Aliso: A Journal of Systematic and Evolutionary Botany Volume 22 | Issue 1 Article 7 2006 Placing the Monocots: Conflicting Signal from Trigenomic Analyses Melvin R. Duvall Northern Illinois University Sarah Matthews Harvard University Neill Mohammad University of Michigan Tammy Russel Northern Illinois University Follow this and additional works at: http://scholarship.claremont.edu/aliso Part of the Botany Commons Recommended Citation Duvall, Melvin R.; Matthews, Sarah; Mohammad, Neill; and Russel, Tammy (2006) "Placing the Monocots: Conflicting Signal from Trigenomic Analyses," Aliso: A Journal of Systematic and Evolutionary Botany: Vol. 22: Iss. 1, Article 7. Available at: http://scholarship.claremont.edu/aliso/vol22/iss1/7 Basal Monocots ~£?t~QCOTSogy and Evolution Excluding Poales Aliso 22, pp. 79-90 © 2006, Rancho Santa Ana Botanic Garden PLACING THE MONOCOTS: CONFLICTING SIGNAL FROM TRIGENOMIC ANALYSES 1 3 MELVIN R. DUVALL, ,4 SARAH MATHEWS,2 NEILL MOHAMMAD, AND TAMMY RUSSELL 1 1Department of Biological Sciences, Northern Illinois University, DeKalb, Illinois 60115, USA; 2The Arnold Arboretum of Harvard University, 22 Divinity Avenue, Cambridge, Massachusetts 02138, USA; 3Department of Political Science, University of Michigan, Ann Arbor, Michigan 48109, USA 4Corresponding author (
[email protected]) ABSTRACT Despite recent significant advances in understanding angiosperm phylogeny, the position of mono cots remains uncertain. We present here a phylogeny inferred from four genes that unambiguously unite monocots with eumagnoliids. A well-supported position for the monocots was obtained only after we replaced the available nuclear 18S rDNA sequence data with data from phytochrome C in a matrix that also included plastid rbcL and ndhF and mitochondrial atp 1. Over 5000 base pairs of sequence data from 42 taxa were analyzed using Bayesian inference.