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Pigmentation Differences of Soybean Cultivars with Green Hypocotyl Color when Grown in Continous Light¹

Samples of 20 soybean (Glycine max L.) cultivars, classified as having green hypocotyl color, were grown in continuous 34,500 lux light. These cultivars could be placed into either of two groups based upon the presence or absence of a band of bronze pigmentation. The use of growth chamber light could be of value for the differentiation of soybean cultivars and the detection of offtypesin soybean seed lots.

Key Words: Glycine max (L.) Merr. • Growth chamber

² Plant physiologist and laboratory head, NSTL, Grain and Seed Division, AMS, USDA, Beltsville, Maryl.

Received for publication August 13, 1976.