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

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 tem-peratures. 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.

Bibliographic Details

Main Author:	Chaar, Javier Emilio
Format:	Digital revista
Language:	spa eng
Published:	Universidad Nacional de Colombia - Sede Palmira 2015
Online Access:	https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/47565
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