Supp_File_8

SUPPLEMENTARY FILE 8. Estimates of theta for various datasets and priors. Each of 6 datasets was subjected to a set of alpha and beta parameters allowing for different current and ancestral population sizes: (1) a gamma (2,2000) prior (with`q = 0.001) for small population sizes, and (2) a gamma (1,10) prior (with`q = 0.1) for large population sizes. Three datasets (called ‘allLoci’; n = 954 SNPs) include all SNPs called across all individuals (see Methods), while the three remaining datasets (n = 947) have constant heterozygotes removed; in each of these two groups of datasets, the first dataset includes all lineages, while the other two datasets have one lineage (‘southern’ Z. viridiflavus or ‘intermediate’ mosaic birds) removed. Each theta stands for one of the nodes in the tree. Note how thetas are heavily influenced by the prior.

补充材料8：不同数据集与先验分布下的θ（theta）估计值。本研究共设置6组数据集，每组均采用一组α与β参数，以适配差异化的现生种群与祖先种群规模：(1) 针对小型种群，采用伽马分布Gamma(2,2000)先验（其中q=0.001）；(2) 针对大型种群，采用伽马分布Gamma(1,10)先验（其中q=0.1）。其中3组数据集命名为"allLoci"，包含所有个体中检出的全部单核苷酸多态性位点（SNPs，n=954）；剩余3组数据集（n=947）则剔除了恒定杂合位点。在上述两组数据集中，第一份数据集均包含所有演化支系，其余两份数据集则移除了其中一支演化支（即"南部"Z. viridiflavus或"中间型"嵌合鸟类）。每个θ（theta）均对应系统发育树中的一个节点。请注意，θ估计值会受到先验分布的显著影响。