Analysis of Genetic Diversity in Chinese Dracaena with SRAP Markers
The classification system of the genus of Dracaena is controversial.In the study,SRAP(sequence-related amplified polymorphism) molecular markers were used to detect the genetic diversity and relationship of 24 accessions of Dracaena Vandelli ex Linnaeus from China to provide new molecular basis for the system classification of this genus.A total of 580 DNA bands were amplified by 15 selective primer pairs,135 of which(87.10%) were polymorphic.The average number of polymorphic DNA bands amplified by each primer pair was 10.The genetic similarities of 24 materials ranged from 0.27 to 0.97.UPGMA method cluster analysis showed that 24 materials were classified into two cluster groups with the genetic similarity of 0.34.The result showed,one unnamed specie maybe was a allied genus plants,supporting the view that D.menglaensis is a variety of D.angustifolia.Combining with the morphological features,the genus of Dracaena of China could be divided into two groups.