Genotypic and Phenotypic Variability in Yield and other Quantitative Characters in Guar

Genotypic and phenotypic variability was studied in a collection of sixty-four indigenous varieties of guar (Cyamopsis psoralioides) under rainfed conditions at Agriculture Research Farm, Bassi (Rajasthan). A wide range of phenotypic variability was observed in plant height, number of branches, number of clusters, number of pods per plant, grain yield per plant and reaction to blight. Plant height, number of branches, 100 seed weight and reaction to blight were found to have comparatively high genetic coefficient of variation than other characters. Heritability estimates (broad sense) were high for plant height, number of branches, pod length, number of seeds per pod, 100 seed weight and reaction to blight while yield, number of clusters and number of pods per plant showed low heritability. The characters possessing high heritability indicated high genetic advance which may be due to additive gene effects.