1Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India
2Regional Research Station, Tamil Nadu Agricultural University, Vridhachalam-606 001, Tamil Nadu, India
3Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India
4Nuclear Agriculture and Biotechnology Division, BARC, Trombay, Mumbai-400 085, Maharashtra, India
5Community Science College and Research Institute, Tamil Nadu Agricultural University, Madurai-625 104, Tamil Nadu, India
Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai-625 104, Tamil Nadu, India
*Corresponding Author: P. Arunachalam, Department of Plant Breeding and Genetics, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai-625 104, Tamil Nadu, India, Email: arunachalp@gmail.com
Online published on 29 August, 2020.
A study was conducted to assess the chlorophyll and viable mutation frequency in M2 generation of Anna(R) 4 rice variety induced through gamma rays and electron beam radiations with different dosages viz., 200Gy, 250Gy, 300Gy and 350Gy. The results showed that chlorophyll and viable mutation frequency was higher in electron beam (8.62 and 22.30) compared to gamma rays (8.11 and 13.40). The electron beam was found to have higher mean effectiveness (0.059) compared to gamma rays (0.04), while higher efficiency (0.723) was observed in gamma rays and fairly less efficiency was reported in electron beam (0.540). However, higher frequencies of viable and useful mutants were obtained in electron beam. Therefore the electron beam can be used as an alternate source for physical mutagen to produce useful mutants in rice improvement.
Chlorophyll mutants, Effectiveness, Efficiency, Electron beam, Gamma rays, Rice
