The main purpose for mutation induction in rice crop, is to increase the mutation frequency rate in ‎a short period of time, in developing new plant varieties with useful agronomical traits in order for ‎sustainable food production to become a possibility. Exploitation of spontaneous mutation ‎frequency rate is veryboth rare and exceptional, being difficult to exploit by the plant breeders. ‎Commonly, mutations are induced by chemical (e.g. ethyl methane sulfonate) and physical (e.g. ‎gamma radiation) mutagen treatment of both seed and vegetatively propagated crops. Here, over ‎‎10,000 seeds of rice variety Gohar were initially subjected to mutagenesis, using ethyl methane ‎sulfonate (EMS). The EMS-treated seeds were rinsed with deionized water and then sown in the ‎seedbed. A population of about 5250 M1 plants was developed. At maturity, a single panicle (one ‎ripening panicle) was picked from each plant. The Nextfollowing year, to achieve 3510 M2 plants, the ‎seedlings selected from the nursery grown panicles were grown in the field. Then, one panicle ‎was chosen from each mature plant in M2 to get the M3 population. In the M4 population, the ‎selection criteria were early maturity, high-fertility rate, dwarf growth habit and plant type. ‎Eventually, six plants possessing early maturing trait were selected for commercial release.‎

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