新疆野生大环柄菇的分子鉴定与遗传多样性分析

Identification and genetic diversity of wild Macrolepiota in Xinjiang

  • 摘要: 【目的】 从分子水平研究鉴定新疆野生大环柄菇属菌株,分析其遗传多样性,为育种亲本材料的选择提供依据。 【方法】 采用ITS序列测定技术对供试菌株进行物种鉴定,并利用ISSR标记技术对17个野生大环柄菇菌株进行遗传多样性分析。 【结果】 供试的17个菌株均为裂皮大环柄菇Macrolepiota excoriata。筛选出的10条ISSR引物共扩增出了116条重复性较好,清晰的DNA条带,多态性条带总数为75条,多态比率约为64.66%。各供试菌株之间遗传相似性系数范围约在 0.71~0.99,当遗传相似性系数为0.85时,17个供试菌株可分为8个类群。 【结论】 裂皮大环柄菇在新疆也有分布,且其野生菌株具有比较丰富的遗传多样性。

     

    Abstract: 【Objective】 To identify and analyze their genetic diversity of wild strains of Macrolepiota in Xinjiang. Which can be used as a basis for the selection of parental materials for the next breeding research. 【Methods】 The ITS sequence was used to identify the species and the ISSR markers technology applied to carry out the genetic diversity analysis on 17 wild Macrolepiota strains. 【Results】 The 17 tested wild strains were the Macrolepiota excoriate, the screened-out 10 ISSR primers amplified a total of 116 clear DNA bands, including 75 polymorphic bands with a polymorphism ratio of 64.66%.The genetic similarity coefficient of each strain ranged from 0.71 to 0.99, and the 17 tested strains were divided into 8 groups at the genetic similarity coefficient of 0.85. 【Conclusion】 Macrolepiota excoriataalso is distributed in Xinjiang.and it has the occurrence of genetic differentiation with relatively rich genetic diversity.

     

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