Amélioration génétique du riz pour la résistance aux maladies à l'aide de rayons gamma
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Amélioration génétique du riz pour la résistance aux maladies à l'aide de rayons gamma

Amélioration génétique du riz pour la résistance aux maladies à l'aide de rayons gamma


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About the Book

Les maladies du riz sont l'un des principaux facteurs limitant la production de riz dans le monde, en particulier les maladies de la pyriculariose (Magnaporthae grisea) et du bakanae (Fusarium moniliforme). Cette étude a donc été menée pour améliorer la résistance du riz aux maladies de la pyriculariose et du bakanae, ainsi que le rendement et les caractéristiques liées au rendement, en utilisant des rayons gamma et des marqueurs moléculaires. Les grains de riz ont été irradiés avec différentes doses de rayons gamma (150, 200, 250, 300 Gy). Onze mutants de riz ont été sélectionnés et évalués pour leur résistance à la pyriculariose et à la bakanae dans des conditions d'infection naturelle et artificielle. Seuls neuf mutants étaient résistants à l'une ou l'autre des maladies ou à l'une d'entre elles. Le criblage moléculaire des gènes de résistance (R) aux maladies de la pyriculariose et des bakanaes a été effectué pour les mutants sélectionnés et leurs parents à l'aide de marqueurs moléculaires. Les résultats ont montré que les mutants résistants à la pyriculariose ont une combinaison de gènes de résistance partielle et complète qui confèrent une résistance durable à toutes les races de pyriculariose. Par conséquent, les marqueurs moléculaires sont des outils puissants pour accroître l'efficacité de la sélection dans les programmes d'amélioration génétique. En outre, la sélection par mutation est une approche très efficace pour développer de nouveaux génotypes résistants à la pyriculariose et à la maladie du bakanae chez le riz.


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Product Details
  • ISBN-13: 9786208081737
  • Publisher: KS Omniscriptum Publishing
  • ISBN-10: 6208081734
  • Publisher Date: 13 Sep 2024


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Amélioration génétique du riz pour la résistance aux maladies à l'aide de rayons gamma
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