Kelly, Laura , Leitch, Andrew R. , Clarkson, James J. , Chase, Mark W. .
Homoploid hybridization and recombination in Nicotiana (Solanaceae).
When hybridization is involved, recombination between gene copies/alleles of low-copy nuclear genes presents great challenges for the reconstruction of relationships among species. We use data from six low-copy nuclear genes to evaluate long-standing hypotheses of homoploid (interspecific) hybrid speciation in Nicotiana (Solanaceae) and reconstruct a complex series of reticulation events that have been important in the evolutionary history of this genus. Hybrid origins for three diploid species are inferred using a variety of methods. Our results show that intragenic recombination is relatively common, so it is important to explore the possibility of recombination when hybridization may be involved in the evolutionary history of a group.
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1 - Royal Botanic Gardens Kew, Jodrell Laboratory, Richmond, Surrey, TW9 3AB, UK
2 - Queen Mary University of London, School of Biological Sciences, London, E1 4NS, United Kingdom
3 - Royal Botanic Gardens, Kew, Jodrell Laboratory, Richmond, Surrey, TW9 3AB, United Kingdom
low copy nuclear markers.
Presentation Type: Oral Paper:Papers for Sections
Location: 556B/Convention Center
Date: Tuesday, August 3rd, 2010
Time: 2:00 PM