Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola-444 104, India
* Present Andress: College of Agriculture, Nagpur, Innia.
Twenty one American cotton hybrids, derived through 7 x 7 half diallel, alongwith their seven parents and two standard hybrids were evaluated to estimate the magnitude of heterosis for seed cotton yield and other components over mid parent, standard variety (PKV Rajat) and standard hybrid (PKV Hy. 2). Heterosis was highest for seed cotton yield per plant followed by number of bolls Per plant, number of sympodia per plant and seed index. The crosses DHY 286 x LRA 5166 and PH 93 X DHY 286 shall be considered for exploitation of hybrid vigour.
