The Inheritance of Blast-Resistance in Indian Rice Variety, Hr-22

Efficient authentic fine mapping of the rice blast resistance gene Pik-h in the Pik cluster, using new Pik-h-differentiating isolates

“…1) compared to other known races seen as grade 1 in Table 1. Interestingly, such mild reaction of Pik-h was also reported previously against the mutant isolate Ken54-20-k + (Kiyosawa and Murty 1969). …”

“…Sasashigure (Kiyosawa and Murty 1969), by suppressing the isolate Ken54-20-k + , which has a mutation in Avr-Pik and was separated from a lesion developed in the incompatible Ken54-20 inoculation against lines with the Pik resistance gene. Therefore, Pik-h is expected to be allelic to Pik, and indeed there was no recombination between the resistances against the wild-type isolate Ken54-20 and mutant isolate Ken54-20-k + , i.e., between Pik and Pik-h (Kiyosawa and Murty 1969). Further, the resistance spectra of the Pik group genes are identical for the 12 IRRI isolates used for IRBL Pi monogenic line development except for a slight difference in Pi1.…”

“…The original Pik-h line K3 (Kiyosawa and Murty 1969) was obtained from the gene bank of the National Institute of Agrobiological Sciences (NIAS). The Pik-h monogenic line IRBLkh-K3 (indica), derived from K3 and susceptible cv.…”

“…The rice blast R-gene Pik-h was first reported by Kiyosawa and Murty (1969) from the test line K3 derived from a cross of an Indian cv. and Japanese cv.…”

Estimation of Genes in Blast Resistance in Elite Indica-type Rice (Oryza sativa L.) Varieties-bred at the International Rice Research Institute

“…Several resistance genes, Pita (Kiyosawa 1966), Pita-2 (Kiyosawa 1967), Pik-h (Kiyosawa and Murty 1969), Pik-p (Kiyosawa 1969), Piz-t (Yokoo and Kiyosawa 1970), Pib and Pit (Yokoo et al 1978), Pi6(t) (Yu 1991), Pi11(t) [Piz-h] (Zhu et al 1993), Pi8 (Pan et al 1996), Pi16(t) (Pan et al 1999) and Pi17(t) (RGC 1996) have been identified in Indica-type varieties. Regarding IRRI-bred varieties, FloresGaxiola et al (1983) reported the presence of two complementary genes and one dominant gene in the genetic analysis using hybrid progenies derived from a cross between IR8 and Tetep.…”