CASES IN WHICH PARSIMONY OR COMPATIBILITY METHODS WILL BE POSITIVELY MISLEADING
CASES IN WHICH PARSIMONY OR COMPATIBILITY METHODS WILL BE POSITIVELY MISLEADING
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DOI：
10.2307/2412923
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发表时间：
1978-01-01
期刊：
影响因子：
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通讯作者：
FELSENSTEIN, J
中科院分区：
文献类型：
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作者：
FELSENSTEIN, J
对于一些简单的 3 和 4 种。在涉及具有两种状态的字符的情况下，随着越来越多的数据积累，确定了在什么条件下几种系统发育推断方法无法收敛到真正的系统发育。这些方法是Camin-Sokal简约法、相容法和Farris的无根瓦格纳树简约法。在所有情况下，这种失败的条件（即统计上不一致的失败）本质上是并行更改超过了信息丰富的非并行更改。即使变化不太可能是先验的，只要不同谱系的进化速率足够不平等，这些方法也可能不一致。这种方法的扩展可以为评估系统发育推断方法提供合理的方法。
For some simple 3 and 4 spp. cases involving a character with 2 states, it was determined under what conditions several methods of phylogenetic inference would fail to converge to the true phylogeny as more and more data were accumulated. The methods were the Camin-Sokal parsimony method, the compatibility method and Farris''s unrooted Wagner tree parsimony method. In all cases the conditions for this failure (which is the failure to be statistically consistent) were essentially that parallel changes exceed informative, nonparallel changes. It is possible for these methods to be inconsistent even when change is improbably a priori, provided that evolutionary rates in different lineages are sufficiently unequal. Extension of this approach may provide a sound methodology for evaluating methods of phylogenetic inference.