Genetic Diversity Studies of Oxytropis glabra by ISSRs in Inner Mongolia

The genetic diversity of Oxytropis glabra DC.distributed in the western regions of Inner Mongolia was analyzed using inter simple sequence(ISSR) markers.327 bands were amplified from 6 natural populations by 14 reliable primers.A high level of genetic diversity was revealed.The Nei's gene diversity index was 0.197 2 and the Shannon diversity index was 0.328 7.The total gene diversity was 0.197 6,while the gene diversity within population was 0.165 3,83.67% of genetic variation existed within populations,while 16.33% of genetic variation existed among populations.The genetic differentiation coefficient was 0.163 3.The gene flow was 2.561 3.There was certain degree of differentiation among populations.However the genetic drift could not cause genetic differentiation.The UPGMA dendrogram indicated that populations with similar ecological and geographical conditions clustered first.