Genetic diversity and structure of the critically endangered tree Dimorphandra wilsonii and of the widespread in the Brazilian Cerrado Dimorphandra mollis: Implications for conservation

被引：34

作者：

Viana e Souza, Helena A. ^{[1
]}

Lovato, Maria Bernadete ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Biol Geral, Inst Ciencias Biol, BR-31270901 Belo Horizonte, MG, Brazil

来源：

BIOCHEMICAL SYSTEMATICS AND ECOLOGY | 2010年 / 38卷 / 01期

关键词：

Brazilian Cerrado; Conservation genetics; Dimorphandra wilsonii; Dimorphandra mollis; Endangered species; Genetic structure; Genetic variation; ISSR; INTEGRATED SOFTWARE; RARE; DIFFERENTIATION; INDIVIDUALS; MARKERS; NUMBER; RAPD;

D O I：

10.1016/j.bse.2009.12.038

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We performed a comparative analysis of the genetic diversity and structure of two congeneric tree species, one critically endangered, with only 21 known individuals in the wild, Dimorphandra wilsonii, and the other widely distributed Dimorphandra mollis. Eight populations of D. mollis and all known trees of D. wilsonii, from three areas, were screened for variability with ISSR markers. Percentage of polymorphic bands, Nei's gene diversity and Shannon's index were considerably lower in D. wilsonii (P = 40.0%, h = 0.124 and I = 0.190), as compared to D. mollis (P = 70.4%, h = 0.190 and I = 0.297). Bayesian clustering showed that D. wilsonii individuals are clustered in three populations, which had high differentiation among them. Several measures for their conservation were suggested: protection of all extant populations, ex situ conservation of seeds, production of saplings in nurseries and foundation of new populations in reserve areas. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：49 / 56

页数：8

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