Inheritance of Blast Resistance in Two-Rowed Barley. Hiroshi Yaegashi, Tohoku National Agricultural Experiment Station, Yotsuya, Omagari, Akita 014-01, Japan. . Plant Dis. 72:608-610. Accepted for publication 17 February 1988. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0608.

Twelve of 24 cultivars of two-rowed barley were resistant to one isolate of the blast fungus (Pyricularia grisea) from barley, and 12 were susceptible. All cultivars were susceptible to two other isolates of P. grisea (one from barley and one from crabgrass) and to one isolate of P. oryzae from rice. Genetic analysis indicated that each of the resistant cultivars, Daisen Gold and Miho Golden, has a single dominant gene conditioning resistance to the barley isolate. This gene was designated as PHR-1. This is the first report confirming a gene for blast resistance in barley.