Sequence-related amplified polymorphism (SRAP) marker as a new method for identification of endophytic fungi from Taxus

文献类型： 外文期刊

第一作者： Ren, Na

作者： Ren, Na;Liu, Jiajia;Yang, Dongliang;Hong, Juan;Chen, Jianhua;Luan, Mingbao

作者机构：

关键词： Sequence-related amplified polymorphism (SRAP);Endophytic fungi;Taxus;Cluster analysis

期刊名称：WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY （ 影响因子：3.312； 五年影响因子：3.58 ）

ISSN： 0959-3993

年卷期： 2012 年 28 卷 1 期

页码：

收录情况： SCI

摘要： A total of 20 endophytic fungi stains were classified into four groups using traditional morphological identification method, and were studied for genetic diversity by sequence-related amplified polymorphism (SRAP) technique. Genomic DNA (deoxyribonucleic acid) of these strains was extracted with CTAB method. SRAP analysis was done with 24 pairs of primers. All strains could be uniquely distinguished with 584 bands and 446 polymorphism bands which generated 76.4% of polymorphic ratio. Unweighted pair-group method with arithmetical averages cluster analysis enabled construction of a dendrogram for estimating genetic distances between different strains. All strains, which were just divided into four groups by traditional morphology identification, were clustered into four major groups at GS = 0.603 and further separated into eight sub-groups at GS = 0.921. Dendrogram also revealed a large genetic variation in 20 strains; different primer combinations allowed them distinctly distinguished one from others with relatively low genetic similarity. The results show that the SRAP technology is more efficient than traditional morphology identification. It is found that SRAP markers could more really reflect the genetic diversity of endophytic fungi strains from Taxus, and also could be used as a method for identification of endophytic fungi from Taxus. It also suggests that SRAP can be used to establish foundation for further screening of taxol-producing endophytic fungi strains which can produce high levels of paclitaxel.

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