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基于SSR的藕莲新品种(系)指纹图谱构建

2020-03-31孙亚林朱红莲刘正位匡晶柯卫东

安徽农业科学 2020年4期

孙亚林 朱红莲 刘正位 匡晶 柯卫东

摘要  [目的]利用SSR分子标记构建藕莲品种(系)鉴定的DNA指纹图谱,为藕莲品种鉴定和新品种选育提供技术支持。[方法]利用SSR标记对9个莲藕新品种(系)进行鉴定,统计条带并进行遗传多样性分析,选择核心引物,建立DNA指纹图谱。[结果]从45对引物中筛选到9对多态性引物,对9个品种(系)扩增得到条带,共扩增出52条带,其中差异条带32条,多态性比率为61.54%,扩增片段大小为100~400 bp。选出4对SSR核心引物构建9个藕莲品种(系)的DNA指纹图谱。[结论]藕莲品种遗传多样性水平较低,4对引物组合所构建的DNA指纹图谱可用于藕莲品种鉴定。

关键词  藕莲;遗传多样性;指纹图谱;SSR标记

中图分类号  S  645.1文献标识码  A

文章编号  0517-6611(2020)04-0096-04

doi:10.3969/j.issn.0517-6611.2020.04.028

开放科学(资源服务)标识码(OSID):

Construction of Fingerprint Map for Root Lotus Varieties(Lines) by SSR

SUN Ya-lin,ZHU Hong-lian,LIU Zheng-wei et al  (Institute of Vegetable,Wuhan Academy of Agricultural Sciences,Wuhan,Hubei 430207)

Abstract  [Objective]With the aim to identify root lotus varieties,SSR molecular markers were used to get its DNA fingerprint map.[Method] SSR primers were screened out,the PCR and polyacrylamide gel electrophoresis were carried out for the 9 root lotus varieties,genetic diversity analysis were performed,and the core primers were selected to set up an identified fingerprint system.[Result]9 pairs of primer with clear band and high polymorphism were selected from 45 pairs of primer.A total of 52 bands were amplified from root lotus varieties,32 bands among them were polymorphic,the percentage of polymorphism band(PPB) was 61.54%.Four core primers were selected out to set up fingerprint of 9 root lotus varieties.[Conclusion]The genetic diversity of root lotus varieties was low,DNA fingerprint map constructed by 4 pairs of primer combinations can he used in the identification of  root lotus varieties.

Key words  Root lotus;Genetic diversity;Fingerprint map;SSR markers

蓮(Nelumbo nucifera Gaertn.)为莲科莲属多年生大型水生草本植物,根据莲的用途,可将莲分为3个类型,即藕莲、子莲、花莲,以采收肥大的地下根状茎为目的的称为藕莲,藕莲在我国栽培面积最大,是我国特色的水生经济作物。随着藕莲新品种的日益增多,加强品种识别与鉴定,确保品种的真实性和纯度,优化种植区域品种合理布局,提高生产效率具有重要意义。在生产过程中,品种鉴别主要靠植株高矮、花期、花色、藕的熟性、节间形状等来判断[1],由于受到不同产区气候、土壤、光照等影响,因此鉴定起来比较困难。品种鉴定不详不利于莲藕新品种的推广,阻碍了莲产业的健康发展。

SSR是一种基于PCR的分子标记,具有操作简单、丰富多态性、重演性高且呈共显性遗传而被广泛用于遗传图谱构建、遗传多样性分析与种质鉴定等方面[2]。……

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