番茄种质集(包括天然变异株和甲烷磺酸乙酯诱导变异株)对热和干旱联合胁迫条件的抗逆性反应

IF 3.1 3区 农林科学 Q1 HORTICULTURE
R. Fonseca, R. Micol-Ponce, Carmen V. Ozuna, Laura Castañeda, C. Capel, Antonia Fernández-Lozano, A. Ortíz-Atienza, Sandra Bretones, José M. Pérez-Jiménez, A. S. Quevedo-Colmena, Juan D. López-Fábregas, T. Barragán-Lozano, Ricardo Lebrón, Celia Faura, J. Capel, T. Angosto, I. Egea, F. Yuste-Lisbona, R. Lozano
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引用次数: 0

摘要

农业系统目前正面临着重大问题,主要原因是全球气候变化背景下的人口增长率。气温升高导致植物热应激,影响作物产量,进而危及全球粮食生产和安全。气候变化还对世界各地的水资源供应产生了重大影响,许多地区的干旱变得更加频繁和严重。热胁迫和干旱胁迫的共同作用会增加植物的损害,导致植物发育不良和生产力下降。因此,开发耐热抗旱作物品种对于在这些挑战性条件下提高产量至关重要。番茄(Solanum lycopersicum L.)是一种主要的蔬菜作物,因其营养丰富而备受青睐,但它对极端温度特别敏感,极端温度对番茄坐果有显著的负面影响,并导致雄配子体流产。在这项研究中,采用了一种经典的遗传方法来鉴定对高温和干旱综合胁迫条件具有抗逆性的番茄基因型。通过对天然种质资源和甲烷磺酸乙酯(EMS)诱变群体进行表型筛选,鉴定出了大量耐受高温和干旱综合胁迫的番茄品系,特别是 161 个 EMS 品系和 24 个耐受高温和干旱综合胁迫的天然品系。此外,还利用 TILLING 和 Eco-TILLING 分析作为概念验证,分离出了以前作为不同物种非生物胁迫反应关键调控因子的基因的新遗传变异。这些变体的鉴定有可能为育种计划提供合适的植物材料,这些育种计划的重点是提高番茄对不利气候条件的适应能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Resilient Response to Combined Heat and Drought Stress Conditions of a Tomato Germplasm Collection, Including Natural and Ethyl Methanesulfonate-Induced Variants
Agricultural systems are currently facing significant issues, primarily due to population growth rates in the context of global climate change. Rising temperatures cause plant heat stress and impact crop yield, which in turn compromises global food production and safety. Climate change is also having a significant impact on water availability around the world, and droughts are becoming more frequent and severe in many regions. The combined effect of both heat and drought stresses increases plant damage, resulting in reduced plant development and productivity loss. Therefore, developing heat–drought-tolerant crop varieties is crucial for enhancing yield under these challenging conditions. Tomato (Solanum lycopersicum L.), a major vegetable crop highly appreciated for its nutritional qualities, is particularly sensitive to extreme temperatures, which have a significant negative impact on tomato fruit setting and cause male gametophyte abortion. In this work, a classical genetic approach was employed to identify tomato genotypes showing a resilient response to combined heat and drought stress conditions. A phenotype screening of a natural germplasm collection and an ethyl methanesulfonate (EMS) mutagenized population resulted in the identification of a significant number of tomato lines tolerant to combined heat and drought conditions, specifically 161 EMS lines and 24 natural accessions as tolerant. In addition, TILLING and Eco-TILLING analyses were used as proof-of-concept to isolate new genetic variants of genes previously reported as key regulators of abiotic stress responses in different species. The identification of these variants holds the potential to provide suitable plant material for breeding programs focused on enhancing tomato resilience to adverse climate conditions.
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来源期刊
Horticulturae
Horticulturae HORTICULTURE-
CiteScore
3.50
自引率
19.40%
发文量
998
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