畜牧兽医学报 ›› 2023, Vol. 54 ›› Issue (12): 4962-4971.doi: 10.11843/j.issn.0366-6964.2023.12.008

• 遗传育种 • 上一篇    下一篇

基于SNP芯片分析新浦东鸡的遗传多样性和遗传结构

齐丽娜1, 陆雪林1, 杨凯旋2, 周瑾1, 李先玉1, 刘珂1, 张文刚1, 顾欣1, 章伟建1*   

  1. 1. 上海市动物疫病预防控制中心, 上海 201103;
    2. 上海市农业科学院, 上海 201415
  • 收稿日期:2023-06-29 出版日期:2023-12-23 发布日期:2023-12-26
  • 通讯作者: 章伟建,主要从事畜牧技术推广与研究,E-mail:xumuke021@163.com
  • 作者简介:齐丽娜(1992-),女,河南三门峡人,畜牧师,主要从事畜牧技术推广与研究,E-mail:289269041@qq.com
  • 基金资助:
    上海市科技兴农项目(2021-02-08-00-12-F00787)

Analysis of Genetic Diversity and Genetic Structure of New Pudong Chicken Based on SNP Chips

QI Lina1, LU Xuelin1, YANG Kaixuan2, ZHOU Jin1, LI Xianyu1, LIU Ke1, ZHANG Wengang1, GU Xin1, ZHANG Weijian1*   

  1. 1. Shanghai Animal Disease Control Center, Shanghai 201103, China;
    2. Shanghai Academy of Agricultural Sciences, Shanghai 201415, China
  • Received:2023-06-29 Online:2023-12-23 Published:2023-12-26

摘要: 旨在探究新浦东鸡群体的遗传多样性、亲缘关系及家系结构。本研究采用"京芯一号"SNP芯片对368只新浦东鸡全基因组范围内的SNPs进行检测,对新浦东鸡的遗传结构、亲缘关系和近交系数进行了分析,以期揭示个体之间的亲缘关系。结果共得到55 023个SNPs,通过Plink软件质控,剩余42 267个有效SNPs,其中78%的SNPs具有多态性;各位点平均有效等位基因数为1.552,PIC为0.237,MAF为0.226,Ho为0.355,HE为0.353。新浦东鸡群体的平均IBS遗传距离为0.280 9,110只公鸡的平均IBS遗传距离为0.280 1。通过聚类分析(标准为亲缘关系系数大于等于0.1)构建新浦东鸡家系,110只公鸡被划分为32个家系。新浦东鸡个体ROH长度在0~350 Mb之间,其中,个体ROH长度在100~150 Mb内的个体数比例最大,基于ROH值计算的群体平均近交系数为0.155,近交程度较高。综上,本研究从基因组水平揭示了新浦东鸡的种群遗传结构和遗传多样性,可为后续的种群选育及开发利用工作提供参考。

关键词: 新浦东鸡, SNP芯片, 遗传多样性, 群体遗传结构

Abstract: The study aimed to explore the genetic diversity, relationship and family structure of the New Pudong chickens population. In order to reveal the genetic relationship between individuals, "Jingxin No.1" SNP chip was used to detect the SNPs in the whole genome of 368 New Pudong chickens. The genetic structure, genetic relationship and inbreeding coefficient of New Pudong chickens were also analyzed. The result showed that a total of 55 023 SNPs were obtained. According to the quality control of Plink (V1.90) software, there were 42 267 remaining SNPs, among which 78% were polymorphic. The effective allele number was 1.552, the PIC was 0.237, the MAF was 0.226, the HO was 0.355, and the HE was 0.353. The average IBS genetic distance of New Pudong chickens was 0.280 9. The average IBS genetic distance of 110 roosters was 0.280 1. According to the cluster analysis (the standard is that the coefficient of genetic relationship was greater than or equal to 0.1), 110 roosters were divided into 32 families. The ROH length of each New Pudong chicken were 0-350 Mb, and the proportion of individuals with ROH length of 100-150 Mb was the largest. The average inbreeding coefficient calculated based on ROH value was 0.155, indicating a high degree of inbreeding. According to these results, this study reveals the population genetic structure and genetic diversity of New Pudong chickens at the genomic level, which can provide reference for future breeding and utilization.

Key words: New Pudong chicken, SNP chip, genetic diversity, population genetic structure

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