浙江农业学报 ›› 2023, Vol. 35 ›› Issue (2): 319-328.DOI: 10.3969/j.issn.1004-1524.2023.02.09

• 园艺科学 • 上一篇    下一篇

基于转录组序列的芜菁SSR标记开发及应用

李晓娟1,2(), 赵文菊1,2, 赵孟良1,2, 邵登魁1,2, 马一栋1,2, 任延靖1,2,*()   

  1. 1.青海省农林科学院,青海 西宁 810016
    2.青海省蔬菜遗传与生理重点实验室,青海 西宁 810016
  • 收稿日期:2021-11-02 出版日期:2023-02-25 发布日期:2023-03-14
  • 通讯作者: 任延靖
  • 作者简介:*任延靖,E-mail: renyan0202@163.com
    李晓娟(1997—),甘肃定西人,硕士研究生,研究方向为蔬菜遗传育种及分子生物学。E-mail:L889989L@163.com
  • 基金资助:
    青海省科技厅科技成果转化专项(2021-NK-124);国家自然科学基金(31960602);青海省科技厅重点实验室项目(2020-ZJ-Y02)

Development and application of SSR markers based on transcriptome sequencing of turnip (Brassica rapa ssp. rapa)

LI Xiaojuan1,2(), ZHAO Wenju1,2, ZHAO Mengliang1,2, SHAO Dengkui1,2, MA Yidong1,2, REN Yanjing1,2,*()   

  1. 1. Qinghai Academy of Agriculture and Forestry Sciences, Xining 810016, China
    2. Qinghai Key Laboratory of Vegetable Genetics and Physiology, Xining 810016, China
  • Received:2021-11-02 Online:2023-02-25 Published:2023-03-14
  • Contact: REN Yanjing

摘要:

为了研究芜菁(Brassica rapa L.)种质资源的多样性水平,本研究采用转录组测序的方法挖掘芜菁的SSR分子标记。结果表明:转录组测序分析共获得了253 720条unigene,其中13 247条unigene序列中含有2个或2个以上SSR位点,SSR的发生频率为25.05%,平均每3.15 kb出现1个SSR,分布频率为31.42%。30对引物最终均获得了多态性高、条带清晰的结果,共扩增出多态性条带有126条,平均每对引物扩增出4.2条,平均多态率100%。根据电泳检测扩增结果,最终得到24对多态性高、条带清晰的芜菁SSR引物,24对SSR引物在50份芜菁材料中共扩增获得了101个等位基因,平均每个位点等位基因数4.21个,分析显示,平均有效等位基因数(Ne)为1.481 7个,有效等位变异率为35.19%,这些结果表明,筛选出的引物能较好地表现50份芜菁的遗传多样性,同时对于更多芜菁品种的DNA指纹图谱构建和杂交种鉴定均具有重要意义。

关键词: 芜菁, 分子标记, 转录组, 遗传多样性

Abstract:

To investigate the level of diversity of turnips (Brassica rapa ssp. rapa) resources, transcriptome sequencing was used to explore the simple sequence repeat marker of turnip. The results showed that transcriptome sequencing analysis obtained 253 720 unigene and 13 247 unigene sequences contained 2 or more SSR sites. The frequency of SSR was 25.05%, with an average of 1 SSR per 3.15 kb, and a distribution frequency of 31.42%. All 30 primers eventually yielded high polymorphism and clear bands with a total of 126 polymorphism bands with an average of 4.2 pairs and 100% polymorphism. According to electrophoresis amplification results, 24 SSR primers with high polymorphism and clear bands were selected. Twenty-four SSR primers amplified 101 alleles in 50 turnip materials with an average of 4.21 alleles per locus. Analysis results showed that the average number of effective alleles (Ne) was 1.481 7 with an effective allele variation rate of 35.19%. These results showed that the selected primers could represent the genetic diversity of 50 turnips and played an important role in DNA fingerprint construction and hybrid identification of turnips.

Key words: turnip, molecular marker, transcriptome, genetic diversity

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