Genetic structure and diversity of Shorea obtusa (Dipterocarpaceae) in Thailand  

作　　者：Chadaporn SENAKUN Suchitra CHANGTRAGOON Pairot PRAMUAL Preecha PRATHEPHA 

机构地区：[1]Walairukhavaj Botanical Research Institute, Mahasarakham University [2]Forest Genetic Conservation and Biotechnology Research Division, Forest and Plant Conservation Research Office, National Park, Wildlife and Plant Conservation Department [3]Department of Biology, Faculty of Science, Mahasarakham University [4]Department of Biotechnology, Faculty of Technology, Mahasarakham University

出　　处：《Journal of Systematics and Evolution》2011年第2期120-125,共6页植物分类学报（英文版）

基　　金：supported by the Thailand Research Fund/Biodiversity Research and Training Special Program for Biodiversity Research;Training grant BRT T251154 and Mahasarakham University (grant year 2008)

摘　　要：Shorea obtusa is a keystone species of the dry deciduous dipterocarp forest in Thailand. In this study, the genetic structure and diversity of this species were evaluated by means of five microsatellite markers. A total of 146 trees were collected from five populations encompassing major forest regions of Thailand. High levels of genetic diversity were found among the five populations with the average He of 0.664. Genetic differentiations between populations, although significant, were low with approximately 3% of genetic variation partitioned among populations. This may indicate that the populations sampled were recently part of a continuous population. A tree constructed using the unweighted pair group method with arithmetic average, based on Nei＇s genetic distance, divided the populations into three groups. This separation was consistent with the altitudinal zonation of the populations, thus indicating that altitude might play a significant role in the genetic structure of S. obtusa. Areas of high genetic diversity were identified which could be considered priorities for conservation.Shorea obtusa is a keystone species of the dry deciduous dipterocarp forest in Thailand. In this study, the genetic structure and diversity of this species were evaluated by means of five microsatellite markers. A total of 146 trees were collected from five populations encompassing major forest regions of Thailand. High levels of genetic diversity were found among the five populations with the average He of 0.664. Genetic differentiations between populations, although significant, were low with approximately 3% of genetic variation partitioned among populations. This may indicate that the populations sampled were recently part of a continuous population. A tree constructed using the unweighted pair group method with arithmetic average, based on Nei＇s genetic distance, divided the populations into three groups. This separation was consistent with the altitudinal zonation of the populations, thus indicating that altitude might play a significant role in the genetic structure of S. obtusa. Areas of high genetic diversity were identified which could be considered priorities for conservation.

关 键 词：deciduous dipterocarp forest genetic diversity MICROSATELLITE Shorea obtusa Thailand. 

分 类 号：Q943[生物学—植物学]