Genetic variation in central and peripheral populations of Excoecaria agallocha from Indo-West Pacific

被引：27

作者：

Zhang, Zhihong ^{[1
]}

Zhou, Renchao ^{[1
]}

Tang, Tian ^{[1
]}

Huang, Yelin ^{[1
]}

Zhong, Yang ^{[2
]}

Shi, Suhua ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Guangdong, Peoples R China

[2] Fudan Univ, Minist Educ, Key Lab Biodivers Sci & Ecol Engn, Sch Life Sci, Shanghai 200433, Peoples R China

来源：

AQUATIC BOTANY | 2008年 / 89卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Excoecaria agallocha; ocean current; genetic diversity; population genetic structure; central population; ISSR;

D O I：

10.1016/j.aquabot.2008.03.002

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Genetic diversity and differentiation were studied in Excoecaria agallocha L., a mangrove species growing on the coastlines of the Indo-West Pacific region. Twenty natural populations of E. agallocha were sampled from the Malay Peninsula (central population), and in Southern China, North Australia, Sri Lanka and Southern Japan (peripheral populations). Our results showed that central populations from Malay Peninsula possessed significantly higher genetic diversity than the peripheral ones (P < 0.05). Analysis of molecular variation (AMOVA) revealed that genetic variability was partitioned at 22.9% among regions, 23.6% among populations within regions, and 53.5% within populations. Genetic differentiation (G(ST) = 0.300) among the six central populations was stronger than those from peripheral regions. Populations from North Australia clustered closely together in the dendrogram and were distinct from the rest of the populations. Those from Southern Japan, Southern China and Sri Lanka also clustered closely together, respectively. However, populations from Malay Peninsula did not cluster by region. The east coast populations of Malay Peninsula (including Pasir population) were more genetically similar to the populations from Southern China than those from the west coastline of Malay Peninsula. Our study suggests that ocean currents, land barriers, limited dispersal ability of seeds, and founder effect may play important roles in the distribution of genetic diversity in E. agallocha. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：57 / 62

页数：6

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