Genetic variability, correlation and path coefficient studies in upland rice (Oryza sativa L.) genotypes of Nagaland

Abstract

Eighteen genotypes of rice were evaluated in randomized complete block design at SASRD, Medziphema during kharif season of 2019 with two replications. The ANOVA showed significant differences among genotypes for all the characters studied, indicating high degree of variability in the material. High genotypic coefficient of variation and phenotypic coefficient of variation were recorded for panicle weight followed by yield per plant and 100 seed weight indicating presence of variation for these traits in the present population. High heritability coupled with high genetic advance as percent of mean was recorded for days to 50% flowering days to 80% maturity, panicle weight, number of seeds per panicle, 100 seed weight and yield per plant. At genotypic level, characters like panicle weight showed positive correlation with yield/plant indicating relative utility of this trait for selection. Path analysis revealed that panicle weight should be given more importance while selection for improvement of yield.