RUIZ, David; EGEA, José; SALAZAR, Juan Alfonso; CAMPOY, José Antonio

doi:10.1016/j.scienta.2018.07.014

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RUIZ, David
Department of Plant Breeding

EGEA, José
Department of Plant Breeding

SALAZAR, Juan Alfonso
Department of Plant Breeding

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Article de revue

Ce document a été publié dans

Scientia Horticulturae. 2018, vol. 242, p. 164-169

Elsevier

Résumé en anglais

The chilling requirements for dormancy release and heat requirements for flowering were studied for three successive years in eleven Prunus salicina L. cultivars that spanned the range of flowering times in this species. Different methods for estimating chilling requirements were evaluated and compared, and correlations between chilling requirements, heat requirements and flowering date were established. The cultivars examined showed a range of chilling requirements (chill units, CU), spanning from 334.3 CU (‘Pioneer’) to 987.5 CU (‘Songold’). The heat requirements for flowering ranged between 5990 and 9228 growing degree hours. The chilling requirements were significantly different among cultivars, whereas no cultivar effect was found for the heat requirement values. In addition, chill portions were the variable that correlated the most with flowering date in Japanese plum. The dissection of flowering date into chilling and heat requirements indicates that chilling requirements is the main variable driving the variation of flowering time within Japanese plum cultivars.< Réduire

Mots clés

Environment

Prunus salicina

Mots clés en anglais

Dormancy

Adaptation

Chilling requirements

Heat requirements

Flowering