Heterosis in F1 hybrids derived from crosses of adapted Australian wheats
1992
Uddin, M.N. | Ellison, F.W. | O'Brien, L. (Sydney Univ., Narrabri (Australia). Plant Breeding Inst.) | Latter, B.D.H.
The hybrids and their parents were grown in hill plots in replicated experiments at 3 sowing times for 2 years (6 environments). The hybrids outyielded their parents in each of the six environments with levels of mid- and high-parent heterosis up to 31.5 and 26.8 percent respectively. The best hybrid outperformed the best check variety by an average yield margin of 18.2 percent. The hybrids were marginally but not significantly more stable in their yield performance across environments than their parents. While heterosis for grain protein content was generally negative, some hybrids were superior to the check varieties for both grain yield and protein content. The levels of heterosis and the absolute yield advantage displayed by the hybrids over the best pure line check varieties were sufficient to sustain the commercial production of hybrid wheats in northern New South Wales.
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