Brazil is the world's largest producer of common beans (Phaseolus vulgaris L.). Drought stress harms the morphological and agronomic traits of beans. This study evaluates the reaction to water deficit in five genotypes of black beans. The experiment was conducted in the IDR-IAPAR-EMATER in Londrina-PR, Brazil. A split-plot design was used, with three replications. The genotypes were included in the subplots and the treatments with or without water deficit in the plots. Water deficit was induced on the pre-flowering stage and maintained for 20 days in the plots submitted to drought stress. For the growth analysis, plants were collected at 35, 54 and 70 days after emergence. At the stage of physiological ripeness, several morphological and yield traits were evaluated. The genotypes IPR Uirapuru and BRS Esplendor can be considered tolerant and used as a tolerant source to water deficit in common bean germplasm banks. The line LP 08-90 has morphological and agronomic adaptations efficient to overcome water deficit's effects, presenting a higher grain yield in both crop conditions, which indicates the success of black beans breeding to deal with water deficit.

中文翻译：

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缺水对具有对比耐旱性的黑菜豆基因型（Phaseolus vulgaris L.）形态农艺性状的影响

巴西是世界上最大的普通豆类（Phaseolus vulgarisL.）。干旱胁迫会损害豆类的形态和农艺性状。本研究评估了五种黑豆基因型对缺水的反应。该实验在巴西隆德里纳公关的 IDR-IAPAR-EMATER 中进行。使用裂区设计，重复三次。基因型包括在子图中，并且在图中有或没有缺水的处理。在开花前阶段诱导水分亏缺，并在遭受干旱胁迫的地块中维持 20 天。对于生长分析，在出苗后 35、54 和 70 天收集植物。在生理成熟阶段，对几种形态和产量性状进行了评价。IPR Uirapuru 和 BRS Esplendor 基因型可以被认为是耐受的，并用作普通豆类种质资源库中水分亏缺的耐受来源。