The influence of sampling from different canopy positions on the evaluation of flower bud anomalies and dormancy in apricot (Prunus armeniaca L.)

摘要: Introduction. For some species such as P. armeniaca , overcoming dormancy may be problematic when cold requirements are not satisfied. Moreover, the different positions of flower buds on tree canopy and apical basal portions twigs can influence their development. Sampling problems have been extensively studied. Therefore, effect sectors (west east), heights (top bottom) twig (medium-apical medium-basal) break in apricot was evaluated. Attention also focused floral anomalies relation to bud position twig, order identify least variable portion thus provide useful information for optimization periodic sampling. Materials methods. Two cultivars with chilling were chosen: `San Castrese' `Orange Red'. The end endo-dormancy evaluated from December blooming time by traditional biological approaches, increase fresh weight evolution phenological stage, before after 7 d under forcing conditions. In addition, percentage considered twig. Results conclusion. results showed that exerted effects breaking endo-dormancy, practical applications drawn them best sampling design inside structure: west orientation medium-apical obtain an earlier active growth buds, allowing prediction breaking. analysis considerable differences depending High percentages anomalous observed medium-basal which could distort evaluation dormancy, due a weaker trend buds.