TREE BALANCE
TREE BALANCE
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DOI：
10.2307/2992186
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发表时间：
1990-09-01
期刊：
影响因子：
--
通讯作者：
SOKAL, RR
中科院分区：
文献类型：
--
作者：
SHAO, KT;SOKAL, RR
等级分类在树的平衡方面可能有所不同——树的平衡是指分支将从属的分类群划分为大小相等的子集的程度。比较了对树木平衡不同方面敏感的几个指标。提出了将这些指标扩展到多分叉树和具有不同otu数的树，并提出了使用这些指标的建议。无论计算哪个索引，不同的树形成算法都可能导致树具有不同程度的平衡。树平衡是系统发育系统学的一个重要考虑因素，因为系统发育的真实平衡将影响其估计的准确性。
Hierarchic classifications can differ with respect to tree balance-the degree to which branches divide the subtended taxa into subsets of equal size. Several indices, sensitive to different aspects of tree balance, are compared. Extensions of these indices to multifurcating trees and to trees with varying numbers of OTUs are proposed, and suggestions for empolying these indices are furnished. Different-tree-forming algorithms may result in trees with differing degrees of balance no matter which index is computed. Tree balance is an important consideration for phylogenetic systematics, because balance of the true phylogeny will affect the accuracy of its estimates.