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观光木种群遗传多样性研究
引用本文:黄久香,庄雪影.观光木种群遗传多样性研究[J].植物生态学报,2002,26(4):413-0.
作者姓名:黄久香  庄雪影
作者单位:华南农业大学林学院,广州,510642
基金项目:香港嘉道理农场暨植物园生物多样性奖学金项目
摘    要: 应用随机扩增多态DNA(RAPD)标记方法检测了广东南昆山和车八岭、广西靖西和海南霸王岭等4个观光木种群的遗传多样性。利用45个10聚寡核苷酸引物共检测出224个位点,其中多态位点175个,占78.13%,4个种群的遗传多态位点百分率分别为47.89%(海南)、53.96%(靖西)、55.00%(车八岭)和56.35%(南昆山)。观光木的遗传多样性分析结果显示,Shannon 指数为0.3565,其中36.58%来自种群间, 63.42%来自种群内; Nei指数为0.2597,种群间的遗传分化系数(GST

关 键 词:观光木  自然种群  遗传多样性  随机扩增多态D
修稿时间:2001年8月6日

GENETIC DIVERSITY OF THE POPULATIONS OF TSOONGIODENDRON ODORUM
HUANG Jiu-Xiang and ZHUANG Xue-Ying.GENETIC DIVERSITY OF THE POPULATIONS OF TSOONGIODENDRON ODORUM[J].Acta Phytoecologica Sinica,2002,26(4):413-0.
Authors:HUANG Jiu-Xiang and ZHUANG Xue-Ying
Abstract:Genetic diversity of four populations of Tsoongiodendron odorum, Nankunshan and Chebaling of Guangdong Province, Jingxi of Guangxi, and Bawangling of Hainan Province was examined by Random Amplified Polymorphic DNA (RAPD). A total of 224 sites were detected from 108 individuals in four populations by 45 10_mer primers, 175 of which were polymorphic (78.13%). Polymorphic percentage of the four populations was 47.89% (Hainan), 53.96% (Jingxi), 55.00%(Chebaling), and 56.35% (Nankunshan), respectively. Species diversity indicated by Shannon index was 0.3565, 36.58% of which was from the inter_populations, 63.42% of which was from the inner_populations. Species diversity indicated by Nei index was 0.2597 and the coefficient of gene differentiation ( G ST ) among the populations was 0.2701. The genetic distance between Chebaling and Jingxi population was the largest (0.2775) while that between the two populations of Guangdong province, Nankunshan and Chebaling, was the smallest (0.0590). It was concluded from the present study that there exists high genetic diversity in the natural populations of T. odorum. Low genetic diversity is not a key factor threatening its natural populations. The major factors threatening the development of T. odorum include direct damage to natural population due to destruction of habitat and poor regeneration ability caused by innate biological and ecological characteristics.
Keywords:T  odorum    Natural population  Genetic diversity  RAPD
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