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RNA Editing and Phylogenetic Reconstruction in Two Monocot Mitochondrial Genes
Gitte Petersen, Ole Seberg, Jerrold I. Davis and Dennis W. Stevenson
Vol. 55, No. 4 (Nov., 2006), pp. 871-886
Published by: International Association for Plant Taxonomy (IAPT)
Stable URL: http://www.jstor.org/stable/25065682
Page Count: 16
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The mitochondrial genome of land plants has a high level of evolutionary plasticity that may impair its use in phylogenetic analyses. Among the most challenging properties are RNA editing and retroprocessing of edited mRNA into the mitochondrial and/or nuclear genome as processed paralogs. Using mtDNA sequence data encoding for apocytochrome B (cob) and the alpha subunit of F1-ATP synthase (atp1) across the monocots, and in two subclades, alismatids and Agavaceae, it is shown that edited sites, despite being more homoplasious than non-edited sites, perform well on the trees, and that they are not randomly distributed among taxa but have a clade specific distribution. Indirect evidence for the presence of processed paralogs is presented and their likely evolutionary fate discussed.
Taxon © 2006 International Association for Plant Taxonomy (IAPT)