ABSTRACT: In Santa Fe, the central-east area of Argentina, the expansion of fruit tree crops requires the introduction and evaluation of low chilling varieties. The aims of this study was to characterize the phenological behaviour and the reproductive traits of peach (Prunus persica L. Batsch) and nectarine varieties with chilling requirements ranging from 150 to 650 chilling hours (CH). Low chilling varieties (≤ 450 CH) had higher flower density (22.0-56.5 flowers m -1 ), fruit set (26.0-56.7%), fruit yield …
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