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植物研究 ›› 2018, Vol. 38 ›› Issue (2): 292-297.doi: 10.7525/j.issn.1673-5102.2018.02.018

• 研究报告 • 上一篇    下一篇

椭圆叶花锚简化基因组的SSR信息分析及SSR引物开发

王久利1,2, 陈世龙1, 邢睿1, 宋相杰3, 朱明星3, 张发起1,4   

  1. 1. 中国科学院高原生物适应与进化重点实验室, 中国科学院西北高原生物研究所, 西北生态环境资源研究院, 西宁 810008;
    2. 中国科学院大学, 北京 100039;
    3. 青海大学生态环境工程学院, 西宁 810016;
    4. 青海省作物分子育种重点实验室, 西宁 810008
  • 收稿日期:2017-09-21 出版日期:2018-03-15 发布日期:2018-03-23
  • 通讯作者: 张发起 E-mail:fqzhang@nwipb.cas.cn
  • 作者简介:王久利(1991-),男,博士研究生,主要从事植物学方面的研究。
  • 基金资助:
    国家自然科学基金(31400322);青海省应用基础研究计划(2016-ZJ-761);青海省自然科学基金青年基金(2015-ZJ-925Q);青海省作物分子育种重点实验室(2017-ZJ-Y14)

Simplified Genome SSR Information and Development of SSR Primers of Halenia ellipitica(Gentianaceae)

WANG Jiu-Li1,2, CHEN Shi-Long1, XING Rui1, SONG Xiang-Jie3, ZHU Ming-Xing3, ZHANG Fa-Qi1,4   

  1. 1. Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Xining 810008;
    2. University of the Chinese Academy of Sciences, Beijing 100039;
    3. College of Ecology-Environment Engineering, Qinghai University, Xining 810016;
    4. Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Xining 810008
  • Received:2017-09-21 Online:2018-03-15 Published:2018-03-23
  • Supported by:
    National Natural Science Foundation of China(31400322); Applied Basic Research Programs of Qinghai Province(2016-ZJ-761); The Natural Science Foundation of Qinghai Province(2015-ZJ-925Q);Qinghai Provincial Key Laboratory of Crop Molecular Breeding (2017-ZJ-Y14)

摘要: 基于RAD-seq简化基因组测序技术获得椭圆叶花锚(Halenia ellipitica D.Don)简化基因组水平上的序列信息并开发SSR分子标记。利用SR search软件检测而得到双端各有至少100 bp的五种类型的SSR(二、三、四、五、六核苷酸)位点共6 201个,并成功设计其中3 865个SSR引物。在能成功设计引物的SSR位点中,三核苷酸SSR位点最多;重复序列长度包括17种(12~36 bp);重复序列的基序共达316种,其中五核苷酸基序种类最多(91种)。从中挑选65对可对应五种SSR类型的引物,经梯度PCR检验后,利用椭圆叶花锚的4个居群32个个对可扩增的引物进行PCR和聚丙烯酰氨凝胶电泳检测,其中14对引物能在绝大多数个体中扩增,且13对具多态性。13个多态性位点的等位基因数量均值为5.462,多态性较高且不连锁(P<0.05);其中10个位点在多数居群中偏离哈迪温伯格平衡(P<0.01)且存在较高的纯合子数量(观测杂合度Ho均值0.226);近交系数在-0.443~1,均值为0.656;基因流Nm为0.474。

关键词: 椭圆叶花锚, RAD-seq, SSR分子标记, 简化基因组测序

Abstract: The restriction-site associated DNA sequencing(RAD-seq) technology was used to analyze simple sequence repeats(SSR) information of Halenia ellipitica D. Don; SSR markers for this species were developed based on RAD-seq data. We identified 6 201 SSR loci with at least 100 bp at two ends, including five types(di-nucleotide, tri-nucleotide, tetra-nucleotide, penta-nucleotide, and hexa-nucleotide). Primers of 3 865 loci were designed successfully. Among which, amount of tri-nucleotide SSR loci is the most. Repeat motif type number is 316, and type number of penta-nucleotide motif is the most(91). Afterward, 65 designed primers were randomly selected to represent the five SSR types, and tested using annealing temperature gradient PCR. Subsequently, 32 individuals from four natural populations of H. elliptica were employed to estimate the SSR primers that can be amplified. One monomorphic and 13 polymorphic SSR loci were developed according to the result of PCR and Polyacrylamide gel electrophoresis. The number of alleles of the 13 polymorphic SSR loci is high(mean 5.462), and no linkage relation was found(P<0.01); ten loci deviate from HWE(P<0.01) and have many homozygotes(observed heterozygosity mean of 0.226); the range of inbreeding coefficient is in -0.443-1(mean of 0.656); the gene flow Nm is 0.474.

Key words: Halenia ellipitica, RAD-seq, SSR molecular marker, simplified genome sequencing

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