Hybrids in real time (2005)
AuthorsBaroni, Mihaela, Semple, Charles, Steel, Mikeshow all
We describe some new and recent results that allow for the analysis and representation of reticulate evolution by non-tree networks. In particular we (1) present a simple result to show how there is always a well-defined 'tree of life' even in the presence of reticulation, (2) describe and apply new theory for determining the smallest number of hybridization events required to explain conflicting gene trees, and (3) present a new algorithm to determine whether an arbitrary rooted network can be realised by contemporaneous reticulation events. We illustrate these results with examples.