Caelestium genus novum (Polygonaceae, Polygoneae): evidence bаsed on the results of molecular phylogenetic analyses of tribe Polygoneae, established with consideration of the secondary structure of the ITS rDNA regions

Yurtseva, O.V.; Mavrodiev, E.V.

Авторы: Yurtseva O.V., Mavrodiev E.V.
Журнал: Новости систематики высших растений
Том: 50
Год издания: 2019
Первая страница: 47
Последняя страница: 79
DOI: 10.31111/novitates/2019.50.47
Аннотация: The genus Bactria, recently described to house Atraphaxis ovczinnikovii from the Pamir and Bactria lazkovii from the Central Tien Shan, may also include Polygonum tianschanicum from the Eastern Tien Shan. In order to re-circumscribe Bactria and to clarify the place of P. tianschanicum in tribe Polygoneae, we performed Maximum Likelihood and Bayesian analyses of combined regions of the plastid genome and ITS1–2 regions of nrDNA for 58 species of tribe Polygoneae, with special attention to the secondary structure of pre-rRNA of the ITS1&2 loci. In all our analyses, Bactria lazkovii and P. tianschanicum formed a highly supported clade, sister to Bactria ovczinnikovii in the plastid trees, but separate from the latter, as well as from the remaining genera in the ITS-based trees. Details of the secondary structure of pre-rRNA of the ITS1&2 loci also confirmed the close relationships of Bactria lazkovii and P. tianschanicum, quite different from Bactria ovczinnikovii. Based on the molecular analyses, details of the secondary structure of pre-rRNA of the ITS1&2 loci, fine morphological distinctions, and distributional data, we propose the new genus Caelestium Yurtseva & Mavrodiev, presumably of hybrid origin, to include C. lazkovii and C. tianschanicum.
Добавил в систему: Юрцева Ольга Витальевна

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Caelestium genus novum (Polygonaceae, Polygoneae): evidence bаsed on the results of molecular phylogenetic analyses of tribe Polygoneae, established with consideration of the secondary structure of the ITS rDNA regionsстатья

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