Breeding Potential of Lower Ploidy FragariaSpecies (Hedrick Student Award Review Paper 2003)

Abstract

The recent discovery of the narrow genetic base of the cultivated strawberry has sparked a renewed interest in the use of wild Fragariaspecies in breeding programs. The two progenitor octoploid species, F. chiloensisand F. virginianaare the only species that have been predominantly used in strawberry breeding. There are however, several lower ploidy Fragariaspecies (2x, 4x, and 6x) with desirable characteristics such as unique flavors, vigor, disease and pest resistance, and adaptability to a wide range of habitats that also have potential for use in breeding programs. The development of the synthetic octoploid system has created the opportunity to efficiently incorporate lower ploidy wild species germplasm into the cultivated strawberry. A better understanding of the characteristics of the lower ploidy wild species may assist in the effective use of this valuable germplasm.