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Nullisonmic-Tetrasomic Wheat for Agronomic and Nutritional Studies¹

Chromosomes of Triticum aestivum L. homoeologous groups 1 and 6 have genes coding for synthesis of the endosperm gliadin components. A-gliadin, coded by genes on chromosome 6A, and possibly other gliadins, produce symptoms in humans with celiac disease. It may be possible to eliminate toxic proteins through breeding. As a first attempt, nullisomic 6A-tetrasomic 6B (N6AT6B) and N6A-T6D limes of cultivar ‘Chinese Spring,’ which do not produce A-gliadin, were grown in sufficient quantities for human feeding trials. Both lines produced satisfactory yields of grain for specialty uses. N6A-T6B was more desirable agronomically and produced less agliadins than N6A-T6D. Fertility of the N-T lines was only slightly lower than that of Chinese Spring.

Key Words: Triticum eastivum L. • Aneuploidy • Gliadin proteins • Toxic Proteins • Celiac disease

² Former associate in agronomy (present address: Institute for research assistant, professor of Agronomy (Davis), and research chemist (Berkeley).

Received for publication July 25, 1977.