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Shrunken Endosperm Mutants in Barley¹

Six spontaneous shrunken endosperm mutants in barley (Hordeum vulgare L.) were identified and described. Five of the mutants (se1 through se5) were inherited as maternal plant monofactorial recessives and one mutant se6 was inherited as a monofactorial recessive expressing xenia. The mutants varied in fertility, seed weight, and seive size assortment. Four mutants were located on chromosome one, one on chromosome three, and one on chromosome six, by using translocation breakpoints as markers. Mutants similar to se1 through se5 could be used as males in commerical hybrid seed production. Mutants similar to se6 could be used as preflowering selective genes for the female stock for hybrid seed production.

Key Words: Hordeum vulgare L. • Hybrids • Xenia • Linkage • Translocations • Trisomics

² Formerly graduate research assistant (now geneticist, Rambar, P. O. Box 1,110, Phoenix, AZ 85001) and professor of agronomy, respectively, Mont. State U., Bozeman MT 59715.

Received for publication July 8, 1974.

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