Incomplete Lineage Sorting and Hybridization Statistics for Large-Scale Retroposon Insertion Data
Fig 2
Schematic representation of various species trees.
In all trees, lineage A is the red branch, lineage B is the green branch, and lineage C is the blue branch. (a) C-tree. First split: the ancestral population at time point t0 segregates into two branches, later one of them forms lineage C. At time point t1 the other branch diverges into the two lineages A and B. (b) A-tree. First split: the ancestral population at time point t0 segregates into two branches, later one of them forms lineage A. At time point t1 the other branch diverges into the two lineages B and C. (c) B-tree. First split: the ancestral population at time point t0 segregates into two branches, later one of them forms lineage B. At time point t1 the other branch diverges into the two lineages A and C. (d) ABC-tree. At the time point t0 the ancestral population segregates into three branches, later forming the three lineages A, B, and C (trifurcation). (e) Schematic representation of ancestral hybridization. B-fusion. First split: the ancestral population segregates at time point t0 into two branches. Subsequently, one of the branches (blue) splits after t1 generations, and the other branch (red) splits after t2 generations. The remaining parts of the blue and red lineages form lineages C and A, respectively. The derivates from the two joining populations form lineage B. The proportions of the parental populations forming lineage B are indicated by the coefficients γ1 and γ2, respectively.