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United States Department of Agriculture

Agricultural Research Service

Research Project: GENETICS, POPULATION BIOLOGY, AND HOST-PARASITE INTERACTIONS OF CEREAL RUST FUNGI AND THEIR DISEASES

Location: Cereal Disease Laboratory

Title: Identification of the Pgt effectors that are recognized in rice

Authors
item Katagiri, Fumiaki -
item Tsuda, Yoya -
item Stoddard, Thomas -
item Cuomo, Christina -
item Glazebrook, Jane -
item Szabo, Les

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: June 13, 2011
Publication Date: N/A

Technical Abstract: Emergence of new strains of the wheat stem rust pathogen Puccinia graminis f. sp. tritici (Pgt), Ug99 and its relatives, threatens world wheat production; more than 80% of the wheat varieties currently being used world-wide are susceptible to these strains. Small wheat farmers in the developing world do not have the resources to use fungicides and rely entirely on host resistance. Therefore, rapid discovery and deployment of durable resistance (R) genes against Pgt Ug99 are urgent needs to protect such small farmers and wheat production in the developing world. It has been noted that rice is completely free of rust disease, including stem rust disease. This observation suggests that rice carries durable and broad-spectrum R gene(s) against Pgt. As rice and wheat are in the same taxonomic family, the chance that a rice R gene functions in wheat is expected to be high. The long-term goals of our research are: (i) to isolate multiple broad-spectrum R genes against Pgt from the non-host rice; and (ii) to elucidate the genetic architectures of non-host resistance in both rice and Pgt. The latter goal will enable a rational strategy of rice R gene deployment for durable Pgt resistance in wheat and for conservation of non-host resistance against Pgt in rice. In the short term, identification of the Pgt effector genes that are recognized in rice is required to achieve these goals. Here we discuss a strategy for rapid identification of such Pgt effector genes.

Last Modified: 4/19/2014
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