| dynamics of rhynchosporium secalis pathotypes in relation to barley cultivar resistance. | rhynchosporium secalis isolates e97-2 and h97-2, represented the major pathotypes in populations on barley in alberta, canada, but differed widely in their virulence. following greenhouse co-inoculation with the two pathotypes, e97-2, originally isolated from resistant cv. 'cdc earl', predominated over h97-2, isolated from the susceptible cv. 'harrington', from the first to the last of four infection cycles on both 'cdc earl' and 'harrington'. these results indicated that the host can rapidly in ... | 2003 | 15000249 |