Minh Nguyen Duc, Lan Phan Nguyen Hong, Minh Nguyen Tam
Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam.
Faculty of Biotechnology, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam.
AoB Plants. 2022 Feb 23;14(2):plac007. doi: 10.1093/aobpla/plac007. eCollection 2022 Apr.
Anthropogenic disturbances in tropical forests often affect the genetic diversity of a species. is an endangered species in the tropical forests of south-eastern Vietnam, both from its over-exploitation and habitat loss. Therefore, knowledge of population genetic diversity and population structure is essential for identifying the species conservation measures. In the present study, we evaluated genetic diversity and population structure using nine microsatellites for 183 individual trees from eight populations, representing the distribution range of in Vietnam. Two clustering approaches (Bayesian analysis and discriminant analysis of principal components) revealed that all studied individuals clustered into three genetic groups, which were related to gene flow across the range of in the lowland tropical forests of south-eastern Vietnam. Limited gene flow was implicated in anthropogenic disturbance. Genetic differentiation among populations was relatively low (the Weir and Cockerham index of 0.122 and the Hedrick index of 0.149) and showed significant differentiation. The genetic variability of the populations was low ( = 0.298 and = 0.324), which suggested the negative effects of habitat degradation and over-exploitation. Our studies also determined that populations can have undergone recent bottlenecks. We recommend conservation activities for this species based on these results.
热带森林中的人为干扰常常影响物种的遗传多样性。[物种名称]是越南东南部热带森林中的濒危物种，这是由过度开发和栖息地丧失共同导致的。因此，了解种群遗传多样性和种群结构对于确定物种保护措施至关重要。在本研究中，我们使用9个微卫星标记对来自8个种群的183棵个体树进行分析，这些种群代表了[物种名称]在越南的分布范围，以此评估其遗传多样性和种群结构。两种聚类方法（贝叶斯分析和主成分判别分析）表明，所有研究个体聚为三个遗传组，这与越南东南部低地热带森林中[物种名称]分布范围内的基因流有关。有限的基因流与人为干扰有关。种群间的遗传分化相对较低（韦尔和科克伦指数为0.122，赫德里克指数为0.149），但显示出显著差异。种群的遗传变异性较低（[具体遗传多样性指标1]=0.298，[具体遗传多样性指标2]=0.324），这表明栖息地退化和过度开发产生了负面影响。我们的研究还确定[物种名称]种群可能经历了近期的瓶颈效应。基于这些结果，我们为该物种推荐了保护措施。
