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Pirnajmedin, Fatemeh; Majidi, Mohammad Mahdi; Jaškūnė, Kristina
Plant physiology and biochemistry, August 2024, 2024-08-00, 20240801, Volume: 213Journal Article
Drought stress is one of the most critical abiotic factors which negatively impacts on growth, productivity, and survival of plants. Grass species have an important role in the sustainable intensification of cropping systems. This review focus on the specific drought tolerance characteristics in grass species and application of prevalent classical and molecular methods for genetic improvement of them to drought stress. Generally, grass species adapt to drought stress by utilizing more than one strategy including of changes in the root growth, photosynthetic pigments, activation of antioxidant enzymes, and accumulation of compatible osmolytes. They also have other specific characteristics consisted of summer dormancy, drought recovery, and persistence, which lead to drought adaptation after prolonged drought. Studies on different grasses, indicated that most of above mentioned traits usually have positive correlation with drought tolerance. Also, high heritability has been reported for most of them in different grasses. Therefore, an effective index might be considering in identification of drought tolerance genotypes. Recently, high-throughput imaging phenotyping and advanced molecular techniques such as genotyping-by-sequencing (GBS), RNA sequencing, genome-wide association study, and genome editing help conventional breeding methods to increase the accuracy, selection efficiency, genetic gains, and speed of breeding programs for developing drought tolerant cultivars. •Climate change be an alarming situation in all over the world, which is predicted to lead to increased incidence of drought.•Grasses adapt to drought stress by different morphological, physiological, and biochemical responses, and genetics pathway.•Knowledge on the inheritance of drought tolerance traits is necessary for improving the efficiency of breeding programs.•Using of molecular techniques along with conventional breeding methods increased the accuracy and speed of breeding programs.
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