Accessory Buds in the Genus Rubus with Particular Reference to R. idaeus L.

Accessory (secondary) axillary buds occurred in 21 out of 32 Rubus species, including wild raspberry, R. idaeus L. The adaptive value of the secondary-bud character is discussed. Disbudding experiments on three raspberry cultivars and their inbred derivatives revealed considerable variability in proportion of secondary laterals developing and in numbers of flowers per secondary lateral, suggesting the possibility of selection for high secondary crop potential.