Mitochondrial Complementation in Sugar Beet
1972
Doney, D. L. | Theurer, J. C. | Wyse, R. E.
Physiologically active mitochondria were isolated from roots of 10-week old sugar beet (Beta vulgaris L.) inbreds and hybrids as well as inbreds in the bolting stage of growth. Mitochondrial oxidation and phosphorylation (ADP:O and R:C ratios) using alpha-ketoglutarate substrate were measured for each inbred, 1:1 mixtures of the inbreds, and for the hybridsi The 1:1 mixtures of inbreds had APD:0 and R:C ratios higher than either inbred parent for combinations that exhibit heterosis for root yield (complementation), and ADP-O and R:C ratios between the two inbred parents for combinations that do not show heterosis. Heterotic hybrids had ADP:O and R:C ratios slightly higher than those of the l:l mixlures.
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