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Phylogenetic relationships among Puccinellia and allied genera of Poaceae as inferred from chloroplast DNA restriction site variation
Author(s) -
Choo Meng Keong,
Soreng Robert J.,
Davis Jerrold I
Publication year - 1994
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1994.tb15417.x
Subject(s) - biology , monophyly , botany , phylogenetic tree , clade , cladistics , sister group , restriction site , chloroplast dna , zoology , restriction enzyme , genetics , dna , gene
A cladistic analysis of chloroplast DNA restriction site variation among accessions of Catabrosa P. Beauv., Phippsia (Trin.) R. Br., Sclerochloa P. Beauv., and Puccinellia Pari, resolved a monophyletic Puccinellia , with Sclerochloa as its sister group, Phippsia the sister of the Puccinellia + Sclerochloa clade, and Catabrosa situated more distantly. These results suggest that the taxonomic fusion of Phippsia and Puccinellia , which has been proposed in light of the existence of natural hybrids between them (currently recognized as the nothogenus × Pucciphippsia Tsvelev), would yield a grouping that would not be monophyletic unless Sclerochloa also was included. The set of restriction site characters that resolve these relationships provides minimal support for species groupings within Puccinellia , and the groupings that are resolved are inconsistent in some cases with species boundaries as determined by morphology and isozymes.