Journal article

One gene-one name: the AvrLmJ1 avirulence gene of Leptosphaeria maculans is AvrLm5

Clemence Plissonneau, Thierry Rouxel, Anne-Marie Chevre, Angela P Van De Wouw, Marie-Helene Balesdent



Leptosphaeria maculans, the causal agent of blackleg disease, interacts with Brassica napus (oilseed rape, canola) and other Brassica hosts in a gene-for-gene manner. The avirulence gene AvrLmJ1 has been cloned previously and shown to interact with an unidentified Brassica juncea resistance gene. In this study, we show that the AvrLmJ1 gene maps to the same position as the AvrLm5 locus. Furthermore, isolates complemented with the AvrLmJ1 locus confer avirulence towards B. juncea genotypes harbouring Rlm5. These findings demonstrate that AvrLmJ1 is AvrLm5 and highlight the need for shared resources to characterize accurately avirulence and/or resistance genes.

University of Melbourne Researchers


Awarded by French National Research Agency project AvirLep

Funding Acknowledgements

This research was funded by the French National Research Agency project AvirLep (ANR GPLA07-024C) and the Grains Research and Development Corporation.