|||
#编者信息
熊荣川
明湖实验室
xiongrongchuan@126.com
http://blog.sciencenet.cn/u/Bearjazz
Polytomy is a term for an internal node of a cladogram that has more than two immediate descendents (i.e, sister taxa). In contrast, any node that has only two immediate descendents is said to be resolved. Overall, we refer to a cladogram in which all internal nodes are resolved as fully resolved (below left), whereas a cladogram that has a mixture of resolved nodes and polytomies as partially resolved (below center). A cladogram that is completely unresolved is termed a star tree (below right).
| 多岐分支是指有两个以上直系后代(即姐妹分类群)的内部节点。相反,任何只有两个直接子代的节点都被认为是(系统发育关系)得到解决了的(解析)。通常,我们提到一个系统发育树,其中所有内部节点都被解析了,则被称为为完全解析(左下),而混合了解析节点和多岐节点的被称为部分解析(中下)。完全未解决的系统发育树被称为星形树(右下)。 |
Introduction to Phylogeny: Hard or Soft Polytomies? http://biology.fullerton.edu/biol404/phylo/polytomies.html |
Archiver|手机版|科学网 ( 京ICP备07017567号-12 )
GMT+8, 2024-9-20 13:30
Powered by ScienceNet.cn
Copyright © 2007- 中国科学报社