The peach tree culture, in the last years, has been showing to be a viable technically and an attractive economic activity in the region of Jaboticabal, state of São Paulo, Brazil. For this region to become a new peaches' production pole, new studies are necessary using new peach cultivars and adapted genotypes with double purpose, enlarging the options and harvest period. The present research had for objective to study the fenology and bud production in 'Aurora-1' and 'Régis' peach cultivars and 'Jab 484' and 'Jab 694' peach selections in the region of Jaboticabal. In two years of evaluations (2005 and 2006), it was conclude that: a) 'Régis' cultivar presents larger bud flowers production for mixed branch, larger vegetative/flowers buds relation and smaller cycle (between 72 and 74 days) among the genotypes studied, being the only one classified as ultra precocious; b) the selections 'Jab 484' and 'Jab 694' present medium cycle and identical fenological behavior, having a harvest period between December 8th to 28th ; c) 'Aurora-1' cultivar, when cultivated in the region of Jaboticabal, presents flower/vegetative bud relation near to 1, cycle between 82 and 85 days and can be classified as very precocious.
Prunus persica (L.) Batsch; stone fruits; flower buds; vegetative buds; cycle
