PROGRESS IN RUBUS BREEDING AT EAST MALLING
Current aims in red raspberry breeding at East Malling include: suitability for mechanical harvesting; higher yields through fruit size (for hand picking for dessert) or fruit number (for mechanical harvesting); extending the season by breeding extra early and extra late summer-fruiting types and earlier autumn-fruiting selections; shorter self-supporting selections; improved shelf life; resistance to cane diseases, virus and mildew, to the virus vector Amphorophorarubi and to Byturus tomentosus. Wild species donors include: R. occidentalis for fruit qualities and A. rubi resistance; R. cockburnianus for fruit number and ease of abscission of fruit; R. crataegifolius for ease of abscission, stout, self-supporting canes and Byturus resistance; R. spectabilis for earliness; R. arcticus and R. odoratus for autumn-fruiting; and R. coreanus for disease and Byturus resistance.
A small-scale programme is aimed at breeding spineless, Verticillium dahlia e-resistant black raspberries.
Since 1955, 15 major genes concerned with pest and disease resistance, and 13 controlling vegetative characters in Rubus have been identified.
Keep, E. (1976). PROGRESS IN RUBUS BREEDING AT EAST MALLING. Acta Hortic. 60, 123-128