BRANCH SUPPORT AND TREE STABILITY
BRANCH SUPPORT AND TREE STABILITY
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DOI：
10.1006/clad.1994.1019
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发表时间：
1994-09-01
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通讯作者：
BREMER, K
中科院分区：
文献类型：
--
作者：
BREMER, K
在几乎最节俭的树的共识中，树枝支撑度被量化为失去一根树枝所需的额外长度。这种方法完全基于原始数据，而不是引导过程中使用的数据扰动。如果树是由Farris的逐次逼近法生成的字符加权方法，则应该根据丢失分支所需的加权额外长度来检查分支支持。树上所有分支支持值的总和除以最简约树的长度[S]提供了一个新的指标，即总支持度指数。这一指数是根据所支持的分辨率来衡量树的稳定性，这在支序分析中是最重要的。
Branch support is quantified as the extra length needed to lose a branch in the consensus of near-most-parsimonious trees. This approach is based solely on the original data, as opposed to the data perturbation used in the bootstrap procedure. If trees have been generated by Farris's successive approximations approach to character weighting, branch support should be examined in terms of weighted extra length needed to lose a branch. The sum of all branch support values over the tree divided by the length of the most parsimonious tree[s] provides a new index, the total support index. This index is a measure of tree stability in terms of supported resolution, which is of prime importance in cladistic analysis.