Rhododendron kuomeianum (Ericaceae), a new species from northeastern Yunnan (China), based on morphological and genomic data.

Rhododendron kuomeianum (Ericaceae), a new species from northeastern Yunnan (China), based on morphological and genomic data.
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基于形态学和基因组数据的杜鹃花(杜鹃花科),来自中国云南东北部的一个新种

DOI:
10.1016/j.pld.2021.04.003
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发表时间:
2021-08
期刊:
影响因子:
4.8
通讯作者:
Ma YP
Ma YP
中科院分区:
生物学2区
文献类型:
--
作者:
Chang YH;Yao G;Neilsen J;Liu DT;Zhang L;Ma YP

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峨眉杜鹃Chang,J. Nielsen & Y. P. Ma,杜鹃花亚组内的一个新种。本文描述了产于云南省宜良县的杜鹃花组中的马登花属植物。新种与R. valentinianum,但它可以很容易地通过其叶片背面的稀疏鳞片,每花序的花较少和白色花冠具浅红色边缘来区分。在萼裂片宽度、叶片形状、叶柄毛被特征等方面与线瓣杜鹃也存在差异。结果表明,郭美杜鹃是与瓦氏杜鹃和红杜鹃亲缘关系较近的一个新种。根据限制性位点相关DNA测序(RAD-seq)数据,对本小节中的10个物种进行了基因组研究。这些基因组分析也澄清了先前由形态学分析提出的本小节中的其他分类学问题。我们的研究结果为使用下一代测序来探索系统发育关系和识别新物种提供了强有力的理由,特别是在具有复杂分类问题的植物群中。
Rhododendron kuomeianum Y.H. Chang, J. Nielsen & Y.P. Ma, a new species of Rhododendron (Ericaceae) within subsect. Maddenia in sect. Rhododendron from Yiliang County, NE Yunnan, China, is described and illustrated. The new species is similar to R. valentinianum, but it can be easily distinguished by its sparse scales on the abaxial surface of the leaf blade, fewer flowers per inflorescence and white corolla with pale red margins. There are also differences in the widths of calyx lobes, leaf blade shape and indumentum characteristics of the petiole between the new species and Rhododendron linearilobum. We confirmed that R. kuomeianum is a new species closely related to R. valentinianum and R. changii with phylogenomic studies of 10 species within this subsection based on restriction site-associated DNA sequencing (RAD-seq) data. These phylogenomic analyses also clarified additional taxonomic problems in this subsection previously raised by morphological analysis. Our findings make a strong case for using next-generation sequencing to explore phylogenetic relationships and identify new species, especially in plants groups with complicated taxonomic problems.
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