In the future, bulked segregant analysis combined with next-generation sequencing of the pools should allow mapping of the csp22 responsive locus, which we refer to Csr1. Refinement of the map position of Csr1 will allow marker-based introgression of the locus into breeding lines and a test of whether it improves basal resistance to bacterial disease in the field. This evidence concerns the gene SCARA3 and bacterial infectious disease.