Heterosis in intra-gossypium Arboreum L. colton hybrids

Maximum heterosis for seed cotton yield was shown by cross LD 135 X HD 31 (67.6%). Crosses Vimar x HD 31 (64.4%), AKH 4 x HD 31 (60.9%), Daulat x G 1 (58.9%), LD 133 x Shyamali (57.1%), St 877 x HD 31 (52.6%), RG 3 x RG 2 (51.2%), LD 133 x HD 31 (50.6%) and LD 133 x RG 2 (50.1%) also showed exploitable heterosis. These crosses also exhibited significant heterosis for yield components. However, heterosis for halo length was low.