Abstract: Significant differences among hybrids and their parents were noted. Th boll weight and staple length reflected additive type of gene action while in seed index and lint index, over-dominance gene action was observed. The non-significant deviation of regression line from unit slope indicates the absence of non-allelic interaction in staple length showing absence of epistatsis providing positive lines for isolating superior genotypes. Boll weight and lint index shows the significant deviation from unit slope which surely indicates the presence of opitstasis.