NANUQ: A method for inferring species networks from gene trees under the coalescent model [article]

Elizabeth Allman and Hector Banos and John Rhodes
2019 arXiv   pre-print
Species networks generalize the notion of species trees to allow for hybridization or other lateral gene transfer. Under the Network Multispecies Coalescent Model, individual gene trees arising from a network can have any topology, but arise with frequencies dependent on the network structure and numerical parameters. We propose a new algorithm for statistical inference of a level-1 species network under this model, from data consisting of gene tree topologies, and provide the theoretical
more » ... ication for it. The algorithm is based in an analysis of quartets displayed on gene trees, combining several statistical hypothesis tests with combinatorial ideas such as a quartet-based intertaxon distance appropriate to networks, the NeighborNet algorithm for circular split systems, and the Circular Network algorithm for constructing a splits graph.
arXiv:1905.07050v1 fatcat:hsok6oln6fbkvgvn75gzsiy7ji