The Phylogeny of Prochloron: Is There Numerical Evidence from SAB Values? A Response to Van Valen
Numerical methods for constructing phylogenies are widely used in molecular biology: often similarity coefficients are derived from (partial) sequence data, and standard clustering algorithms are then applied to produce appropriate dendrograms (Fox et al., 1980; Sneath & Sokal, 1973). Alternative dendrograms based on the same data set may be evaluated by means of numerical criteria. Such criteria do not always seem to be on a sound logical basis: an instance is provided by Van Valen’s methodology of evaluating conflicting estimated phylogenies (Van Valen, 1982); the data in question are S AB values for Prochloron some cyanobacteria and chloroplasts, as reported by Seewaldt & Stackebrandt (1982).
KeywordsBranch Length Tree Topology Numerical Evidence Global Tree Reconstruct Phylogenetic Tree
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