TY - JOUR
T1 - Phylogenetic analyses of basal angiosperms based on nine plastid, mitochondrial, and nuclear genes
AU - Qiu, Y.L.
AU - Dombrovska, O.
AU - Lee, J.
AU - Li, L.
AU - Whitlock, B.A.
AU - Bernasconi-Quadroni, F.
AU - Rest, J.S.
AU - Davis, C.C.
AU - Borsch, T.
AU - Hilu, K.W.
AU - Renner, S.S.
AU - Soltis, D.E.
AU - Soltis, P.E.
AU - Zanis, M.J.
AU - Cannone, J.J.
AU - Powell, M.
AU - Savolainen, V.
AU - Chatrou, L.W.
AU - Chase, M.W.
PY - 2005
Y1 - 2005
N2 - DNA sequences of nine genes (plastid: atpB, matK, and rbcL; mitochondrial: atp1, matR, mtSSU, and mtLSU; nuclear: 18S and 26S rDNAs) from 100 species of basal angiosperms and gymnosperms were analyzed using parsimony, Bayesian, and maximum likelihood methods. All of these analyses support the following consensus of relationships among basal angiosperms. First, Amborella, Nymphaeaceae, and Austrobaileyales are strongly supported as a basal grade in the angiosperm phylogeny, with either Amborella or Amborella and Nymphaeales as sister to all other angiosperms. An examination of nucleotide substitution patterns of all nine genes ruled out any possibility of analytical artifacts because of RNA editing and GC-content bias in placing these taxa at the base of the angiosperm phylogeny. Second, Magnoliales are sister to Laurales and Piperales are sister to Canellales. These four orders together constitute the magnoliid clade. Finally, the relationships among Ceratophyllum, Chloranthaceae, monocots, magnoliids, and eudicots are resolved in different ways in various analyses, mostly with low support. Our study indicates caution in total evidence approaches in that some of the genes employed (e.g., mtSSU, mtLSU, and nuclear 26S rDNA) added signal that conflicted with the other genes in resolving certain parts of the phylogenetic tree
AB - DNA sequences of nine genes (plastid: atpB, matK, and rbcL; mitochondrial: atp1, matR, mtSSU, and mtLSU; nuclear: 18S and 26S rDNAs) from 100 species of basal angiosperms and gymnosperms were analyzed using parsimony, Bayesian, and maximum likelihood methods. All of these analyses support the following consensus of relationships among basal angiosperms. First, Amborella, Nymphaeaceae, and Austrobaileyales are strongly supported as a basal grade in the angiosperm phylogeny, with either Amborella or Amborella and Nymphaeales as sister to all other angiosperms. An examination of nucleotide substitution patterns of all nine genes ruled out any possibility of analytical artifacts because of RNA editing and GC-content bias in placing these taxa at the base of the angiosperm phylogeny. Second, Magnoliales are sister to Laurales and Piperales are sister to Canellales. These four orders together constitute the magnoliid clade. Finally, the relationships among Ceratophyllum, Chloranthaceae, monocots, magnoliids, and eudicots are resolved in different ways in various analyses, mostly with low support. Our study indicates caution in total evidence approaches in that some of the genes employed (e.g., mtSSU, mtLSU, and nuclear 26S rDNA) added signal that conflicted with the other genes in resolving certain parts of the phylogenetic tree
KW - inferring complex phylogenies
KW - ribosomal dna-sequences
KW - 3 genomic compartments
KW - group-ii intron
KW - mads-box genes
KW - land plants
KW - flowering plants
KW - chloroplast genome
KW - rdna sequences
KW - molecular-data
U2 - 10.1086/431800
DO - 10.1086/431800
M3 - Article
SN - 1058-5893
VL - 166
SP - 815
EP - 842
JO - International Journal of Plant Sciences
JF - International Journal of Plant Sciences
IS - 5
ER -