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Inheritance of the Associated Kernel Characters, High Lysine and Shrunken Endosperm, of the Barley Mutant Bomi, Risø 1508¹

The shrunken endosperm trait of the induced high lysine mutant Risø 1508 of the cultivar ‘Bomi’ barley (Hordeum vulgate L.) was found to be inherited as a simple recessive gene that expresses xenia, and hence was designated sex3c. The gene was tentatively assigned to chromosome 7 by primary trisomic analysis. Linkage with the male-sterile gene, msgl9, and the short rachilla hair gene, s, indicates that sex3c is located near the centromere in the short arm of chromosome 7. The high lysine trait of Risø 1508 was closely associated with the shrunken endosperm trait with close linkage of two genes or pleiotropy as possible explanations for the association.

Key Words: Hordeum vulgare L. • Xenia • Linkage • Pleiotropy • Trisomics • Protein • Microbiological assay

² Formerly research assistant in agronomy (presently assistant professor of agronomy, Dep. of Agronomy and Soils, Washington State Univ., Pullman, WA 99164) and professor of agronomy, respectively, Dep. of Plant and Soil Science, Montana State Univ., Bozeman, MT 59717.

Received for publication March 10, 1978.