| Abstract Detail
Hybrids and Hybridization Eriksson, Torsten [1], Lundberg, Magnus [2], Smedmark, Jenny E. E. [1], Zhang, Q [3], Davis, Thomas M. [3]. Reconstructing reticulate evolution of polyploid strawberries (Fragaria, Rosaceae), using nuclear low copy DNA sequence data. We present a detailed hypothesis for the polyploid evolution of the strawberry genus (24 known species). Our scenario, based on phylogenetic analyses of the low/single copy intergenic region between the two genes Resistance Gene Analogue 1 (RGA1) and Subtilase (SUBT), interprets polyploid parentage as well as the processes (autopolyploidy or allopolyploidy) involved, and their order in time. Three tetraploid Fragaria species have an autopolyploid origin. The hexaploid Fragaria moschata originated after two events of allopolyploidization. The octoploid lineage, including the two North American species Fragaria virginiana and Fragaria chiloensis, was formed by an allopolyploidization event between the Fragaria moschata lineage and a diploid lineage. The recently described decaploid species Fragaria cascadensis originated after an allopolyploidization event between the octoploid lineage and another diploid lineage. The decaploid Fragaria iturupensis was formed through allopolyploidization between the octoploid lineage and a diploid lineage. The progenitors of the hexa-, octo-, and decaploid Fragaria species are from the diploid lineages of Fragaria vesca, Fragaria viridis, Fragaria iinumae, and Fragaria daltoniana.
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1 - University of Bergen, University Museum, P.O. Box 7800, Bergen, 5020, Norway
2 - Stockholm University, Department of Botany, Stockholm, 10691, Sweden
3 - University of New Hampshire, Department of Biological Sciences, Rudman Hall, Durham, NH, 03824, USA
Keywords:
Strawberries
polyploidy
hybridization
systematics and phylogeny.
Presentation Type: Oral Paper
Session: 50, Hybrids and Hybridization
Location: 102/Savannah International Trade and Convention Center
Date: Wednesday, August 3rd, 2016
Time: 5:30 PM
Number: 50008
Abstract ID:939
Candidate for Awards:None |
