Assessment of the Effects of Gamma Radiation on Qualitative and Quantitative Traits of Red Rice (Oryza sativa L.) Variety MO 4
Shridevi A. Jakkeral¹*, Dushyanth Kumar BM²* and Shashikala S. Kolakar³*
1 AICRP on Rice, Zonal Agricultural and Horticultural Research Station, Brahmavar, Karnataka
2,3 Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka
*Corresponding author E-mail: shrideviajakkeral@uahs.edu.in, dushyanthkumarbm@uahs.edu.in,
Shashikalaskolakar@uahs.edu.in
Volume 17-(1), 2024 ; https://doi.org/10.58297/RVEC5951 Click here for Pdf
Received: 4th February, 2024; Accepted: 30th March, 2024
Abstract
Healthy seeds of red rice variety (Bhadra-MO 4) were exposed to different doses of gamma radiation at 15, 25, 35 and 45kR at Bhabha Atomic Research Centre, Mumbai, India. In M1 generation, 15kR and 25kR doses did not reduce the seed germination and its percentage. LD50 was found at 35kR dose, where seed germination was 51%, while at 45kR dose killed most of the seeds and the plant survival rate was reduced drastically (27%) as compared to the control (97%). Increased mean and variability were noticed in the number of productive tillers per plant, number of grains and filled grains per panicle and grain yield per plot at 15 and 25kR doses, meanwhile at 35kR dose exhibited reduced mean and increased quantitative variability and at 45kR dose showed decreased mean and variability for all the traits. Lower doses (15 and 25kR) of gamma radiation could be effectively used in mutation breeding for red rice crop improvement, which induces the stimulatory effect on grain yield.
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