216 individuals in 9 sheep populations. The phylogenetic tree showed that Yongsheng Red-bone sheep formed a distinct branch independent of other sheep populations. The results of principal component analysis showed that Yongsheng Rred-bone sheep could be distinguished from Diqing sheep, Lanping Black-bone sheep, Ninglang sheep and Weining sheep, and the degree of differentiation was relatively high. ADMIXTURE analysis revealed that K=7 was the optimal number of ancestral populations for the nine sheep populations, and Yongsheng Red-bone sheep exhibited a unique ancestral composition, with some individuals showing admixture. ROH analysis indicated that the ROH lengths in this population were mainly concentrated in the range of 2~3 Mb, with an inbreeding coefficient(FROH) of 0.0953. The smallest genetic differentiation index(Fst) occurred between Yongsheng Red-boned sheep and Lanping Black-bone sheep(0.0459), while those with other populations were all greater than 0.06. Conclusion In summary, Yongsheng Red-bone sheep possess a unique population genetic structure and may have experienced historical gene flow with Lanping Black-bone sheep.

Key words: Yongsheng Red-bone sheep, Genetic resource, Population genetic structure, Genetic resource identification

中图分类号: 

  • S826

表1

各绵羊群体样本信息"

群体Population name 缩写Abbreviation 采样地点Sampling location 采样时间Sampling time 样本量Sample size/个
永胜红骨绵羊Yongsheng Red-bone sheep YS 云南省丽江市永胜县 2023.10 24
迪庆绵羊Diqing sheep DQ 云南省迪庆州香格里拉市 2023.10 24
兰坪乌骨绵羊Lanping Black-bone sheep LP 云南省怒江州兰坪县 2023.08 24
宁蒗黑绵羊Ninglang Black sheep NL 云南省丽江市宁蒗县 2023.08 24
石屏青绵羊Shiping Cyan sheep SP 云南省红河州石屏县 2023.09 24
腾冲绵羊Tengchong sheep TC 云南省保山市腾冲市 2023.06 15
西藏羊Tibetan sheep TIB 西藏自治区昌都市 - 37
威宁绵羊Weining sheep WN 贵州省毕节市威宁县 2024.8 24
昭通绵羊Zhaotong sheep ZT 云南省昭通市昭阳区 2023.10 20

图1

各群体系统发育树"

图2

主成分分析"

图3

不同K值的交叉验证误差"

图4

9个绵羊群体祖先血统构成"

图5

9个绵羊群体在不同ROH长度类别中的平均总和"

图6

永胜红骨绵羊不同ROH长度类别中的数量分布情况"

图7

9个绵羊群体FROH分布情况 注:图中黑色圆形为平均数所在位置。"

表2

9个绵羊群体间遗传分化指数"

群体

Populations

石屏青绵羊

SP

腾冲绵羊

TC

永胜红骨绵羊

YS

迪庆绵羊

DQ

兰坪乌骨绵羊

LP

昭通绵羊

ZT

宁蒗黑绵羊

NL

威宁绵羊

WN

西藏绵羊

TIB

石屏青绵羊SP
腾冲绵羊TC 0.1578
永胜红骨绵羊YS 0.1203 0.1089
迪庆绵羊DQ 0.1102 0.1041 0.0601
兰坪乌骨绵羊LP 0.0940 0.0889 0.0459 0.0327
昭通绵羊ZT 0.1046 0.0981 0.0627 0.0475 0.0345
宁蒗黑绵羊NL 0.1188 0.1040 0.0642 0.0554 0.0426 0.0546
威宁绵羊WN 0.1132 0.0900 0.0611 0.0555 0.0431 0.0490 0.0542
西藏绵羊TIB 0.1399 0.1181 0.0869 0.0815 0.0689 0.0829 0.0814 0.0673
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