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Accueil du site → Doctorat → Inde → 2020 → Physio molecular screening of rice Oryza sativa L lines for submergence and drought tolerant traits

Acharya Narendra Deva University of Agriculture and Technology, Ayodhya (2020)

Physio molecular screening of rice Oryza sativa L lines for submergence and drought tolerant traits

Milan, Ram

Titre : Physio molecular screening of rice Oryza sativa L lines for submergence and drought tolerant traits

Auteur : Milan, Ram

Université de soutenance : Acharya Narendra Deva University of Agriculture and Technology, Ayodhya

Grade : Doctor of Philosophy (PhD) 2020

Résumé
An experiment was conducted with rice lines SN-180701, SN-180702, SN-180703, SN-180704, SN-180705 and its parent Swarna Sub 1, Nagina -22 to evaluated the submergence and drought related traits in rice lines. Thirty five days old rice seedlings were exposed to submergence treatment. Plant height, shoot elongation catalase and peroxidise activity were recorded at the end of 11 days submergence treatment. High catalase and peroxidise activity were recorded in rice lines plants while less in Nagina-22. Nagina-22 failed survives after 20 days of desubmergence. Survived lines were further exposed to 15 days severe drought stress at reproductive stage. Relative water content (RWC), leaf rolling and proline content were recorded at the end of drought treatment. High proline content, RWC and less leaf rolling were recorded in rice lines and Nagina-22. Thus, the rice lines showed both submergence and drought dual tolerant traits. Parental polymorphism of rice genotype were done by 15 SSR primers in Swarna Sub 1, Nagina-22 and its 5 lines. Out of 15 markers, only RM219, ART 5 for submergence and RM 302 and RM272 for drought amplified in rice lines with various amplicon sizes. The rice lines also showed less percent reduction under dual stress condition over control.

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Page publiée le 6 février 2021