RESISTANCE TO XANTHOMONAS CAMPESTRIS PV. CAMPESTRIS IN BRASSICA SPP.

Six races of Xanthomonas campestris pv. campestris have been identified on the basis of their reactions on a series of differential Brassica genotypes.
Races 1 and 4 are the most important races worldwide.
Searches for resistance in a collection of Brassica oleracea (C genome) were mainly unsuccessful, but partial or total resistance to races 2, 3, 5 and 6, which are rare races, was present in a number of accessions.
Strong resistance to race 4 was widespread in B. rapa (A genome) and B. napus (AC genome) indicating an A genome origin.
Resistance to races 1, 3 and 4 was found in B. nigra (B genome), B. carinata (BC genome) and B. juncea (AB genome) suggesting a B genome origin.
Potential race non-specific resistance was also found in these three species and in B. rapa.
Resistance to races 1 and 3 is quantitative and recessive in the cabbage line Badger Inbred-16, while resistance to race 3 is controlled by a single dominant locus in several B. oleracea lines.
Resistance to race 4 is controlled by a single dominant locus in B. napus and probably in B. rapa. Resistance to races 1, 3 and 4 appears to be dominant in B. nigra and B. carinata.

III International Symposium on Brassicas and XII Crucifer Genetics Workshop

J.G. Vicente, J. Conway, G.J. King, J.D. Taylor

Black rot of crucifers, disease resistance, inheritance, gene-for-gene, oilseed rape, mustard

https://doi.org/10.17660/ActaHortic.2000.539.6