FLOWER DIFFERENTIATION AND PLANT ARCHITECTURE OF RASPBERRY, BLACKBERRY AND WHITE- AND REDCURRANT
The research was aimed to describe the shoot growth, flower differentiation and flower bud positioning (architecture) of raspberry (primocane fruiting - Erika, Dolomia, Lagorai, L03 and floricane fruiting - Tulameen, Violet), blackberry (floricane fruiting - Chester, Loch Ness, Tupì) and currant (white, Viktoria, and red, Junifer, Rovada) during the growing season. One-year-old plants were planted and grown in Vigolo Vattaro (TN - northern Italy), 725 m a.s.l.; 46°00N; 11°120E. In the primocane fruiting raspberry cultivars, the flowers differentiated quickly in July while in the floricane fruiting cultivars the buds became reproductive in October. Notably, Lagorai had an intermediate behaviour with a few buds differentiating in July and a high number in October. Blackberry cultivars Chester and Tupì showed a typical floricane behaviour, whereas Loch Ness exhibited an intermediate differentiation type similar to the raspberry Lagorai. In currant, the flower differentiation started slowly, between June and July, reaching a maximum in September in cultivars Viktoria and Rovada, while it began one month later in Junifer. The most interesting difference was related to the type of fruiting shoots: brachyblast, short or medium shoots showed high flower differentiation while long shoots differentiated flower buds in a very different way according to the cultivar.
Neri, D., Massetani , F., Zucchi, P., Giacomelli , M. and Savini, G. (2012). FLOWER DIFFERENTIATION AND PLANT ARCHITECTURE OF RASPBERRY, BLACKBERRY AND WHITE- AND REDCURRANT. Acta Hortic. 926, 243-250
Rubus spp., Ribes rubrum, bud development, architectural model, growth cycle