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Fayoum University (2022)

Genetic mapping of drought tolerance in Brassica

Abd El-Razik، Wesam Wajih.

Titre : Genetic mapping of drought tolerance in Brassica

Auteur : Abd El-Razik، Wesam Wajih.

Etablissement de soutenance : Fayoum University

Grade : Master of Science in Botany 2022

Résumé partiel
Brassicaceae is regarded as one of the most economically important plant groups worldwide, which consists of many substantial fodder crops, for example, Brassica napus, Brassica rapa, and Brassica oleracea (Gómez- Campo 1999) . Brassica species are broadly used in human food mostly as a necessary source of vegetables, palatable oils, and condiments (Al- Shehbaz 1984 ; Gómez-Campo 1999 ; Raza et al. 2020) . Brassica regarded as one of the greatest important genera of the Brassicaceae which containing up to 100 groups such as cauliflower, brussels sprouts, broccoli, various mustards, and turnip (Gómez-Campo 1999) . Brassica oleracea (B. oleracea) wild forms largely exist in costal terrains of Western Europe (Warwick 2011) . Brassica oleracea species is the main constituent of the diets in many nations of the developing countries. It is rich in minerals, dietary fiber, vitamin A, B1-2, C, E, and K (Fahey and Talalay 1995 ; Raza et al. 2020 ; Wink and Van Wyk 2008) and other possible beneficial factors, such as anti-cancer agents’ compounds (Fahey and Talalay 1995) . Plants are suffered from various environmental stresses involving abiotic and biotic stresses. Drought is one of the most critical abiotic stresses which negatively affect plant progress and development is (Rana et al. 2013 ; Zlatev and Lidon 2012) . Drought is a natural phenomenon, which exists in both developing and developed countries and all communities (Dai 2013) . Global climate changes are the major factor causing drought stress all over the world (Mishra and Singh 2011 ; Rana et al. 2013) . Nevertheless, there are numerous other causes for drought, such as high temperature, high intensity of light, and dry wind, all of which induce evaporation of water from the soil (Dai 2013) . Otherwise, there is enough water in the soil, but plants cannot absorb it due to several conditions, for example, flooding, low soil temperatures, and salinity. This kind of water stress is known as a pseudo-drought or physiological drought (Arbona et al. 2013 ; Athar and Ashraf 2009) . Plants make several physiological, morphological, molecular, and biochemical reactions to adapt to water scarcity. The responses range from a molecular level to a whole plant level (Beck et al. 2007) . The checkup of drought tolerance during different growth periods is necessary to disentangle the problem of drought. Brassica oleracea can be regarded as moderately or sensitive tolerant to cases of abiotic stress such as drought and salinity (Beacham et al. 2017 ; Zhang et al. 2014)

Présentation étendue (EULC)

Page publiée le 9 mars 2022