Polyploid breeding in flowering plants

Pathways, Mechanisms, and Rates of Polyploid Formation in Flowering Plants

Polyploidy is widely acknowledged as a major mechanism of adaptation and speciation in plants. The stages in polyploid evolution include frequent fertility bottlenecks and infrequent events such as gametic nonreduction and interspecific hybridization, yet little is known about how these and other factors influence overall rates of polyploid formation. Here we review the literature regarding pol...

Polyploid formation shapes flowering plant diversity.

Polyploidy, or whole genome duplication, has been an important feature of eukaryotic evolution. This is especially true in flowering plants, where all extant angiosperms have descended from polyploid species. Here we present a broad comparative analysis of the effect of polyploidy on flowering plant diversity. We examine the widely held hypothesis that polyploid flowering plants generate more d...

Neopolyploidy in Flowering Plants

Justin Ramsey1,2 and Douglas W. Schemske3 1Department of Botany, Box 355325, University of Washington, Seattle, Washington 98195-5325; email: [email protected] 2Present address: Department of Botany, University of Guelph, Guelph, Ontario N1G 2W1, Canada; email: [email protected] 3Department of Plant Biology and Kellogg Biological Station, Michigan State University, East Lansing, Michig...

Bioinformatic aspects of breeding polyploid crops

Novel flowering time variation in the resynthesized polyploid Brassica napus.

Recent molecular data using resynthesized polyploids of Brassica napus established that genome changes can occur rapidly after polyploid formation. In this study we present data that de novo phenotypic variation for flowering time also occurs rapidly after polyploidization. Two initial polyploid plants were developed by reciprocal crosses of B. rapa and B. oleracea followed by chromosome doubli...