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E.g., Wessler, regeneration, PubMed ID 17578919.

expand all sections collapse all sections  Reference "Rice Pi-ta gene confers resistance to the major pathotypes of the rice blast fungus in the United States"
Reference ID 9511
Title Rice Pi-ta gene confers resistance to the major pathotypes of the rice blast fungus in the United States
Source Phytopathology, 2004, vol. 94, pp. 296-301
Authors (9)
Abstract The Pi-ta gene in rice prevents the infection by Magnaporthe grisea strains
containing the AVR-Pita avirulence gene. The presence of Pi-ta in rice cultivars
was correlated completely with resistance to two major pathotypes, IB-49 and IC-
17, common in the U.S. blast pathogen population. The inheritance of resistance
to IC-17 was investigated further using a marker for the resistant Pi-ta allele
in an F2 population of 1,345 progeny from a cross of cv. Katy with experimental
line RU9101001 possessing and lacking, respectively, the Pi-ta resistance gene.
Resistance to IC-17 was conferred by a single dominant gene and Pi-ta was not
detected in susceptible individuals. A second F2 population of 377 individuals
from a reciprocal cross between Katy and RU9101001 was used to verify the
conclusion that resistance to IC-17 was conferred by a single dominant gene. In
this cross, individuals resistant to IC-17 also were resistant to IB-49. The
presence of Pi-ta and resistance to IB-49 also was correlated with additional
crosses between ‘Kaybonnet’ and ‘M-204’, which also possess and lack Pi-ta,
respectively. A pair of primers that specifically amplified a susceptible pi-ta
allele was developed to verify the absence of Pi-ta. We suggest that Pi-ta is
responsible for resistance to IB-49 and IC-17 and that both races contain AVR-
Pita genes.

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