Correlation And Path Analysis Studies Among Soybean Genotypes Under Foothill Conditions Of Nagaland

Abstract

An experiment was laid out in randomized block design with three replications during kharif, 2015 at the experimental farm of School of Agricultural Sciences and Rural Development, Medziphema campus, Nagaland University to study character association and path analysis among twelve genotypes of soybean under foot hill condition of Nagaland. Studies were done on nine characters viz., days to 50 percent flowering, plant height, number of primary branches, number of secondary branches, number of pods per plant, number of seeds per pod, days to 80 percent maturity, 100 seed weight and seed yield per plant. At genotypic level seed yield showed strong positive correlation with days to 50% flowering, number of pods per plant, number of secondary branches per plant, number of primary branches per plant and plant height. In general, magnitude of genotypic correlation was higher than the phenotypic correlation. This suggested a strong genetic association between the traits and the phenotypic expression was suppressed due to environmental influence. The Path analysis showed that number of pods per plant has the highest positive direct effect followed by plant height at genotypic level. Thus, direct selection for number of pods per plant and plant height would likely be effective in increasing yield.