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Inheritance of Reaction to Puccinia hordei in Barley. III. Genes in the Cultivars Cebada Capa and Franger. C. W. Roane, Professor of Plant Pathology, Department of Plant Pathology and Physiology, Virginia Polytechnic Institute, Blacksburg 24061; T. M. Starling, Professor of Agronomy, Department of Agronomy, Virginia Polytechnic Institute, Blacksburg 24061. Phytopathology 60:788-790. Accepted for publication 1 December 1969. DOI: 10.1094/Phyto-60-788.

Genes conditioning reaction to Puccinia hordei in the barley cultivars Cebada Capa (C.I. 6193) and Franger (C.I. 8811) are at the Pa5 and Pa4 loci, respectively. Pa4 is linked with Mla on chromosome 5. Linkage was detected between Pa3 in cv. Estate (C.I. 3410) and Pa5 in Cebada Capa, with recombination estimated at 33.8 ± 3.4%. The second gene in cv. Bolivia, previously designated Pax, is now relabeled Pa6.