VIEW ARTICLE

Genetics

Inheritance of Resistance to Bacterial Blight in Rice Cultivar Cas 209. A. Yoshimura, Research fellow, The International Rice Research Institute (IRRI), Los Baņos, Laguna, Philippines; T. W. Mew(2), G. S. Khush(3), and T. Omura(4). (2)(3)Plant pathologist, plant breeder, respectively, The International Rice Research Institute (IRRI), Los Baņos, Laguna, Philippines, (4)Professor of Plant Breeding, Faculty of Agriculture, Kyushu University, Fukuoka, Japan. Phytopathology 73:1409-1412. Accepted for publication 2 May 1983. Copyright 1983 The American Phytopathological Society. DOI: 10.1094/Phyto-73-1409.

The mode of inheritance of resistance in rice cultivar Cas 209 to bacterial strain PX086, a representative of race II of Xanthomonas campestris pv. oryzae in the Philippines, was studied. The analysis of F₁, F₂, and backcross populations from the crosses of Cas 209 with susceptible cultivars revealed that Cas 209 resistance was controlled by a single dominant gene. Tests for linkage relationships indicated that this newly identified dominant gene was linked with Xa-4 with a recombination value of 27.4%, but was independent of xa-5. This new gene for bacterial blight resistance was designated Xa-10.