Fruit size prediction of four apple cultivars: Accuracy and timing

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• 作者：P. Zadravec ; R. Veberic ; F. Stampar ; K. Eler ; V. Schmitzer
• 关键词：Apple ; Cultivar ; Fruit ; Diameter ; Mass ; Increase
• 刊名：Scientia Horticulturae
• 出版年：2013
• 出版时间：27 August, 2013
• 年：2013
• 卷：160
• 期：Complete
• 页码：177-181
• 全文大小：384 K

文摘

Apple fruit diameter and final fruit mass were monitored from T-stage until harvest over three consecutive years to assess the accuracy of fruit diameter prediction at several timestamps during apple fruit development. Four apple cultivars were selected for the study: ¡®Golden Delicious Reinders¡¯, ¡®Gala Brookfield¡¯, ¡®Fuji Kiku 8¡¯ and ¡®Braeburn Hillwell¡¯. Moreover, fruits were selected according to the characteristics of the fruiting wood: (1) terminal bud on one-year-old wood (30-40 cm), (2) terminal bud on two-year-old wood, and (3) terminal bud on three-year-old wood. The prime influence on the final fruit size has been determined for cultivar, with great differences also detected among the analyzed years. Final fruit diameter and fruit mass were positively correlated in all analyzed cultivars. Position of the fruiting wood had a minor impact on final apple fruit size and the growth analysis of apple fruit revealed a uniform growth rate regardless of the position. Important cultivar-specific accuracy of yield prediction has been established with statistically significant correlations at an early stage of apple fruit growth but variable accuracy between early- and late-ripening cultivars.