Abstract
Random amplified polymorphic DNA (RAPD), inter-simple sequence repeat (ISSR) and sequence-related amplified polymorphism (SRAP) markers were used to evaluate the genetic diversity among 23 elite Lentinula edodes strains in China. A total of 138, 77 and 144 bands were detected by 16 RAPD primers, 5 ISSR primers and 23 SRAP primer combinations, among which 58.8%, 73.5% and 56.3% was polymorphic, respectively. By UPGMA clustering, a dendrogram was constructed based on each analysis. The three dendrograms showed that 23 L. edodes strains were clustered into three or four groups. The grouping exhibited similar structure and was generally consistent with their pedigrees. Twenty-three L. edodes strains shared great similarity indicated that the low level of genetic diversity of L. edodes strains and their relationship between each other. The important source of breeding material, such as wild and exotic types, must be introduced in order to broaden genetic base and decreases genetic vulnerability of L. edodes.
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