生物技术通报 ›› 2023, Vol. 39 ›› Issue (12): 136-147.doi: 10.13560/j.cnki.biotech.bull.1985.2023-0512

• 研究报告 • 上一篇    下一篇

52个马铃薯遗传多样性分析及SSR分子身份证构建

安苗1(), 王彤彤1, 付逸婷1, 夏俊俊1, 彭锁堂1,2, 段永红1()   

  1. 1.山西农业大学农学院,晋中 030600
    2.山西蓬勃农业科技股份有限公司,大同 037000
  • 收稿日期:2023-05-30 出版日期:2023-12-26 发布日期:2024-01-11
  • 通讯作者: 段永红,女,博士,副教授,研究方向:种质创新与遗传工程;E-mail: duanyonghongok@163.com
  • 作者简介:安苗,女,硕士,研究方向:种质创新与遗传工程;E-mail: an18434764024@qq.com
  • 基金资助:
    山西省基础研究计划项目(202203021211272);山西省重点研发计划项目(202102140601004);山西省现代农业产业技术体系建设专项资金资助(2023CYJSTX06-10);山西农业大学农学院育种工程专项(YZ2021-04);山西农业大学校市合作项目(2020HX51)

Genetic Diversity Analysis and Molecular Identity Card Construction by SSR Markers of 52 Solanum tuberosum L. Varieties(Lines)

AN Miao1(), WANG Tong-tong1, FU Yi-ting1, XIA Jun-jun1, PENG Suo-tang1,2, DUAN Yong-hong1()   

  1. 1. College of Ageonomy, Shanxi Agricultural University, Jinzhong 030600
    2. Shanxi Pengbo Agricultural Science and Technology Co., Ltd., Datong 037000
  • Received:2023-05-30 Published:2023-12-26 Online:2024-01-11

摘要:

马铃薯(Solanum tuberosum L.)种质资源遗传多样性评价是开展遗传育种的前提和基础,为探究马铃薯种质资源的遗传背景,进而为新品种的选育提供育种材料。以52个马铃薯品种(系)为研究材料,采用SSR标记分析亲缘关系,进而评价其遗传多样性,并构建指纹图谱。从25对SSR引物中筛选出多态性丰富、稳定性好的16对引物,并对52份马铃薯品种(系)进行SSR扩增分析,16对SSR引物扩增出147个多态性条带,引物平均多态条带比率为64.71%,平均Nei's遗传多样性(Nei's genetic diversity, H)和平均Shannon's指数(Shannon index, I)分别为0.14和0.24。在遗传相似系数0.23处,52份材料经聚类分析分为3大类,类群I包括49个品种(系),46个是北方品种(系),3个国外引进品种(系),均适宜晋北地区种植;类群II包括2个品种,‘北方016’和‘晋薯16号’,特点是薯皮黄色、干物质含量高;类群III仅包括‘晋薯15号’,在大类的划分上未按照地理来源进行聚类。在遗传相似系数0.36处,类群I又可以分为7个亚类。基于最少引物鉴定最多种质的原则,利用C59、S25、C33、S151共4对引物组合可区分全部供试品种,构建出基于SSR标记的数字化指纹图谱及分子身份证。利用SSR标记技术多态性引物可以评价马铃薯种质资源的遗传多样性,通过分子身份证能够准确鉴别以及溯源不同马铃薯品种(系)。

关键词: 马铃薯, 品种(系), 遗传多样性, SSR标记, 聚类分析, 指纹图谱, 分子身份证

Abstract:

The evaluation on the genetic diversity of potato germplasm resources(Solanum tuberosum L.)is the prerequisite and basis for genetic breeding, which may provide breeding materials for exploring the genetic background of potato germplasm resources and breeding new varieties. The genetic relationship and diversity of 52 potato varieties(lines)was evaluated by SSR markers, and the fingerprint was constructed. Sixteen primers with abundant polymorphism and good stability were selected from 25 pairs of SSR primers, and 147 polymorphic bands were amplified by 16 pairs of SSR primers from 52 potato varieties(lines), and the average polymorphic band ratio was 64.71%. The average Nei's genetic diversity(H)and Shannon's index(I)were 0.14 and 0.24, respectively. At the similar genetic coefficient of 0.23, the 52 potato materials were divided into three categories by cluster analysis. Group I included 49 varieties(lines), 46 varieties(lines)from North China, and 3 imported varieties(lines)from abroad, all of them were suitable for planting in North Shanxi province. Group II included two varieties, ‘Beifang 016’ and ‘Jinshu 16’, characterized by yellow potato skin and high dry matter content. Group III only included ‘Jinshu 15’, and was not clustered according to geographical origin. At the genetic similarity coefficient of 0.36, group I can be divided into 7 subclasses. Based on the principle of identifying the most varieties with the least primers, C59, S25, C33 and S151 were used to distinguish all varieties tested, and the digital fingerprints and molecular identity cards based on SSR markers were constructed. The genetic diversity of potato germplasm resources can be evaluated by using SSR markers, and different potato varieties(lines)can be accurately identified and traced by molecular identification cards.

Key words: potato, varieties(lines), genetic diversity, SSR markers, clustering analysis, fingerprints, molecular identity card