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Phylogenetics ofFlowering PlantsBased on CombinedAnalysis of PlastidatpB and rbcL GeneSequences Vincent SavolainenMark W. ChaseSara B. Hoot2000 год

Phylogenetics of Flowering Plants Based on Combined Analysis of Plastid atpB and rbcL Gene Sequences
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Аннотация: Following (1) the large-scale molecular phylogeny of seed plants based on plastid rbcL gene sequences (published in 1993 by Chase et al., Ann. Missouri Bot. Gard. 80:528–580) and (2) the 18S nuclear phylogeny of flowering plants (published in 1997 by Soltis et al., Ann. Missouri Bot. Gard. 84:1–49), we present a phylogenetic analysis of flowering plants based on a second plastid gene, atpB, analyzed separately and in combination with rbcL sequences for 357 taxa. Despite some discrepancies, the atpB-based phylogenetic trees were highly congruent with those derived from the analysis of rbcL and 18S rDNA, and the combination of atpB and rbcL DNA sequences (comprising ∼3000 base pairs) produced increased bootstrap support for many major sets of taxa. The angiosperms are divided into two major groups: noneudicots with inaperturate or uniaperturate pollen (monocots plus Laurales, Magnoliales, Piperales, Ceratophyllales, and Amborellaceae–Nymphaeaceae–Illiciaceae) and the eudicots with triaperturate pollen (particularly asterids and rosids). Based on rbcL alone and atpB/rbcL combined, the noneudicots (excluding Ceratophyllum) are monophyletic, whereas in the atpB trees they form a grade. Ceratophyllum is sister to the rest of angiosperms with rbcL alone and in the combined atpB/rbcL analysis, whereas with atpB alone, Amborellaceae, Nymphaeaceae, and Illiciaceae/Schisandraceae form a grade at the base of the angiosperms. The phylogenetic information at each codon position and the different types of substitutions (observed transitions and transversions in the trees vs. pairwise comparisons) were examined; taking into account their respective consistency and retention indices, we demonstrate that third-codon positions and transitions are the most useful characters in these phylogenetic reconstructions. This study further demonstrates that phylogenetic analysis of large matrices is feasible.
Год издания: 2000
Авторы: Vincent Savolainen, Mark W. Chase, Sara B. Hoot, Cynthia M. Morton, Douglas E. Soltis, Clemens Bayer, Michael F. Fay, Anette Y. De Bruijn, Stuart Sullivan, Yin‐Long Qiu
Издательство: Oxford University Press
Источник: Systematic Biology
Ключевые слова: Plant Diversity and Evolution, Plant and Fungal Species Descriptions, Plant and animal studies
Другие ссылки: Systematic Biology (PDF)
Systematic Biology (HTML)
SERVAL (Université de Lausanne) (PDF)
SERVAL (Université de Lausanne) (HTML)
reroDoc Digital Library (HTML)
PubMed (HTML)