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Conservation Value of Sites of Hybridization in Peripheral Populations of Rare Plant Species

机译：珍稀植物外围种群杂交位点的保护价值

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Abstract: Populations at the periphery of a species’ range are of interest to conservation biologists because they can show marked genetic differentiation from populations at the center of a range and because of potential hybridization among rare and common species. We examined two closely related Cyclamen species. One is a narrow endemic, and the other is more geographically widespread (both protected by law in continental southern France). We used floral traits and genetic variability to test for hybridization among the species in peripheral populations of the rare species. The species co-occurred on Corsica in a disjunct, peripheral part of the distribution of the endemic species and in an ecologically marginal area for the widespread species. The two species have hybridized and the endemic species showed high levels of introgression with its widespread congener. Genetic and floral variability in sites with both species was markedly higher than in sites with a single species. Our results highlight the need for a conservation strategy that integrates hybrid populations because they represent a source of novel diversity that may have adaptive potential.
机译：摘要：保护生物学家对物种范围外围的种群感兴趣，因为它们可以显示出与该范围中心种群明显的遗传分化，并且由于稀有和常见物种之间可能发生杂交。我们研究了两个紧密相关的仙客来物种。一个是狭narrow的地方病，另一个在地理上更广泛（均在法国南部大陆受法律保护）。我们使用花卉特征和遗传变异性来测试稀有物种外围种群中物种之间的杂交。该物种共存于科西嘉岛，是地方特有物种分布的分离，外围部分，并且在广泛分布物种的生态边缘区域中共存。这两个物种已杂交，特有物种与其广泛的同源物表现出高水平的基因渗入。具有两个物种的位点的遗传和花卉变异性明显高于具有单个物种的位点。我们的研究结果突出表明，需要一种将杂种种群整合在一起的保护策略，因为它们代表了可能具有适应潜力的新颖多样性的来源。

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