Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 9:746-749 (1969)
© 1969 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Fatty Acid Composition of Oil from Normal and High-Amylose Backcross Strains of Corn (Zea mays L.)1

M. D. Jellum, J. L. Helm, V. L. Fergason and M. S. Zuber2

Gas-liquid chromatography was used to determine the fatty acid composition of oil extracted from the germ and endosperm fractions of the corn kernel. Four normal dent inbred lines and high-amylose strains derived with one to four generations of backcrossing to the normal recurrent parents were studied. Significant differences in palmitic, stearic, oleic, linoleic, and linolenic acids were found among inbred lines and generations of backcrossing. Oil composition of the germ for three of the four inbreds tended to regress toward the oil composition of the recurrent parent with increasing number of generations of backcrossing. For all backcross strains and normal inbreds, the oil from the endosperm was higher in palmitic, stearic, and linolenic acids and lower in linoleic acid when compared with the germ oil. No consistent relationship between endosperm and germ oil was shown for oleic acid. The endosperm oil of the high-amylose strains was higher in palmitic and stearic acids and lower in linoleic acid than the endosperm oil of the normal recurrent parents. Composition of the endosperm oil from high-amylose strains did not regress toward the recurrent parent values with increasing number of generations of backcrossing.

Key Words: Germ lipids • Endosperm lipids • Maize

1 Joint contribution from the University of Georgia College of Agriculture Experiment Stations, Georgia Station, Experiment, Georgia 30212, Journal Series Paper No. 471; University of Missouri Agricultural Experiment Station, Columbia, Missouri 65201, Journal Series Paper No. 5647; and Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture.

2 Associate Professor of Agronomy, University of Georgia; Instructor (now Geneticist, Anheuser-Busch, Inc.); Assistant Professor (now Specialty Plant Breeder, Bear Hybrid Corn Company); and Research Agronomist, Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture and Professor of Agronomy, University of Missouri.

Received for publication April 21, 1969.




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Copyright © 1969 by the Crop Science Society of America.