Examples

Figure 2 presents a reconstruction of the   gene tree relating 13 species of Darwin’s fnches from a 2,065-bp partial   nucleotide alignment of the mitochondrial control region and cytochrome b   genes (Sato et al. 1999) and fve continuously measured phenotypic traits of   the corresponding species (Sulloway 1982). In performing this simultaneous   inference, we exploit the RLC model (Drummond and Suchard 2010) and find   evidence for one suggestive rate change (Bayes factor in favor of the RLC   over a strict clock = 2.3) in the lineage leading to the Cocos Island Finch,   Pinaroloxias inornata. Multivariate Brownian trait diffusion shows strong   correlation between wing and tarsus length and between bill depth and gonys   length. Posterior trait prediction at any point along the history is possible   and, currently unique to BEAST, comparative method inference is performed   jointly with phylogenetic inference.

举例说明

图2展示了13个达尔文雀的基因树情况，该树是基于2065 bp线粒体控制区和细胞色素b基因（Sato et al. 1999）比对序列以及相关物种5个表型量化特征构建的（Sulloway 1982）。在进行这一同步推断的过程中，我们采用了RLC模型（Drummond and Suchard 2010）且在科科斯岛雀（Pinaroloxias Inornata）的谱系中找到一个提示性速率变化的证据（strict clock = 2.3时，Bayes因子对RLC最优）。多变异的布朗性状扩散显示翼长与跗骨长度之间以及嘴高与下喙长度之间的存在强相关性。对于BEAST来说，进化树上任何一点的后验特性预测都是可能且唯一，（特征）比较推理与系统发育推理相可以结合起来。