Abstract
In this study, microsatellite markers were utilized to reveal the genetic diversity of 56 strains of Lentinula edodes grown in China. A total of 224 DNA bands were detected through 25 primer pairs, of which, 223 bands (99.6%) were polymorphic between two or more strains. The variation in SSR (Simple Sequence Repeat) DNA band patterns and average genetic similarity among the wild strains of L. edodes obtained from the same region uncovered a vast genetic diversity in the natural germplasm found in China. Compared with L. edodes strains from other areas, the genetic diversity of those from the Yunnan Plateau, Hengduanshan mountains, Taiwan, and south China was significantly greater. Based on cluster analysis and principal coordinate analysis, the results indicated that all L. edodes strains could be divided into three major groups. These results effectively displayed the differences between the strains from North and South China, and those from the same or adjoining regions could cluster preferentially into small groups in most cases, suggesting the positive correlation between the cluster results and the geographical origin for the natural germplasm of Chinese L. edodes. To our knowledge, this is a pioneering report on the utilization of the SSR marker technique in analyzing L. edodes’ genetic diversity.
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