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Inheritance of a Trypsin Inhibitor Variant in Seed Protein of Soybeans¹

Soybean [Glycine max (L.) Merrill] seeds from the backcross ‘Harosoy³’ x T245 were analvzed for electrophoretic banding pattern of SBTI-A². Harosoy produced a fast-moving band at Rf 0.79 and T245 produced a slowmoving band at Rf 0.75. All seeds having either fast or slow bands bred true in the next generation. Seeds having both fast and slow bands produced progenies in a ratio of 26 fast:50 fast and slow:24 slow. Our evidence confirmed that a single locus with two codominant alleles, which we designate as Ti¹ and Ti³, controls the two protein forms.

Key Words: Glycine max (L.) Merrill • Codominance • Gel electrophoresis • SBTI-A₂

² Assistant Professor and Professor of Plant Genetics, University of Illinois, Urbana, Ill., respectively. Supported in part by PHS grant FR 07030 and a grant from the National Soybean Processors Association.

Received for publication August 31, 1971.

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				S. P. PULL, S. G. PUEPPKE, T. HYMOWITZ, and J. H. ORF Soybean Lines Lacking the 120,000-Dalton Seed Lectin Science, June 16, 1978; 200(4347): 1277 - 1279. [Abstract] [PDF]