In order to explore the genetic diversity of Dalbergia odorifera in Hainan, 185 individual trees of D. odorifera collected from 23 locations in the eastern, western, southern, northern and central regions of Hainan Province were collected for analysis of their genetic diversity by using a molecular marker system, SRAP. The results showed that a total of 174 sites were detected by using the 25 pairs of SRAP primers screened previously, and that their polymorphic sites were 92, with a polymorphism rate of 52.8％.The UPGMA cluster analysis showed that the genetic similarity coefficient between the 185 individual trees of D. odorifera collected in Hainan and Dalbergia rimosa Roxb was 0.56. When the similarity coefficient was 0.73, the accessions of D. odorifera germplasm collected in Hainan could be divided into four groups. The SRAP molecular marker system could reveal the genetic diversity of D. odorifera growing in Hainan. This study provided a molecular systematic basis for the classification system and evolutionary relationship, and for the protection and rational utilization of the D. odorifera resources in Hainan.%为探讨海南降香檀遗传多样性,以采自海南省东、西、南、北、中五个区域23个点185份降香檀单株材料为材料,采用SRAP分子标记对其遗传多样性进行分析.结果表明:利用筛选出的25对SRAP引物组合,扩增共检测到174个位点,多态性位点92个,多态率为52.8％.UPGMA聚类分析结果表明,185份海南降香檀种质材料与对照多裂黄檀遗传相似系数为0.56;在相似系数约为0.73处,可将收集到降香檀种质划分为4个类群.SRAP标记可较好地反映海南降香檀种质间的遗传多样性,为合理保护和利用海南降香檀种质资源提供科学依据与借鉴,并为海南降香檀分类系统和进化关系提供分子系统学依据.
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