Studies on diversity of wild Fragaria species in Yunnan, China

Wild strawberry populations are distributed extensively in Yunnan province in China, where some Fragaria species, variations and types were discovered from 2247 to 3663 m. Based on flow cytometric measurement of the DNA content, branching of stolons, sex expression, other morphological traits, the geographic distribution, and EST-SSR, SSR markers data, the species of the genus Fragaria in Yunnan and their phylogeny are discussed. Among 39 accessions, there are diploids and tetraploids, which show sympodial and monopodial branching. In tetraploid species, there are female and male plants. Based on EST-SSR and SSR data, a dendrogram was constructed using UPGMA method, the 39 accessions were classified into 2 groups based on the similarity coefficient at 0.7. The results show that genetic polymorphism of Fragaria germplasm in Yunnan is relatively abundant, and the relationships among the 39 accessions are defined.