Abstract

Seedlings with ‘miniature’ fruits or with ‘blind’ fruiting laterals were found to segregate when the raspberry varieties Norfolk Giant and Baumforth’s Seedling B, were inbred. It was concluded that in each family both abnormalities were caused by the same recessive gene (1₂), which had pleiotropic effects on each stage of growth. Its action was to decrease growth by amounts which increased progressively with each stage of the plant’s development. The effects of the gene are compared and contrasted with those of gene L₁.