Identifying Hidden Rate Changes in the Evolution of a Binary Morphological Character: The Evolution of Plant Habit in Campanulid Angiosperms
Identifying Hidden Rate Changes in the Evolution of a Binary Morphological Character: The Evolution of Plant Habit in Campanulid Angiosperms
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DOI：
10.1093/sysbio/syt034
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发表时间：
2013-09-01
影响因子：
6.5
通讯作者：
Donoghue, Michael J.
中科院分区：
文献类型：
--
作者：
Beaulieu, Jeremy M.;O'Meara, Brian C.;Donoghue, Michael J.
从理解各种各样的进化模式和过程的角度来看，系统发育树在范围和大小上的增长是有希望的。与树组成的更大，更老，和全球分布的分支，很可能是一个二进制字符的不稳定性将显着不同的血统，这可能会导致错误的估计过渡率和相关的推断祖先的国家。在这里，我们开发和实现了一个新的方法来确定不同的进化率在一个二元字符沿着不同分支的一个同源性。我们通过探索风铃草科（Campanulidae）生长习惯的进化来说明这种方法，风铃草科是一个包含约35，000个物种的开花植物分支。木本与草本物种的分布对传统的二元性状进化模型提出了质疑。在不同的谱系中的生长形式进化的速度的变化的识别和住宿证明，第一次，在一个非常大的，非常古老的，非常广泛的开花植物分支的生长形式进化的强大的图片。
The growth of phylogenetic trees in scope and in size is promising from the standpoint of understanding a wide variety of evolutionary patterns and processes. With trees comprised of larger, older, and globally distributed clades, it is likely that the lability of a binary character will differ significantly among lineages, which could lead to errors in estimating transition rates and the associated inference of ancestral states. Here we develop and implement a new method for identifying different rates of evolution in a binary character along different branches of a phylogeny. We illustrate this approach by exploring the evolution of growth habit in Campanulidae, a flowering plant clade containing some 35,000 species. The distribution of woody versus herbaceous species calls into question the use of traditional models of binary character evolution. The recognition and accommodation of changes in the rate of growth form evolution in different lineages demonstrates, for the first time, a robust picture of growth form evolution across a very large, very old, and very widespread flowering plant clade.