Abstract
Mean squares for both general and specific combining ability, and reciprocal effects were highly significant for the expression of yield of seed-collon, number of bolls, boll weight, seed index and lint index. The larger proportion of variance resulting from specific combining ability revealed genetic effects to be predominantly non-additive for all the characters. An old and obsolete variety LSS proved to be the best general combiner for yield of seed-cotton and boll number, whilst E 288, an exotic, displayed its superiority for the manifestation of boll weight, seed and lint indices.