Influence of Temperature on the Development of Peach Fruit in a Subtropical Climate Region
Influence of Temperature on the Development of Peach Fruit in a Subtropical Climate Region
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DOI：
10.3390/agronomy9010020
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发表时间：
2019-01
期刊：
影响因子：
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通讯作者：
F. B. M. D. Souza;E. Alves;R. Pio;Elisa de Melo Castro;G. Reighard;A. I. Freire;N. Mayer;R. Pimentel
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文献类型：
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作者：
F. B. M. D. Souza;E. Alves;R. Pio;Elisa de Melo Castro;G. Reighard;A. I. Freire;N. Mayer;R. Pimentel
了解桃品种之间的生长过程和果实大小差异对于作物技术领域极为重要，可以为改进适当的作物管理（间伐和收获季节）和大口径果实的作物育种提供信息。然而，这些信息在亚热带地区仍处于起步阶段，需要进一步研究，特别是在巴西。本研究的目的是确定亚热带田间栽培条件下温度对四个桃品种（Tropical、Aurora-2、Ouro Mel-4 和 Biuti）生长的影响。在整个周期中，每两周对来自每个品种的六种不同植物的先前确定的树枝上的 30 个果实进行一次果实发育测定。关于生长度日 (GDD) 的热积累，品种“Tropical”表现出最低的果实农艺特性（大小和质量），并且在果实发育阶段需要较低的 GDD 积累，而品种“Biuti”则表现出更高的热需求和更高的农艺特性。细胞数量对最终果实大小的影响大于细胞面积。
Understanding the growing process and fruit size differences among peach cultivars is extremely important in the technological domain of the crop and can provide information to improve the proper crop management (thinning and harvesting seasons) and the crop breeding of fruits with a larger caliber. However, this information is still incipient in subtropical regions and requires further research, especially in Brazil. The aim of this study was to determine the influence of temperature on the growing of four peach cultivars (Tropical, Aurora-2, Ouro Mel-4, and Biuti) under subtropical conditions of field cultivation. Fruit development was determined every two weeks throughout the cycle with 30 fruits from previously identified branches from six different plants of each cultivar. Regarding the thermal accumulation in growing degree-days (GDD), the cultivar ‘Tropical’ showed the lowest agronomic fruit properties (size and mass) and required a lower GDD accumulation during the development stages of the fruits, whereas the cultivar ‘Biuti’ showed higher thermal requirements and higher agronomic properties. The number of cells had greater influence on the final fruit size than the cell area.