浙江农业学报 ›› 2025, Vol. 37 ›› Issue (2): 300-310.DOI: 10.3969/j.issn.1004-1524.20240344

• 园艺科学 • 上一篇    下一篇

37份辣椒种质资源的表型性状及SRAP遗传多样性分析

郭赛赛(), 聂智星, 傅鸿妃, 王同林, 邵志勇, 王宏, 郑积荣()   

  1. 杭州市农业科学研究院 蔬菜研究所,浙江 杭州 310024
  • 收稿日期:2024-04-12 出版日期:2025-02-25 发布日期:2025-03-20
  • 作者简介:郑积荣,E-mail:topzheng2003@163.com
    郭赛赛(1994—),女,山东高密人,硕士,农艺师,主要从事辣椒育种工作。E-mail:1437956541@qq.com
  • 通讯作者: 郑积荣
  • 基金资助:
    杭州市农科院科技创新与示范推广基金项目(2022HNCT-02);杭州市农业科技协作与创新攻关项目“山地蔬菜关键技术研究与示范”

Phenotypic characters and SRAP genetic diversity analysis of 37 pepper germplasm resources

GUO Saisai(), NIE Zhixing, FU Hongfei, WANG Tonglin, SHAO Zhiyong, WANG Hong, ZHENG Jirong()   

  1. Institute of Vegetable, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China
  • Received:2024-04-12 Online:2025-02-25 Published:2025-03-20
  • Contact: ZHENG Jirong

摘要:

对37份辣椒种质材料的22个表型性状进行统计学分析,通过SRAP分子标记进行遗传多样性分析,分别基于表型性状观测数据和SRAP分子标记进行聚类分析。种质间的22个表型性状存在差异,平均变异系数为44.49%,平均香农多样性指数为2.00;共提取了7个主成分,可以代表辣椒种质表型性状81.48%的遗传信息;基于果实形状分为短羊角椒、长羊角椒和灯笼椒3个类群;筛选出的17对SRAP引物的平均Nei’s基因多样性指数、香农多样性指数及遗传相似系数分别为0.42、0.61和0.75;基于SRAP分子标记在遗传相似系数0.86处将37份辣椒分为5个类群。37份辣椒种质资源表型性状表现形式丰富,具有丰富的遗传多样性,但结合SRAP分子标记可知供试材料种质资源同质化,需要引进其他类型的种质资源,为品种选育提供改良空间。结合形态学观测和SRAP分子标记辅助辣椒新品种选育,筛选出具有优良性状的种质资源,提高亲本的选择效率,充分利用杂种优势提高育种精准度。

关键词: 辣椒, 表型性状, 聚类分析

Abstract:

Based on 37 pepper germplasm resources,22 characters were analyzed statistically,and genetic diversity was analyzed by SRAP molecular markers. Cluster analysis was conducted based on observed phenotypic characters data and SRAP molecular markers respectively. There were significant differences in 22 phenotypic characters among pepper germplasm, the mean coefficient of variation and Shannon diversity index were 44.49% and 2.00, respectively. Seven principal components could represent 81.48% of genetic information of phenotypic characters. The test germplasm resources could be divided into three groups based on fruit shape, including short sheep horn pepper, long sheep horn pepper and lantern pepper. The average Nei’s gene diversity index, Shannon diversity index and genetic similarity coefficient of the 17 SRAP primers were 0.42, 0.61 and 0.75, respectively. Based on SRAP molecular markers, 37 pepper germplasm resources were divided into 5 groups with a genetic similarity coefficient of 0.86. Thirty-seven pepper germplasm resources exhibit diverse phenotypic characters and rich genetic diversity, but SRAP molecular markers show that the germplasm resources of the tested materials are homogenized. We should introduce other types of germplasm resources for variety breeding. It could improve the selection efficiency of parents and fully utilize hybrid advantages to enhance the breeding accuracy by combining phenotypic characters observation and SRAP molecular markers assisted pepper breeding.

Key words: pepper, phenotypic character, cluster analysis

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