Gain of virulence caused by insertion of a Pot3 transposon in a Magnaporthe grisea avirulence gene |
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Authors: | Kang S Lebrun M H Farrall L Valent B |
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Affiliation: | DuPont Central Research and Development, Experimental Station, Wilmington, DE 19880-0402, USA. sxk55@psu.edu |
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Abstract: | The avirulence gene AVR-Pita in Magnaporthe grisea prevents the fungus from infecting rice cultivars carrying the disease resistance gene Pi-ta. Insertion of Pot3 transposon into the promoter of AVR-Pita caused the gain of virulence toward Yashiro-mochi, a rice cultivar containing Pi-ta, which demonstrated the ability of Pot3 to move within the M. grisea genome. The appearance of Pot3 in M. grisea seems to predate the diversification of various host-specific forms of the fungus. |
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