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 spec...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(RADseq)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.展开更多
基金the National Natural Science Foundation of China(Grant No.31770418 and No.31760231)the Youth Innovation Promotion Association,Chinese Academy of Sciences(Grant No.2018428)the Reserve Talents for Academic and Technical Leaders of Middle-aged and Young People in Yunnan Province(Grant No.2018HB066).
文摘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(RADseq)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.
