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Published in Crop Sci 15:44-46 (1975)
© 1975 Crop Science Society of America
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Inheritance of Kernel Fatty Acid Composition Among Six Maize Inbreds1

N. W. Widstrom and M. D. Jellum2

Three single crosses among six dent corn (Zea mays L.) inbreds, and segregating generations, were produced for investigation of the inheritance of five major fatty acid components by the method of single kernel analysis. Generation mean analysis showed that additive variation was predominant for palmitic, oleic, and linoleic acid composition, whereas additive and dominance sources of variation were of about equal importance for stearic acid. Differences were nonsignificant between inbreds for linolenic acid composition; genetic effects could not be determined. Individual kernel analyses showed that differences in palmitic and oleic acids of the inbreds Ab26A and X-187 were each controlled mainly by a single gene, though probably not the same gene. The gene controlling high palmitic acid in Ab26A was partially dominant whereas the gene controlling high oleic acid composition showed almost complete dominance. The data did not show single-gene control of linoleic acid in this cross.

A two-factor hypothesis, with one factor showing partial dominance and the other no dominance for low linoleic acid, best explains the difference in linoleic acid of the inbreds GE82 (low) and R196 (high).

Key Words: Genetic variation • Palmitic acid • Oleic acid • Linoleic acid • Corn oil • Zea mays L.

1 Contribution of ARS, USDA, in cooperation with the University of Georgia College of Agriculture Exp. Stn., Coastal Plain Stn., Tifton, GA 31794 and Georgia Station, Experiment, GA 30212.

2 Research geneticist, Southern Grain Insects Research Laboratory, ARS, USDA,, Tifton, GA 31794 and professor of agronomy, Georgia Station, Experiment, GA 30212, respectively.

Received for publication May 16, 1974.




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