Abstract
Five varieties differing in endosperm texture and pericarp thickness were grown at College Station, Texas, in 1970. Grain starch in the waxy type, TX615, consisted of 100% amylopectin, but in the other varieties it was 30% amylose and 70% amylopectin. NSA740, with a predominantly floury endosperm, had the highest protein content. The content of minor fatty acids varied among varieties. TX615 had a higher chromium, iron and nickel content than the other varieties. Contents of copper and zinc also varied. NSA740 and the high-tannin variety GA615 had half the free sugars content of the other varieties. The distribution of tannins in four protein fractions separated by a modified procedure described elsewhere [see PBA 50, 10231] was compared in GA615 and in a variety with moderate tannin content. The protein content of the analogous fractions varied between the varieties
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