Evaluation of new rice lines derived through induced mutation of traditional variety: Suduru samba

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Suduru samba is a traditional rice variety popular among most of the rice consumers in Sri Lanka. This cultivar produces white color, short round (samba) grain with higher rice grain cooking quality, good taste and aroma. However, susceptibility to lodging, neck blast and photosensitivity are major disadvantages of this variety. With the objective of developing shorter plants with desirable characters, seeds of Suduru samba were mutated using gamma irradiation. After the phenotypic selection and advancement of selfing generations two mutants SSR 26 and SSR 8 were evaluated on yield trials with standard checks Bg 357, Bg 360 and parent Suduru samba. The grain yield was recorded as 2.27, 2.90, and 1.01 t ha–1 for SSR 26, SSR 8 and Suduru samba, respectively. Further SSR 8 and SSR 26 having intermediate plant height and strong culm, showed resistance to lodging compared to the parent variety, Suduru samba,