生物技术通报 ›› 2025, Vol. 41 ›› Issue (8): 165-174.doi: 10.13560/j.cnki.biotech.bull.1985.2025-0208

• 研究报告 • 上一篇    

基于SCoT、SRAP和SSR分子标记的220份辣椒种质资源遗传多样性分析

裴红霞1(), 汪露瑶2, 李生梅3(), 高晶霞1()   

  1. 1.宁夏农林科学院园艺研究所,银川 750002
    2.浙江大学海南研究院,三亚 572025
    3.新疆农业职业技术大学,昌吉 831100
  • 收稿日期:2025-02-27 出版日期:2025-08-26 发布日期:2025-08-14
  • 通讯作者: 高晶霞,女,博士,副研究员,研究方向 :蔬菜遗传育种及栽培;E-mail: 774350762@qq.com
    李生梅,女,博士,讲师,研究方向:作物遗传育种与栽培;E-mail: 15899085203@qq.com
  • 作者简介:裴红霞,女,博士,副研究员,研究方向 :蔬菜遗传育种与栽培;E-mail: 810444147@qq.com
    第一联系人:共同第一作者
  • 基金资助:
    宁夏农林科学院科技创新先导-科技攻关项目(NKYG-25-18);宁夏自然科学基金项目(2023AAC03424)

Genetic Diversity of 220 Pepper Germplasm Resources Using SCoT, SRAP, and SSR Molecular Markers

PEI Hong-xia1(), WANG Lu-yao2, LI Sheng-mei3(), GAO Jing-xia1()   

  1. 1.Institute of Horticulture, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002
    2.Hainan Institute of Zhejiang University, Sanya 572025
    3.Xinjiang Agricultural Vocational and Technical University, Changji 831100
  • Received:2025-02-27 Published:2025-08-26 Online:2025-08-14

摘要:

目的 深入解析保存在宁夏农林科学院辣椒种质资源的遗传多样性和亲缘关系,为辣椒种质资源的引进、保护和应用提供重要的理论依据。 方法 采用SCoT、SRAP和SSR 3种分子标记技术,对收集于全国15个地区的220份辣椒种质资源进行遗传多样性分析。 结果 6个SCoT标记分别扩增出1‒4条条带,14个SRAP标记分别扩增出2‒4条条带,3个SSR标记分别扩增出2‒5条条带,且所有标记均表现出100%的多态性条带百分比。进一步分析发现,SSR标记的平均多态性信息指数(PIC)最高,达到0.77,显著高于SCoT(0.55)和SRAP(0.55),表明SSR标记在遗传多态性检测中更具优势,其中,HpmsE088为最优SSR标记。聚类分析、主坐标分析和群体遗传结构分析将15个地区的种质划分为两大类群(Group 1和Group 2),其中Group 1包含中国四川、中国辽宁、中国新疆、中国山东、中国宁夏和中国湖南的种质,Group 2则包括中国(云南、江苏、河南、甘肃、北京和安徽)、荷兰、日本和美国的种质。此外,83.2%的种质表现出较高的纯合性。果形特征与聚类分组存在一定的相关性,Group 1中线形果实的辣椒种质比例显著高于Group 2,而所有短牛角形果实的辣椒种质均被归入Group 2。 结论 保存在宁夏农林科学院的辣椒种质资源具有较高的遗传多样性,根据遗传信息主要可以被划分为2组。

关键词: 辣椒, 遗传多样性, SCoT标记, SRAP标记, SSR标记

Abstract:

Objective To comprehensively analyze the genetic diversity and phylogenetic relationships of pepper germplasm resources preserved at the Ningxia Academy of Agriculture and Forestry Sciences, providing a theoretical foundation for the conservation, introduction, and application of pepper germplasm resources. Method Genetic diversity analysis was conducted on 220 pepper germplasm resources from 15 regions across China using three molecular marker techniques: SSR, SRAP, and SCoT. Result Six SCoT markers amplified 1 to 4 bands, 14 SRAP markers amplified 2 to 4 bands, and 3 SSR markers amplified 2 to 5 bands, with all markers showing 100% polymorphic band percentages. Further analysis revealed that SSR markers had the highest average polymorphic information content (PIC) of 0.77, significantly higher than SCoT (0.55) and SRAP (0.55), indicating that SSR markers were more advantageous for detecting genetic diversity, with HpmsE088 being the most effective SSR marker. Cluster analysis, principal coordinate analysis, and population genetic structure analysis divided the germplasm from the 15 regions into two major groups (Group 1 and Group 2). Group 1 included germplasm from Sichuan, Shenyang, Xinjiang, Shandong, Ningxia, and Hunan in China, while Group 2 included germplasm from China (Yunnan, Jiangsu, Henan, Gansu, Beijing, and Anhui), Netherlands, Japan, and the United States. Additionally, 83.18% of the germplasm demonstrated high homozygosity. A correlation was observed between fruit shape characteristics and cluster grouping, with a significantly higher proportion of linear fruit pepper germplasm in Group 1 compared to Group 2, while all short horn-shaped fruit pepper germplasm were classified into Group 2. Conclusion The pepper germplasm resources preserved at the Ningxia Academy of Agriculture and Forestry Sciences show high genetic diversity and can be primarily divided into two groups based on genetic information. The findings provide a theoretical basis for future introduction strategies and parental selection.

Key words: pepper, genetic diversity, SCoT marker, SRAP marker, SSR marker