Induced Mutations For Enhancing Salinity Tolerance in Rice [chapter]

Chikelu Mba, Rownak Afza, Shri Mohan Jain, Glenn B. Gregorio, Francisco Javier Zapata-Arias
Advances in Molecular Breeding Toward Drought and Salt Tolerant Crops  
Rice is a staple food for Thailand and other Asian countries. Recently, flooding caused by the climate change has had a severe effect on the rice production in Thailand. Hence, breeding Thai rice for flood tolerance has become more important and an agenda for the Thai researchers. One of the breeding methods is using radiation to generate the genetic variation. Standard electron beam irradiation was mapped on 23 Thai rice varieties. RD31, a non-glutinous, photoperiod-insensitive rice variety,
more » ... s selected after the irradiation due to its several preferable agricultural traits, such as broad adaptation for diverse environments, resistance to white-back planthopper and high yield. The RD31 seeds were irradiated with 0.44 kGy electron beam. Then, the M 1 plants were planted in January 2014 and 500 main panicles were selected and harvested. After that, the M 2 plants were planted in December 2015. Agricultural traits, such as plant height and maturity date were observed in these plants. After that, about 3000 M 3 plants were selected and screened for submergence tolerance, and 317 tolerant mutant lines were identified. Furthermore, screening for blast resistance and good grain quality was carried out in the M 4 and M 5 generations to select for more traits.
doi:10.1007/978-1-4020-5578-2_17 fatcat:oy3opksgkzfufcpy47l7jk5vou