Vol. 12, Issue 11 (2023)

Author(s):
S Muthuramu and K Thangaraj

Abstract:
In order to study genetic variation, genetic inheritance, genetic advancement, and the relationship between yield and related characteristics of 17 advanced rice cultures, the experiment was carried out with dry direct seeded rice. All of the treatments have significant implications for the numerous features under study, according to the analysis of variance. With the exception of days to 50% blooming and panicle length, all features had a moderate GCV, whereas the number of effective tillers per plant, the number of spikes per square meter plot area, and grain yield showed the highest magnitude of PCV. Plant height was shown to have a high genetic progress and high heritability, which suggests that additive gene action plays a substantial role in the generational transmission of this feature. Straw yield was found to have a positive correlation with plant height, the number of effective tillers per plant, the number of spikes per square meter, and the length of the panicles. These results suggest that selecting for straw yield will help develop high-yielding genotypes in rainfed environments by simultaneously improving these traits. Days to 50% blooming, harvest index, and straw output all showed strong direct effects, while the number of effective tillers per plant had a somewhat direct impact on grain production. To increase grain yield under dry direct-sown rice cultivation, greater weight should be placed on the characteristics of straw yield, plant height, number of effective tillers per plant, number of spikes per square meter, and panicle length.