Abstract

A study of yield components of the raspberry revealed a considerable range of variation, indicating that there is considerable scope for selecting for increasing yields. Interaction between the components often prevents the maximum expression of all of them in one cultivar. However, the evidence suggested two methods of improving yields (1) by selecting for greater general vigour and (2) by selecting for plants which utilise a greater proportion of their resources for fruit production. Some implications for breeding and for plantation management are discussed.