化石
Online ISSN : 2424-2632
Print ISSN : 0022-9202
ISSN-L : 0022-9202
特集:魚類化石研究の現状と可能性(2)
分子系統樹を用いた分岐年代推定と生物多様化プロセス解析の概要
昆 健志井上 潤
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2019 年 106 巻 p. 5-17

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Understanding the process by which life diversifies is one of the central issues in biology. To clarify this process in focal taxa as well as to conduct phylogenetic analyses, a divergence time estimation —an important analysis to determine the timescale of a phylogenetic tree— must be performed. It is thought that the diversification process can be vividly reconstructed by estimating the diversification rate and ancestral geographic area, characterizing ancestral ecology, and mapping ancestral habitats according to a time-calibrated phylogenetic framework. Here we introduce a divergence time estimation method and various other methods for reconstructing the process of diversification based on the time-calibrated phylogenetic framework with some study examples of aquatic organisms, mainly fish.

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