Vol. 12, Issue 10 (2023)

Author(s):
Divya Patel, BK Davda and KG Modha

Abstract:
The 'Wani Local' sorghum genotype was exploited to create a mutation by gamma radiation. The experimental material included several gamma radiation dosages viz., 100 Gy, 200 Gy, 300 Gy, 350 Gy, 400 Gy and 500 Gy as well as control seeds. Individual plants were selfed, harvested and recorded for putative mutations that might have been present in the M₁ generations. During rabi 2022-23, the M₂ generation, which comprised total of 120 mutant progenies from six different treatments, was assessed using compact family block design with three replications. Among M₂ generation, genetic variability was significant for yield and yield contributing traits. In most of the treatments, relative higher mean performance was seen as compared to control for all traits, with the exception of days to 50% flowering, days to maturity and panicle length. For the majority of the characters in the segregating M₂ generation, the GCV and PCV values revealed significant variability. High GCV, PCV, heritability and GAM values were found for grain yield per plant, panicle weight, straw yield per plant and harvest index.