Vol. 12, Issue 11 (2023)

Author(s):
Kushal Rane, Pravin Vanave, Mahendra Palshetkar and Sanjay Misal

Abstract:
The present study was carried out during the Kharif 2022 at the Breeding Farm, Regional Agricultural Research Station, Karjat, Dist. Raigad to estimate the genetic variability among rice genotypes for submergence tolerance. In the experiment, 39 genotypes were laid down into a Randomized block design (RBD) having three treatments viz., Control, 7 days and 14 days under submergence and two replications. According to the analysis of variance in the current experiment, genetic variations were significant for all the characters studied, which revealed that genotypes reported a wide range of variation. The results showed that environmental variance for characters spikelet fertility and starch was higher than genotypic variance at non-stress and 7 day stress. Days to fifty percent flowering and spikelet fertility had the highest phenotypic and genotypic variance at 14 day submergence stress. The PCV and GCV were high for all character at 14 days submergence, survival percentage having highest of all. Spikelet fertility and starch showed moderate heritability, while other parameters had high heritability (>60%). This implies that the genotypes used in the study have a varied genetic background and selection for these qualities may help the genetic improvement of crops.