Comparative growth rates in a reciprocal maize cross. 1. The kernel and its component parts
1948
Groszmann, A. | Sprague, G.F.
Growth rates were determined for the whole kernel and its component parts for dent and pop corn inbred lines and their reciprocal hybrids. Considering the whole kernel, both hybrids exhibited heterosis. A study of growth rates of their component parts, however, indicated heterosis was due to different causes in the two hybrids. This was explained on the basis of relative efficiency of endosperm and embryo as competitors for food materials. Heterosis appeared to be related to the action of specific genes rather than chromosomal dosage effects.
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