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Genetic control of percent protein, percent oil, and sum of protein and oil as a percentage of the seed was investigated in two summer rape (Brassica napus L.) cultivars, Midas and Tower, and their F1, F2 and backcross generations. All three traits were found to be governed by additive gene action. Dominance was not significant and epistasis was absent. Selection for sum of protein and oil was shown to be more effective than selection for either protein or oil alone.
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Grami et al. (1977) studied this question.
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