Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 16:87-88 (1976)
© 1976 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Relationship in Protein Concentration between Whole Oats and Oat Groats1

V. L. Youngs and Jerome Senturia2

We tested the feasibility of predicting protein concentration in either whole oats or oat groats if protein in one is known. Kjeldahl protein was determined on the whole oats and in the corresponding oat groats of 18 cultivars, most of which were grown at three U.S. locations over 2 years (105 samples). The regression equation was
Figure 1
G = 0.81 + 1.27 PO, where
Figure 2
G = predicted oat groat and PG = whole oat protein concentrations. Correlation between observed whole oat and oat groat protein was 0.98 significant at the 1% level of significance. The 95% confidence interval for predicting individual values of oat groat protein included a range of values falling within ±1.9 percentage points of the regression line,
Figure 3
G. The regression equation was tested with 12 additional groups of samples (311 samples) grown under less homogeneous experimental conditions. The mean square error of all samples compared to
Figure 4
G was 0.98. Oat groat kernel weight and groat yield were also determined for all samples. Correlations between these quality characteristics and groat protein concentration were very low.

Key Words: Avena sativa L. • Avena fatua L. • Groat yield • Groat weight

1 Cooperative investigation, ARS-USDA, and the Agric. Exp. Stn. Univ. of Wisconsin, Madison.

2 Research chemist, Oat Quality Laboratory, USDA, also professor, Dep. of Agronomy, Univ. of Wisconsin, Madison; assistant professor, Dep. of Agronomy and Dep. of Statistics, University of Wisconsin, Madison, WI 53706, respectively.

Received for publication March 11, 1975.




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