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首页> 外文期刊>Molecular phylogenetics and evolution >Using phylogenomics to reconstruct phylogenetic relationships within tribe Polygonateae (Asparagaceae), with a special focus on Polygonatum
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Using phylogenomics to reconstruct phylogenetic relationships within tribe Polygonateae (Asparagaceae), with a special focus on Polygonatum

机译：使用系统核糖核桃殖殖殖殖殖殖殖殖殖殖殖殖殖殖科在部落多尼酰胺（Asparagaceae）中的系统发育关系，特别关注多谷蛋白

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摘要

Polygonatum is a widespread temperate genus with approximately 75 species centered in the Eastern Himalaya and Indo-Burma biodiversity hotspots. A complete assessment of the remarkable diversity of Polygonatum in these areas requires an accurate circumscription of the genus, as well as a clear understanding of generic and infrageneric relationships, both of which have been problematic in the past. In this study, we reconstruct phylogenetic relationships within Polygonatum and test its monophyly using a phylogenomic approach. For that, we built a comprehensive dataset that includes complete or nearly-complete plastid genomes of 19 species of Polygonatum, one of Disporopsis, and four of Heteropolygonatum. Their plastid genomes do not present any major structural differences and range from 153,821 to 155,580 bp in length. Molecular phylogenetic analyses of the chloroplast coding regions indicate that Polygonatum and Heteropolygonatum are monophyletic, providing support for their recognition as distinct genera and corroborating recent adjustments of their circumscriptions. An expanded analysis with higher species sampling using the petA-psbJ plastid gene region combined with the nuclear ribosomal ITS provided support for the recognition of three distinct sections within Polygonatum. These same sections are further supported by chromosome data: Polygonatum sect. Sibirica (x = 12); Polygonatum sect. Polygonatum (x = 9-11); and, Polygonatum sect. Verticillata (x = 13-15). Populations of P. multiflorum from northwestern Himalaya are here shown to be best treated as a separate taxon, P. govanianum. Furthermore, P. verticillatum is shown to be polyphyletic, indicating that it represents a species-complex that includes multiple Asiatic species. Despite that, additional studies are still needed until the proper nomenclatural adjustments can be made.
机译：多尼戈姆是一种广泛的温带属，在喜马拉雅州东部和印度缅甸生物多样性热点中集中了大约75种。完全评估这些区域中的多贡多元的多样性需要准确的属性，以及对普通和侵入性关系的清楚了解，这两者都是有问题的。在这项研究中，我们重建了多谷内的系统发育关系，并使用文学组织方法进行了一定的测试。为此，我们建立了一个综合数据集，包括19种多谷蛋白的完整或近乎完全的体积基因组，其中一个杂卵巢和四种杂卵巢。它们的塑性基因组不具有任何主要的结构差异和长度为153,821至155,580bp。叶绿体编码区的分子系统发育分析表明，多谷蛋白和杂多元是单味的，提供识别的识别，作为不同的属，并证实其周围的近期调整。使用PETA-PSBJ Plastid基因区域的较高物种采样的扩展分析与核核糖体相结合，其提供了识别多糖内的三个不同切片的支持。通过染色体数据进一步支持这些相同的部分：兼容性派。 Sibirica（x = 12）;伟业。 polygonatum（x = 9-11）;而且，伟物教派。 Verticillata（x = 13-15）。来自喜马拉雅西北部的P. Multiflorum的人群在这里被证明是最好被视为一个单独的分类，P. govanianum。此外，P. Verticillatum被证明是多骨，表明它代表了包含多种亚叶种的物种复合物。尽管如此，仍需要额外的研究，直到可以进行适当的命名性调整。

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