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首页> 外文期刊>植物研究雑誌 >Melanoseris henryi (Asteraceae-Cichorieae) Revisited: A New Record of Genus and Species from the Flora of Lao PDR with Its Systematic Position
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Melanoseris henryi (Asteraceae-Cichorieae) Revisited: A New Record of Genus and Species from the Flora of Lao PDR with Its Systematic Position

机译:回顾黑变种(菊科-菊苣科):来自老挝人民民主共和国植物区系的属和种的新记录及其系统地位

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摘要

Melanoseris henryi (Dunn) N. Kilian 、Astemceae-Cichorieae、 is reported for the first time for the Bolaven Plateau of southern Laos (Champasak province). Hitherto this rare species was only known from the type collection made at Pu,er, in southern Yunnan, China, at the end of the 19th century, where it has not been recollected since. This is also the first record for the genus Melanoseris from Laos. The phylogenetic analysis based on DNA sequences of nuclear ribosomal internal transcribed spacer (nrlTS) confirms the placement in the Flora of China of this species with 3-6-flowered capitula in the revived Melanoseris. Within the Melanoseris lineage, M. henryi clusters into a clade together with Melanoseris atwpurpnrea, M. likiangensis, and M. macrantha, all species with many-flowered capitula, which is sister to a clade of two species with 3-flowered capitula, M. tenuis and M graciliflora. In our molecular phylogeny statistical support of the relationships within the Melanoseris lineage is, however, weak. A description and illustrations of Melanoseris henryi, which is also rare in southern Laos, are provided. The presence of Melanoseris in southern Laos provides new clues to illuminate the history of the geographical distribution and the evolutionof this lineage, and even the relationships between the floras of southwestern China and southern Laos.
机译:首次报道老挝南部(占巴塞省)的波拉文高原的黑腹黑穗病(Dunn)N. Kilian,Astemceae-Cichorieae。迄今为止,这种稀有物种仅在19世纪末在中国云南南部普,市进行的类型收集中才知道,此后一直未进行过收集。这也是老挝Melanoseris属的第一个记录。根据核糖体内部转录间隔子(nrlTS)的DNA序列进行的系统发育分析,证实了这种具有3-6朵花的小头蝶在恢复的黑素病中在中国植物区系中的位置。在Melanoseris世系中,M。henryi与Melanoseris atwpurpnrea,M。likiangensis和M. macrantha一起聚成进化枝,所有物种都具有多花的capitula,这是两个具有3朵开花的capitula的进化枝的姊妹。 tenuis和M graciliflora。在我们的分子系统发育学中,Melanoseris世系内的关系的统计支持很弱。提供了对黑腹黑猩猩的描述和插图,这在老挝南部也很少见。老挝南部的黑变种的存在提供了新的线索,以阐明该地区的地理分布和演化史,甚至揭示了中国西南部和老挝南部植物区系之间的关系。

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