Quantitative evaluation of cucumber fruit texture and shape traits reveals extensive diversity and differentiation
Quantitative evaluation of cucumber fruit texture and shape traits reveals extensive diversity and differentiation
复制标题
DOI：
10.1016/j.scienta.2015.12.033
复制
发表时间：
2016-02-16
影响因子：
4.3
通讯作者：
Yoshioka, Yosuke
中科院分区：
文献类型：
--
作者：
Shimomura, Koichiro;Horie, Hideki;Yoshioka, Yosuke
多年来，育种者一直对黄瓜 (Cucumis sativus L.) 进行基因改良，以满足消费者的需求。世界各地种植了多种黄瓜品种，其果实品质（例如质地和形状）各不相同，并且不同地区已开发出几种主要的黄瓜类型。我们使用了几种计算机辅助评估方法来评估世界各种黄瓜品种的果实质地和形状特征的多样性。通过穿刺试验数据（力-变形曲线）分析，定量、客观地评价果皮、胎盘、果肉的硬度和果肉的脆度。还通过使用椭圆傅里叶描述符（EFD）和主成分分析（PCA）对果实形状进行了定量和客观的评估。不同品种和生长阶段的果实硬度和脆度存在明显差异。日本F-1杂交品种的果肉脆度得分明显较高，即使在成熟时也能保持较高的脆度；相比之下，其他类型品种的脆度在所有阶段都保持较低。 EFD 的 PCA 检测了果实形状变化的三个主要组成部分：长度与直径的比率、果端的膨胀量和茎端的形状。在品种和黄瓜类型之间，这些形状成分存在显着差异。这些结果表明，在驯化和后续育种过程中，黄瓜的果实质地和形状性状发生了数量分化。 (C) 2015 Elsevier B.V. 保留所有权利。
For many years, cucumber (Cucumis sativus L.) has been genetically improved by breeders to meet consumer demands. A wide variety of cucumber cultivars, differing in fruit qualities such as texture and shape, are grown around the world, and several major cucumber types have been developed in different regions. We used several computer-aided evaluation methods to assess the diversity in fruit texture and shape traits among a wide variety of world cucumber cultivars. Firmness of fruit skin, placenta and flesh and crispness of flesh were evaluated quantitatively and objectively by analysis of puncture-test data (force-deformation curves). Fruit shape was also evaluated quantitatively and objectively by using elliptic Fourier descriptors (EFDs) and principal component analysis (PCA). Fruit firmness and crispness clearly differed among cultivars and growth stages. Flesh crispness scores were significantly higher in Japanese F-1 hybrid cultivars, which maintained relatively high crispness even at maturity; in contrast, the crispness of the other type cultivars remained low at all stages. PCA of EFDs detected three major components of fruit shape variation: the ratio of length to diameter, the amount of swelling at the fruit ends and the shape of the stem end. Significant differences were detected in these shape components among cultivars and cucumber types. These results indicate that quantitative differentiation has occurred in the fruit texture and shape traits of cucumber during domestication and subsequent breeding. (C) 2015 Elsevier B.V. All rights reserved.