doi: 10.1007/pl00006427.
Problems with parsimony in sequences of biased base composition
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- PMID: 9847410
- DOI: 10.1007/pl00006427
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Problems with parsimony in sequences of biased base composition
J Mol Evol.
1998 Dec.
Abstract
Parsimony is commonly used to infer the direction of substitution and mutation. However, it is known that parsimony is biased when the base composition of the DNA sequence is skewed. Here I quantify this effect for several simple cases. The analysis demonstrates that parsimony can be misleading even when levels of sequence divergence are as low as 10%; parsimony incorrectly infers an excess of common to rare changes. Caution must therefore be excercised in the use of parsimony.
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