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, 125 (5), 1047-55

The Isolation of Pi1, an Allele at the Pik Locus Which Confers Broad Spectrum Resistance to Rice Blast

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The Isolation of Pi1, an Allele at the Pik Locus Which Confers Broad Spectrum Resistance to Rice Blast

Lixia Hua et al. Theor Appl Genet.

Abstract

We report the isolation of Pi1, a gene conferring broad-spectrum resistance to rice blast (Magnaporthe oryzae). Using loss- and gain-of-function approaches, we demonstrate that Pi1 is an allele at the Pik locus. Like other alleles at this locus, Pi1 consists of two genes. A functional nucleotide polymorphism (FNP) was identified that allows differentiation of Pi1 from other Pik alleles and other non-Pik genes. A extensive germplasm survey using this FNP reveals that Pi1 is a rare allele in germplasm collections and one that has conferred durable resistance to a broad spectrum of pathogen isolates.

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