A gene for yellow fruit, designated Y, segregated in progenies obtained by crossing R. phoenicolasius with the red raspberry and backcrossing to the raspberry. Another gene, designated Ys, suppressed its expression in R. phoenicolasius itself and in the F1. Gene Y was dominant to alleles for red fruit in the red raspberry; it was epistatic to gene T and its expression was not influenced by genes which intensify the expression of this gene. It had no visible effect on the anthocyanin content of vegetative parts and its effect on the fruit was due to reduction in the content of all the anthocyanins and not to supression of any particular one.