Variability studies for yield and yield components in sunflower (Helianthus annuus L.)

ABSTRACT

A field experiment was conducted with 94 genotypes including three checks to study the variability for different characters. The range of variation for different characters indicated wide differences among the genotypes. The genotypic and phenotypic variation (GCV and PCV) was high for seed yield per plant, test weight and number of filled seeds was indicated these characters amenable for improvement by selection. Non additive gene action was observed for days to maturity, days to 50% flowering, oil content and number of leaves per plant. High heritability coupled with high genetic advance as percent of mean for the traits viz., number of filled seeds per plant, test weight and seed yield per plant indicated the additive gene action controlling these traits.