The joint scalling test was employed to study the genetic system controlling anther culture response in wheat; the six generations were derived from the cross between the two highly responsive genotypes ICR-DH and ICR-33 with the non-responsive genotype Gimmeiza-7. The results indicated that highly significant differences between the six entries in two crosses for percentage callus formation and number of green plants/100 anthers. None of the F₁'s exceeded its high parent in percentage callus formation. While, heterosis for the high number of green plants was observed in cross-1. The additive-dominance model was adequate for percenta