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首页> 外文期刊>Genetica >Landscape conservation genetics of Dipteryx alata (“baru” tree: Fabaceae) from Cerrado region of central Brazil
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Landscape conservation genetics of Dipteryx alata (“baru” tree: Fabaceae) from Cerrado region of central Brazil

机译：巴西中部塞拉多地区Dipteryx alata（“ baru”树：豆科）的景观保护遗传学

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In this paper random amplified polymorphic DNA (RAPD) was used to evaluate the degree of among-population differentiation and associated spatial patterns of genetic divergence for Dipteryx alata Vogel populations from Cerrado region of central Brazil, furnishing support for future programs of conservation of this species. We analyzed patterns of genetic and spatial population structure using 45 RAPD loci scored for 309 trees, sampled from five different regions with two populations each. Genetic structure analysis suggested that panmixia null hypothesis can be rejected, with significant among-population components of 15%. Hierarchical partition by Analysis of Molecular Variance (AMOVA) shows that 5% of genetic variation is within regions, whereas 10% of variation is among regions, and these results were confirmed by a Bayesian analyses on HICKORY. The Mantel correlogram revealed that this divergence is spatially structured, so that local populations situated at short geographic distances could not be considered independent units for conservation and management. However, genetic discontinuities among populations were found in the northwest and southeast parts of the study area, corresponding to regions of recent socio-economic expansion and high population density, respectively. Taking both geographic distances and genetic discontinuities into account it is possible to establish a group of population to be conserved, covering most of D. alata geographic distribution and congruent with previously established priority areas for conservation in the Cerrado region.
机译：本文使用随机扩增多态性DNA（RAPD）评估巴西中部Cerrado地区Dipteryx alata Vogel种群的种群分化程度和相关的遗传多样性空间格局，为该物种的未来保护计划提供支持。我们使用来自五个不同区域的两个种群的309棵树评分的45个RAPD基因座分析了遗传和空间种群结构的模式。遗传结构分析表明，全混虫零假设可以被拒绝，在人口中有15％的重要组成部分。通过分子变异分析（AMOVA）进行的分层划分显示，遗传变异的5％位于区域内，而变异的10％位于区域间，这些结果通过对HICKORY的贝叶斯分析得到了证实。芒特尔相关图显示，这种差异是空间结构的，因此位于较短地理距离的本地人口不能被视为独立的保护和管理单位。但是，在研究区域的西北部和东南部发现了种群间的遗传不连续性，分别对应于近期社会经济扩张和高人口密度的地区。考虑到地理距离和遗传不连续性，有可能建立一组需要保护的种群，涵盖D. alata的大部分地理分布，并与塞拉多地区先前确定的优先保护区域相吻合。

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