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Genetic Aspects of Triglyceride Structure in Maize¹

Stereospecific analysis reveals that the distribution of fatty acids is nonrandom among the three positions of triglyceridcs from the maize (Zea mays L.) strains, Illinois High Oil (IHO), R84, and C103. Positional specificity and fatty acid concentration effects are the major factors contributing to differences in fatty acid distribution in triglycerides. Both are under genetic control. The loci affecting levels of linoleate in IHO, R84, and C103 do not operate at the level of positional specificity; rather, the control is exerted in the concentration effect. Maternal effects detected in the reciprocal F₁'s are a function of concentration, and not positional specificity.

Key Words: Stereospecific analysis • Maternal effects • Pancreatic lipase • Positional specificity • Fatty acids

² Graduate Research Assistant (Present address: Ottawa Research Station, Canada Department of Agriculture, Ottawa, Ontario, Canada); Research Chemist, Plant Science Research Division, Agricultural Research Service, US Department of Agriculture, Urbana, 111.; and Professor of Plant Breeding and Genetics, University of Illinois, Urbana, 111., respectively.

Received for publication April 9, 1971.