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Copyright 2005 by the Genetics Society of America DOI: 10.1534/genetics.105.042218
 

Summary: Copyright 2005 by the Genetics Society of America
DOI: 10.1534/genetics.105.042218
RESISTANCE TO FUSARIUM OXYSPORUM 1, a Dominant Arabidopsis
Disease-Resistance Gene, Is Not Race Specific
Andrew C. Diener and Frederick M. Ausubel1
Department of Genetics, Harvard Medical School and Department of Molecular Biology, Massachusetts General Hospital,
Boston, Massachusetts 02114
Manuscript received February 22, 2005
Accepted for publication May 20, 2005
ABSTRACT
Arabidopsis thaliana ecotypes differ in their susceptibility to Fusarium wilt diseases. Ecotype Taynuilt-0 (Ty-0)
is susceptible to Fusarium oxysporum forma specialis (f.) matthioli whereas Columbia-0 (Col-0) is resistant.
Segregation analysis of a cross between Ty-0 and Col-0 revealed six dominant RESISTANCE TO FUSARIUM
OXYSPORUM (RFO) loci that significantly contribute to f. matthioli resistance in Col-0 relative to Ty-0. We
refer to the locus with the strongest effect as RFO1. Ty-0 plants in which only the Col-0 allele of RFO1 (RFO1Col-0
)
was introduced were resistant to f. matthioli. Surprisingly, RFO1Col-0
also conferred resistance to f. raphani,
demonstrating that RFO1-mediated resistance is not race specific. Expression of resistance by RFO2, RFO4,
or RFO6 was dependent on RFO1Col-0

  

Source: Ausubel, Frederick M. - Department of Genetics, Harvard University

 

Collections: Biology and Medicine