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首页> 外文期刊>Caryologia: Giornale de Citologia, Citosistematica e Citogenetica >High genetic diversity and presence of genetic structure characterise the endemics Ruta corsica and Ruta lamarmorae (Rutaceae)
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High genetic diversity and presence of genetic structure characterise the endemics Ruta corsica and Ruta lamarmorae (Rutaceae)

机译：高遗传多样性和遗传结构的存在表征了NoTemics Ruta Corsica和Ruta Lamarmorae（芸香粉）

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摘要

Corsica and Sardinia form one of the areas with highest biodiversity in the Mediterranean and are considered one of the priority regions for conservation in Europe. In order to preserve the high levels of endemism and biological diversity at different hierarchical levels, knowledge of the evolutionary history and current genetic structure of Corso-Sardinian endemics is instrumental. Microsatellite markers were newly developed and used to study the genetic structure and taxonomic status of Ruta corsica and Ruta lamarmorae, rare endemics of Corsica and Sardinia, respectively, and previously considered a single species. Our analyses identified high levels of genetic variation within each species (P=0.883, H-e =0.543 for R. corsica; P=0.972, H-e =0.627 for R. lamarmorae). Intrinsic traits of the species (hermaphroditism, proterandry and polyploidy) and island-dependent factors (i.e. age, origin and history of the islands) might explain the detected high levels of genetic variation. We discovered differentiation between R. corsica and R. lamarmorae, and genetic structure within each species, which are consistent with the observation of low dispersal ability for both species. Our genetic results support the recent taxonomic classification of R. corsica and R. lamarmorae as separate species and suggest that they diverge at only few loci. One R. corsica population (SA) strongly differed from all other studied populations and appeared to be the product of hybridization between the two species in STRUCTURE analyses. Our results provide important insights for the conservation of the two rare endemics. Further genetic analyses are recommended for R. lamarmorae and for population SA (R. corsica).
机译：科西嘉岛和撒丁岛是地中海生物多样性最高的地区之一，被认为是欧洲优先保护的地区之一。为了在不同的等级层次上保持高水平的地方性和生物多样性，了解科尔索撒丁岛地方性的进化历史和当前的遗传结构非常重要。微卫星标记是新近发展起来的，用于研究科西嘉和拉马尔莫雷的遗传结构和分类地位，这是科西嘉和撒丁岛的罕见特有种，以前被认为是单一物种。我们的分析确定了每个物种内的高水平遗传变异（科西嘉红豆杉的P=0.883，H-e=0.543；拉马尔莫红豆杉的P=0.972，H-e=0.627）。物种的内在特征（雌雄同体、变形和多倍体）和岛屿相关因素（即岛屿的年龄、起源和历史）可能解释了检测到的高水平遗传变异。我们发现了科西嘉红豆杉和拉玛红豆杉之间的差异，以及每个物种内部的遗传结构，这与观察到的两个物种的低扩散能力相一致。我们的遗传结果支持最近将科西嘉岛红豆杉和拉马尔莫雷红豆杉作为独立物种进行的分类，并表明它们仅在很少的位点上分化。一个科西嘉种群（SA）与所有其他研究种群有很大差异，在结构分析中似乎是这两个物种杂交的产物。我们的研究结果为保护这两种稀有特有物种提供了重要的见解。建议对拉马尔莫雷氏菌和SA群体（科西嘉雷氏菌）进行进一步的遗传分析。

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