Wide‐line nuclear magnetic resonance (NMR) was used to determine the oil content from groats of 129 spring and 40 winter oat strains. Groats from spring oats varied from 3.8 to 8.5% with a mean of 5.6% oil, while the winter oats varied from 6.8 to 9.8% with a mean of 8.2%. Protein content of the spring oats varied from 15.2 to 20.8% with a mean of 18.4%, while winter oats varied from 16.8 to 20.6% with a mean of 17.1%. Significant negative correlations were observed between oil content and protein content in spring and winter oats. Yields were not recorded for winter oats but there was a significant negative correlation between yield and protein content of the spring oats. There also appeared to be a slight negative association between kernel weight and oil content, especially in the winter oats.
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Brown et al. (1966) studied this question.