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Inheritance of resistance to blast in some traditional and improved rice cultivars


Phytopathology 77(2): 323-326
Inheritance of resistance to blast in some traditional and improved rice cultivars
Rice blast, caused by Pyricularia oryzae, is one of the most destructive rice [Oryza sativa] diseases. Information on the inheritance of blast resistance is useful in breeding resistant cultivars. Five improved and four traditional cultivars were evaluated for the genetics of resistance to three Phillippine isolates of P. oryzae. Complete isolate-specific resistance was generally controlled by one or two dominant genes. A recessive gene controlled resistance in IR54 against one isolate. Linkage analyses showed that resistance to different isolates was conditioned by genes at different loci. At least seven genes conditioned resistance to the three isolates. Linkage between genes for resistance to different isolates was detected.


Accession: 001619306



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