Is congruence between data partitions a reliable predictor of phylogenetic accuracy? Empirically testing an iterative procedure for choosing among phylogenetic methods

被引:287
作者
Cunningham, CW
机构
关键词
congruence; incongruence tests; maximum likelihood; phylogenetic accuracy; six-parameter parsimony; successive weighting transversion parsimony; weighted parsimony;
D O I
10.2307/2413692
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The relationship between phylogenetic accuracy and congruence between data partitions collected from the same taxa was explored for mitochondrial DNA sequences from two well-supported vertebrate phylogenies. An iterative procedure was adopted whereby accuracy, phylogenetic signal, and congruence were measured before and after modifying a simple reconstruction model, Equally weighted parsimony. These modifications included transversion parsimony successive weighting, and six-parameter parsimony. For the data partitions examined, there is a generally positive relationship between congruence and phylogenetic accuracy. if congruence increased without decreasing resolution or phylogenetic signal this increased congruence was a good predictor of accuracy, If congruence increased as a result of poor resolution, the degree of congruence was not a good predictor of accuracy. For all sets of data partitions, six-parameter parsimony methods show a consistently positive relationship between congruence and accuracy. Unlike successive weighting, six-parameter parsimony methods were not strongly influenced by the starting tree.
引用
收藏
页码:464 / 478
页数:15
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