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Phylogeny of Polygoneae (Polygonaceae: Polygonoideae)
Author(s) -
Schuster Tanja M.,
Reveal James L.,
Kron Kathleen A.
Publication year - 2011
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.1002/tax.606010
Subject(s) - polygonum , polygonaceae , ndhf , botany , biology , clade , molecular phylogenetics , tribe , taxon , phylogenetics , ecology , gene , genetics , sociology , anthropology
Genera included in Polygoneae such as Atraphaxis, Duma, Fallopia, Muehlenbeckia, Polygonella, Polygonum, Oxygonum , and Reynoutria are investigated using a molecular framework. Previous morphological studies had indicated that Polygonum is composed of sections Duravia, Polygonum , and Pseudomollia with the genus Polygonella included as a subsection of Polygonum sect. Duravia . One nuclear (nrITS) and three chloroplast ( matK, ndhF, trnL–trnF ) regions were analyzed with Maximum Parsimony and Maximum Likelihood methods to address evolutionary relationships within the tribe. The results show that Polygoneae is composed of three main clades: Knorringia as sister to all other taxa within Polygoneae, a clade of Reynoutria and Fallopia + Muehlenbeckia , and their sister clade of Atraphaxis, Duma , and Polygonum . The currently accepted sections within Polygonum are recovered and Polygonum sect. Duravia is sister to sections Polygonum and Pseudomollia. With Polygonella included in Polygonum , the appropriate new combinations and names are proposed. In addition, a few species of Polygonum are transferred to Atraphaxis . Oxygonum is not supported as a member of Polygoneae and its exact position awaits additional data.