Phylogenetic analysis of Dioscorea (Dioscoreaceae) from Japan and adjacent regions based on plastid and nuclear DNA sequences, with special reference to the taxonomic status of selected taxa
Phylogenetic analysis of Dioscorea (Dioscoreaceae) from Japan and adjacent regions based on plastid and nuclear DNA sequences, with special reference to the taxonomic status of selected taxa
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基于质体和核 DNA 序列对日本及邻近地区的薯蓣科 (Dioscoreaceae) 进行系统发育分析，特别参考所选类群的分类地位
DOI：
10.1093/botlinnean/boab052
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发表时间：
2022
影响因子：
2.4
通讯作者：
M. N.
中科院分区：
文献类型：
--
作者：
Noda;H.;Fuse;S.;Yamashita;J.;Poopath;M.;Pooma;R. and Tamura;M. N.
为了阐明日本薯蓣亚群之间的系统发育关系，并重新审视基于这些关系的分类学，我们对日本所有薯蓣亚群和邻近地区的选定类群的四个质体区域[trnK(包括matK)、rbcL、atpBandtrnL-F]和两个核区域(PHYC和18S rDNA)进行了分子系统发育分析。尽管物种通常是同域的，并且物种内叶片形状的变化相对较宽，并且物种之间没有明确划分，但我们的结果表明 JapaneseDioscoreaspp.不杂交。我们的结果还解决了有关日本物种的几个分类学问题。我们确认D.粳稻，D.多穗属，D.伪粳稻和 D. tabatae 形态相似，是不同的物种。此外，来自大东群岛的植物被鉴定为D.据我们所知，从未观察到吕宋花开花，但其可归因于D。 pseudojaponica.Dioscorea zentaroana，通常被视为 D.的同义词。 Asclepiadea，被发现与后者不同。Dioscorea izuensis 应被视为 D.伊豆茄属。总之，本土薯蓣有16种和3个变种应在日本得到认可。
To clarify phylogenetic relationships among JapaneseDioscoreataxa and to re-examine taxonomy based on these relationships, we conducted molecular phylogenetic analyses of four plastid regions [trnK(includingmatK),rbcL,atpBandtrnL-F] and two nuclear regions (PHYCand 18S rDNA) for allDioscoreataxa from Japan and selected taxa from adjacent regions. Although species are often sympatric and variation in leaf shape is relatively wide within species and not clearly demarcated between species, our results suggest that JapaneseDioscoreaspp. do not hybridize. Our results also resolve several taxonomic issues surrounding Japanese species. We confirm thatD. japonica,D. polystachya,D. pseudojaponicaandD. tabatae, which are morphologically similar, are distinct species. Further, plants from the Daito Islands identified asD. luzonensis, which have never been observed to flower to our knowledge, are attributable toD. pseudojaponica.Dioscorea zentaroana, often treated as a synonym ofD. asclepiadea, was found to be distinct from the latter.Dioscorea izuensisshould be treated asD. collettiivar.izuensis. In conclusion, 16 species and three varieties of nativeDioscoreashould be recognized in Japan.