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arXiv 1302.1440q-bio.PE
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关于生命之树的五个统计问题

Five Statistical Questions about the Tree of Life

Lea Popovic, Maxim Krikun, David Aldous

摘要:

遗传学的随机建模提出了五个问题,这些问题受到了定量生物学家不同程度的关注。1)我们期望(从模型中)最大历史多样性与当前多样性的比值有多大?2)从一个分支的现存物种的正确进化史中,我们可以推断出过去的物种形成和灭绝速率吗?3)现存物种中有多少比例是仍然存在的祖先物种的后代,这与模型的预测相比如何?4)当一个人从物种上的树转移到物种集合上的树(无论是传统的高阶分类群还是PhyloCode中的分支)时,人们是否期望树作为树结构的纯逻辑结果变得更加公正,而不意味着任何真正的生物现象?5)我们如何期望高阶分类群数量的波动率应该与物种数量的波动率相比较?我们提出了一个数学家的观点,基于一个过于简化的建模框架,所有这些问题都可以连贯地研究。

英文摘要:

Stochastic modeling of phylogenies raises five questions that have received varying levels of attention from quantitatively inclined biologists. 1) How large do we expect (from the model) the ration of maximum historical diversity to current diversity to be? 2) From a correct phylogeny of the extant species of a clade, what can we deduce about past speciation and extinction rates? 3) What proportion of extant species are in fact descendants of still-extant ancestral species, and how does this compare with predictions od models? 4) When one moves from trees on species to trees on sets of species (whether traditional higher order taxa or clades from PhyloCode), does one expect trees to become more unbiased as a purely logical consequence of tree structure, without signifying any real biological phenomenon? 5) How do we expect that fluctuation rates for counts of higher order taxa should compare with fluctuation rates for number of species? WE present a mathematician's view based on an oversimplified modeling framework in which all these questions can be studied coherently.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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