Phylogenetic origins of dioecy in Silene
2005 (English)In: Abstracts IBC XVII, 2005Conference paper (Other scientific)
The aim of this project is to provide a phylogenetic/taxonomic framework for the evolution of dioecy within Silene (Caryophyllaceae). There are several dioecious taxa within the genus, traditionally classified in the sections Elisanthe and Otites. To understand how dioecy has evolved, these dioecious taxa need to be compared with their closest relatives. Available data suggest that the dioecious taxa within Elisanthe do not form a monophyletic group with the hermaphrodites in the section. Instead they seem more related to section Conoimorpha. This study is based on data from several Silene genes: (i) a gene sex-linked in the dioecious Elisanthe species (SlXY1) and a homologous autosomal gene in hermaphroditic taxa, (ii) intron sequences from the genes encoding the second largest subunits in the RNA polymerase gene family (RPA2, RPB2, RPD2) and (iii) chloroplast DNA. Remarkably, preliminary data suggest recombination between phylogenetically distant SIXY1 lineages.
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IdentifiersURN: urn:nbn:se:uu:diva-77215OAI: oai:DiVA.org:uu-77215DiVA: diva2:105127