Gastrodia elata BI (Tian Ma in china), belonging to orchid family, is mainly distributed in Shichuan Province,Yunnan Province,Guizhou Province and northwest of china, northeast of china etal..It is also distributed extensively in Japan and Korea. Gastrodia elaba BI is a very important Chinese herbal medicine,which comprise the important medical component named. In this study,the genetic diversity was investigated by AFLP and ISSR in order to make further exploitation on Gastrodia elata B1. Moreover...