Studies on the characteristics and the geographical distribution diversity of wild buckwheat resources in Sichuan

After systematically investigating and collecting the wild buckwheat resources of more than 60 counties in 3 states and 3 areas of Sichuan,313 resources and 172 samples of 8 species,2 varieties,and 2 subspecies distributing different ecological areas were collected.The types,characteristics,primitive environmental diversity and two main distribution centers of wild buckwheat resources were defined in Sichuan,miniplasmids grassy F.urophyllum and red-flowered F.urophyllum were discovered the botanical features of F.x,F.y and F.z were not the same as the named-species,which were likely to be new species or varieties(undetermined).