Japanese Journal of Phytopathology
Online ISSN : 1882-0484
Print ISSN : 0031-9473
ISSN-L : 0031-9473
Genetic Studies on Resistance of Rice Plant to Blast Fungus
III. Decline in the blast resistance of Ginga, a descendant variety of Sensho
Iwasaburo GOTO
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1978 Volume 44 Issue 4 Pages 447-455


Lazy-Ginga, la-isogenic line of Ginga, proved that Rb1 of Sensho linked with la had not been introduced to Ginga. Absence of Rb1 caused a significant decline of blast resistance to Ginga. From comparison of derivatives with their common parent, Sensho, it was ascertained that the present decline commenced in the early stage of the breeding program.
The two blast resistance genes which controlled the moderate resistance of Ginga were assumed to be multiple alleles of the two ones other than Rb1 of Sensho.

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