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Performance of improved versions of Swarna introgressed with yield enhancing genes in multi-location trials

Swarna (MTU7029), an Indian mega-variety of rice, is cultivated on an estimated 8Mha of land. There is a pressing need to address yield stagnation and wider adaptability to irrigated lowland and rainfed ecologies as a result of the negative consequences of climate change and population growth. The p...

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Main Authors: Kousik, M.B.V.N., Punniakotti, E., Rekha, G., Chaitra, K., Harika, G., Dilip, T., Hajira, S.K., Swapnil, R.K., Laxmi Prasanna, B., Mastanbee, S.K., Anila, M., Ayyappa Dass, M., Kale, R.R., Sinha, Pragya, Vivek, G., Fiyaz, R.A., Senguttuvel, P., Subba Rao, L.V., Prasad, M.S., Laha, G.S., Krishna Satya, A., Sudhakar, P., Neeraja, C.N., Kim, S.R., Jena, K.K., Sundaram, R.M.
Format: Journal Article
Language:Inglés
Published: Association of Rice Research Workers 2023
Online Access:https://hdl.handle.net/10568/163967
Summary:Swarna (MTU7029), an Indian mega-variety of rice, is cultivated on an estimated 8Mha of land. There is a pressing need to address yield stagnation and wider adaptability to irrigated lowland and rainfed ecologies as a result of the negative consequences of climate change and population growth. The present study was aimed at improving Swarna for two yield-related traits through marker-assisted backcross breeding strategy by introgression of OsSPL14 (panicle branching) and SCM2 (stronger culm). Foreground and background selection was carried out at each generation. Homozygous BC2F2 plants harbouring both yield-enhancing genes were identified and advanced through pedigree selection till BC2F5 and evaluated in station trials. Three promising lines possessing higher yield over recurrent parent were identified, and a single line, IET 27661 exhibited superior yield in multi-location trials of the All India Coordinated Rice Improvement Programme (AICRIP) and was found to be promising.

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