Choukri Hasnae, Hejjaoui Kamal, El-Baouchi Adil, El Haddad Noureddine, Smouni Abdelaziz, Maalouf Fouad, Thavarajah Dil, Kumar Shiv
Laboratoire de Biotechnologie et de Physiologie Végétales, Faculté des Sciences, Centre de Recherche BioBio, University Mohammed V in Rabat, Rabat, Morocco.
International Center for Agricultural Research in the Dry Areas (ICARDA), Rabat, Morocco.
Front Nutr. 2020 Nov 23;7:596307. doi: 10.3389/fnut.2020.596307. eCollection 2020.
Lentil ( Medikus) is a protein-rich cool-season food legume with an excellent source of protein, prebiotic carbohydrates, minerals, and vitamins. With climate change, heat, and drought stresses have become more frequent and intense in lentil growing areas with a strong influence on phenology, grain yield, and nutritional quality. This study aimed to assess the impact of heat and drought stresses on phenology, grain yield, and nutritional quality of lentil. For this purpose, 100 lentil genotypes from the global collection were evaluated under normal, heat, and combined heat-drought conditions. Analysis of variance revealed significant differences ( < 0.001) among lentil genotypes for phenological traits, yield components, and grain quality traits. Under no stress conditions, mineral concentrations among lentil genotypes varied from 48 to 109 mg kg for iron (Fe) and from 31 to 65 mg kg for zinc (Zn), while crude protein content ranged from 22.5 to 32.0%. Iron, zinc, and crude protein content were significantly reduced under stress conditions, and the effect of combined heat-drought stress was more severe than heat stress alone. A significant positive correlation was observed between iron and zinc concentrations under both no stress and stress conditions. Based on grain yield, crude protein, and iron and zinc concentrations, lentil genotypes were grouped into three clusters following the hierarchical cluster analysis. Promising lentil genotypes with high micronutrient contents, crude protein, and grain yield with the least effect of heat and drought stress were identified as the potential donors for biofortification in the lentil breeding program.
小扁豆（Medikus）是一种富含蛋白质的冷季食用豆类，是蛋白质、益生元碳水化合物、矿物质和维生素的优质来源。随着气候变化，小扁豆种植区的高温和干旱胁迫变得更加频繁和强烈，对物候、谷物产量和营养品质产生了重大影响。本研究旨在评估高温和干旱胁迫对小扁豆物候、谷物产量和营养品质的影响。为此，对全球收集的100个小扁豆基因型在正常、高温和高温-干旱组合条件下进行了评估。方差分析显示，小扁豆基因型在物候性状、产量构成因素和谷物品质性状方面存在显著差异（<0.001）。在无胁迫条件下，小扁豆基因型中铁（Fe）的矿物质浓度在48至109毫克/千克之间，锌（Zn）的矿物质浓度在31至65毫克/千克之间，而粗蛋白含量在22.5%至32.0%之间。在胁迫条件下，铁、锌和粗蛋白含量显著降低，高温-干旱组合胁迫的影响比单独的高温胁迫更严重。在无胁迫和胁迫条件下，铁和锌浓度之间均观察到显著的正相关。根据谷物产量、粗蛋白以及铁和锌浓度，通过层次聚类分析将小扁豆基因型分为三类。具有高微量营养素含量、粗蛋白和谷物产量且受高温和干旱胁迫影响最小的有前景的小扁豆基因型被确定为小扁豆育种计划中生物强化的潜在供体。
