Conflict between amino acid and nucleotide characters
Por:
Simmons M.P., Ochoterena H., Freudenstein J.V.
Publicada:
1 ene 2002
Resumen:
Slowly evolving characters, such as amino acids and replacement substitutions, have generally been favored over faster evolving characters for inferring phylogenetic relationships. However, amino acids constitute composite characters and, because of the degenerate genetic code, are subject to convergence. Based on an analysis of atpB and rbcL in 567 seed plants, we show that silent substitutions may be more phylogenetically informative than replacement substitutions and that artifacts caused by composite characters and/or convergence cause clades on amino acid trees to conflict with nucleotide trees and independent evidence. These findings indicate that coding nucleotide sequences only as amino acid characters for phylogenetic analysis provides little benefit and may yield misleading results. © 2002 The Willi Hennig Society.
Filiaciones:
Simmons M.P.:
Ohio State University Herbarium, 1315 Kinnear Road, Columbus, OH 43212, United States
Department of Biology, Colorado State University, Fort Collins, CO 80523, United States
Ochoterena H.:
Instituto de Biologia, UNAM, Apdo. Postal 70-367, Mexico City, CP 04510, Mexico
Freudenstein J.V.:
Ohio State University Herbarium, 1315 Kinnear Road, Columbus, OH 43212, United States
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