title: Gene flow despite complex Robertsonian fusions among rock-wallaby (Petrogale) species.
abstract: Complex Robertsonian rearrangements, with shared arms in different fusions, are expected to prevent gene flow between hybrids through missegregation during meiosis. Here, we estimate gene flow between recently diverged and chromosomally diverse rock-wallabies (Petrogale) to test for this form of chromosomal speciation. Contrary to expectations, we observe relatively high admixture among species with complex fusions. Our results reinforce the need to consider alternative roles of chromosome change, together with genic divergence, in driving speciation.
authors.affiliation: Research School of Biology and Centre for Biodiversity Analysis, The Australian National University, Acton, Australian Capital Territory 2601, Australia Australian Museum Research Institute, Sydney, New South Wales 2010, Australia sally.potter@anu.edu.au.
authors.forename: Sally
authors.initials: S
authors.lastname: Potter
authors.affiliation: Research School of Biology and Centre for Biodiversity Analysis, The Australian National University, Acton, Australian Capital Territory 2601, Australia.
authors.forename: Craig
authors.initials: C
authors.lastname: Moritz
authors.affiliation: Australian Museum Research Institute, Sydney, New South Wales 2010, Australia.
authors.forename: Mark D B
authors.initials: MD
authors.lastname: Eldridge
mesh_terms: D000818:Animals; D001315:Australia; D033481:Chromosomes, Mammalian / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000235:genetics; D051456:Gene Flow; D049810:Genetic Speciation; D006824:Hybridization, Genetic; D007614:Macropodidae / Q000235:genetics*; D018895:Microsatellite Repeats; D014178:Translocation, Genetic
chemical_list: D004272:DNA, Mitochondrial
keywords: chromosome; gene flow; monobrachial homology; speciation