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GrainGenes Reference Report: GNM-45-991

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Reference	GNM-45-991
Title	Phylogenetic analysis of North American Elymus and the monogenomic Triticeae (Poaceae) using three chloroplast DNA data sets
Journal	Genome
Year	2002
Volume	45
Pages	991-1002
Author	Mason-Gamer RJ Orme NL Anderson CM
Abstract	Summary: Although the monogenomic genera of the Triticeae have been analyzed in numerous biosystematic studies, the allopolyploid genera have not been as extensively studied within a phylogenetic framework. We focus on North American species of Elymus, which, under the current genomic system of classification, are almost all allotetraploid, combining the St genome of Pseudoroegneria with the H genome of Hordeum. We analyze new and previously published chloroplast DNA data from Elymus and from most of the monogenomic genera of the Triticeae in an attempt to identify the maternal genome donor of Elymus. We also present a cpDNA phylogeny for the monogenomic genera that includes more data than, and thus builds on, those previously published. The chloroplast DNA data indicate that Pseudoroegneria is the maternal genome donor to all but one of the Elymus individuals. There is little divergence among the Elymus and Pseudoroegneria chloroplast genomes, and as a group, they show little divergence from the rest of the Triticeae. Within the monogenomic Triticeae, the problematic group Thinopyrum is resolved as monophyletic on the chloroplast DNA tree. At the intergeneric level, the data reveal several deeper-level relationships that were not resolved by previous cpDNA trees
External Databases	Pubmed: 12502243
Keyword	[ Hide all but 1 of 28 ] canada chloroplast chloroplast dna chloroplast genome divergence dna donor elongatum elymus genome genome analysis gramineae hordeum molecular-data sets origin perennial triticeae phylogenetic analysis phylogeny poaceae polyploidy pseudoroegneria rapd markers repetitive dna system systematics thinopyrum bessarabicum trees triticeae

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