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Published in Crop Sci 14:598-599 (1974)
© 1974 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Weight, Oil, and Fatty Acid Composition of Components of Normal, Opaque-2 and Floury-2 Maize Kernels1

J. M. Arnold2, Albin Piovarci3, L. F. Bauman4 and C. G. Poneleit5

Normal and opaque-2 kernels from segregating maize (Zea mays L.) ears were examined for kernel components, oil content, and fatty acid composition. Normal kernels were higher in kernel and endosperm weight and embryo oil concentration, and lower in embryo weight than opaque-2 kernels. Compared to normal, the oil from opaque-2 kernels was slightly but significantly higher in oleic acid and lower in linoleic acid composition. Comparison of normal and floury-2 kernels from segregating ears showed kernel and endosperm weights of the normal kernels were greater than for floury-2, and embryo weight was similar. In a comparison of near-isogenic floury-2 and normal single-cross hybrids, the kernel components were heavier in normal, while percent oil was greater for floury-2 owing largely to a greater proportion of embryo. Percent oil in embryo was less in floury-2 hybrids.

Key Words: Kernel components • Modified-protein maize

1 Journal Paper No. 5285 from the Department of Agronomy, Purdue University Agricultural Experiment Station, Lafayette, IN 47907. Supported by the Agency for International Development Contract 2809 with Purdue University entitled "Inheritance and Improvement of Protein Quality and Content in Maize."

2 Formerly Post Doctoral Associate, Agronomy Department (present address: Dekalb AgResearch, Inc., Mt. Olive, NC 28365).

3 Formerly Post Doctoral Associate, Agronomy Department (present address: Maize Research Institute, Trnava, Trstinska 13, Czechoslovakia).

4 Professor of Agronomy, Purdue University.

5 Associate Professor of Agronomy, University of Kentucky, Lexington, KY 59706.

Received for publication October 26, 1973.




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