Detecition of Genetic Diversity of Stipa grandis in Inner Mongolia Using RAPD Markers

Random amplified polymorphic DNA(RAPD) analyses were used to estimate the genetic diversity of different populations of Stipa grandis and their distribution, as well as the ecological factors in relation to the genetic differentiation of S. grandis . Among a total of 134 bands perceived via 16 primers from 7 populations of S.grandis in different regions,120 bands or 89.55% are polymorphic, showing the high genetic variation of individuals. Most of the molecular variation(58.66%) of the 7 S.grandis populations exists within each of the populations, while only 41.34% exists among the populations. The specific loci of the 7 populations of S.grandis are closely related to their geographical distribution.