Biology – Quantitative Biology – Genomics
Scientific paper
2006-09-04
Biology
Quantitative Biology
Genomics
13 pages, 7 figures
Scientific paper
36 single genes of six plants inferred 18 unique trees using maximum parsimony. Such incongruence is an important issue and how to reconstruct the congruent tree still is one of the most challenges in molecular phylogenetics. For resolving this problem, a genome-wide EST data mining approach was systematically investigated by retrieving a large size of EST data of 144 shared genes of six green plants from GenBank. The results show that the concatenated alignments approach overcame incongruence among single-gene phylogenies and successfully reconstructed the congruent tree of six species with 100% jackknife support across each branch when 144 genes was used. Jackknife supports of correct branches increased with number of genes linearly, but those of wrong branches also increased linearly. For inferring the congruent tree, the minimum 30 genes were required. This approach may provide potential power in resolving conflictions of phylogenies. Keywords: Genome-wide; Data mining; EST; Phylogeny; Congruent tree; Jackknife support; Plants.
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