Characterization of peach (Prunus persica (L.) Batsch.) cultivars by frost resistance

Acta Agronómica

Chaar, Javier Emilio¹ 

[1] Instituto Nacional de Tecnología Agropecuaria, Junín, Argentina

关键词: Acclimation;    freezing;    bloom density;    phenology;    LT50;    Prunus persica;   

DOI  :  10.15446/acag.v64n3.47565

学科分类：农业科学（综合）

来源: Universidad Nacional de Colombia * Facultad de Ciencias Agropecuarias Palmira

【 摘 要 】

Spring frosts are one of main crop constraints of temperate fruit trees. Within a species exists variability in damage caused by subzero temperatures on flower organs during breaking winter rest. In five peach [Prunus persica (L.) Batsch.] and one nectarine cultivars, field frost damage was assessed, also recording full bloom date and bloom density. Additionally, mean lethal temperature (LT50) of flower buds in the open flower state was determined through laboratory controlled thermal declines. Peach cultivars Maria Bianca and Summer Pearl had higher density of healthy flowers per cm of shoot, after field subzero temperatures. Field frost resistance was related mainly with high bloom density, combined, in some cases, with late bloom. Late bloom did not result a resistance feature itself. Therefore, to select peach cultivars with less damage risk by subzero temperatures, it is important to consider more than one variable related with reproductive organs.

【 授权许可】

Unknown