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首页> 外文期刊>Botanical Journal of the Linnean Society >Genetic diversity and ecological niche modelling of the restricted Recordia reitzii (Verbenaceae) from southern Brazilian Atlantic forest
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Genetic diversity and ecological niche modelling of the restricted Recordia reitzii (Verbenaceae) from southern Brazilian Atlantic forest

机译：巴西南部大西洋森林受限制的Recordia reitzii（Verbenaceae）的遗传多样性和生态位建模

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摘要

Genetic diversity analyses, coupled with ecological niche modelling (ENM) of species with a restricted distribution, may provide valuable information for understanding diversification patterns in endangered areas. We analyzed the genetic diversity of Recordia reitzii, a tree restricted to the threatened and highly fragmented Brazilian Atlantic forest, using three intergenic cpDNA spacers and ten microsatellite (SSR) loci. To assess the historical processes that may have influenced the distribution of extant R.reitzii populations, the current potential distributions of R.reitzii and Recordia boliviana, a closely related species, were modelled and projected onto the Last Glacial Maximum (LGM) and Last Interglacial (LIG) periods. Niche divergence was quantified between these two. The cpDNA and SSR data showed a north-south pattern of the diversity distribution and structured populations, suggesting that gene flow is probably limited. According to our data, R.reitzii exhibits low genetic diversity, which may be a result of a founder or distribution-reduction effect, narrow distribution or small population size. The ecological niche models showed a wider palaeodistribution during the LIG and a retraction during the LGM for both species. Tests of niche divergence and conservatism indicated that bioclimatic factors might have influenced the diversification of these Recordia species.(c) 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 176, 332-348.
机译：遗传多样性分析，再加上分布受限的物种的生态位建模（ENM），可能为了解濒危地区的多样化模式提供有价值的信息。我们使用三个基因间的cpDNA间隔子和十个微卫星（SSR）位点分析了Recordia reitzii的遗传多样性，Recordia reitzii是一棵仅限于濒临灭绝的巴西大西洋森林的树。为了评估可能影响现存R.reitzii种群分布的历史过程，对R.reitzii和Recordia boliviana（一个密切相关的物种）的当前潜在分布进行了建模，并将其投影到Last Glacial Maximum（LGM）和Last Interglacial （LIG）期间。两者之间的生态位差异被量化。 cpDNA和SSR数据显示了多样性分布和结构种群的南北格局，表明基因流可能受到限制。根据我们的数据，R.reitzii表现出较低的遗传多样性，这可能是由于创始人或减少分布的影响，狭窄的分布或较小的人口规模造成的。生态位模型显示了两种物种在LIG期间的古生物分布较宽，在LGM期间的收缩。生态位差异和保守性的测试表明，生物气候因素可能影响了这些Recordia物种的多样性。（c）2014伦敦林奈学会，林奈学会植物学杂志，2014，176，332-348。

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