Abstract
Diallel technique was used for the study of some morphological plant characters in a diallel cross of four varieties of G. hirsutum L. Additive variation complicated with some non-allelic interaction was observed to be involved in the inheritance pattern of final height of the main stem, number of sympodial branches. For number of bolls plantl, additive genetic effects with partial dominance was detected. Whilst overdominance type of gene action was operative for number of monopodial branches, yield of seed collon and boll weight.
