Department of Plant Breeding, G. B. Pann University of Agirculture ana Technology, Pantnagar (Nainital)
Online published on 25 January, 2012.
Seventeen F1’s involving eight promising soybean varieties were studied to find out the extent and nature of heterosis. The better parent heterosis for seed yield ranged from -30.3% to 67.8% with a mean heterosis of 26.1%. The two primary yield components viz. seeds per plant and pods per plant also showed considerable better parent heterosis, but this was negative for seeds per pod and seed size. Hybrids Bragg × Clark-63 and Hardee × Punjab-1 exhibited maximum heterosis for seed yield, the value for which were 67.8 and 51.5% respectively.
The heterosis for seed yield appeared to be due to high manifestation of heterosis for number of pods, which in turn was due to additive action of height and branches.
