Water deficit in the soybean breeding

Abstract

The climate unpredictability causes long periods of drought, becoming the main risk factor in soybeans production fields and consequent losses to farmers in Brazil and worldwide. As sessile organisms, plants are constantly challenged by a wide range of environmental stresses, including drought. Growth constraints and stress due to these environmental changes result in reduced yield and significant harvesting losses. The response to abiotic stresses is a very complex phenomenon, since several stages of plant development can be affected by a particular stress and often several stresses affect the plant simultaneously. In order to mitigate the damages caused by the climate, new soybean cultivars adapted to the drought and the diversified climate are necessary, as well as technological advances in the production of soybeans that must advance with the increase of cultivated area. Therefore, the mechanisms underlying tolerance and adaptation to stress have been the focus of intensive research. In this sense, the objective of this review is to provide an overview of the evolution of genetic improvement regarding the search for more drought-tolerant cultivars, as well as to verify which strategies are used in the genetic improvement of soybean in the search of these genotypes.

24‐Epibrassinolide promotes activation of physiological compensation mechanisms in response to drought stress and rehydration and improves yield in soybean

“…Currently, the yields of agricultural crops face reductions due to global climate changes that cause long periods of drought, becoming the main risk factor in soybean production fields, leading to significant losses in grain production and consequent losses to farmers in Brazil and worldwide (Pereira et al, 2019;Pimentel et al, 2021).…”

“…Currently, the yields of agricultural crops face reductions due to global climate changes that cause long periods of drought, becoming the main risk factor in soybean production fields, leading to significant losses in grain production and consequent losses to farmers in Brazil and worldwide (Pereira et al, 2019; Pimentel et al, 2021). Therefore, to meet future demands for food, the challenge for breeding programs and farmers is to develop more‐drought‐tolerant soybean cultivars, as well as using techniques that minimize the damage caused by water restriction as important alternative ways to avoid production losses.…”

Physiological alterations and enzymatic evaluation of soybean cultivars under water deficit

“…Soybean plants are affected by various abiotic stresses such as high salinity, low temperatures, mineral element toxicity, drought and others (Ferreira et al, 2020;Escalera et al, 2021;Gontijo et al, 2021;Pimentel et al, 2021). Drought or continuous water deficiency is one of the most important factors affecting growth, development, survival and productivity of the crop (Manavalan, Guttikonda, Tran, & Nguyen, 2009;Fried, Narayanan, & Fallen, 2019).…”