01949naa a2200157 a 450000100080000000500110000800800410001910000130006024501380007326000090021152014750022065000100169565300140170570000190171977300530173818388512013-02-19       1991    bl ---       0--  u    #d1 aSAUR, L.  aRecherche de géniteurs de résistance à la fusariose de l'épi causée par Fusarium culmorum chez le blé et les espèces voisines.  c1991  aSources of resistance to head blight caused by Fusarium culmorum in bread wheat and related species. Over a 10-yr period, a total of 230 wheat genotypes and 334 lines from 15 Triticineae species were evaluated for their resistance to head blight caused by Fusarium culmorum. Plants were inoculated in the field by spraying a spore suspension at the anthesis of each genotype. The percentage of infected spikelets was evaluated visually 20 d after contamination and the effect of the disease on thousand grain weight was measured by comparing inoculated and uninoculated plots. The same 4 varieties were used as control every year. The good difference between the susceptible and the resistant controls (fig 1), provided a scale to compare genotypes even if they were not tested during the same years. A wide genetic variation was found in winter wheat, from very susceptible to partially resistant genotypes (table I). The resistance level needed for winter wheat cultivation in the temperate climate of northern France is discussed according to the evaluation of the loss of grain yield due to the disease (table II). Exotic spring wheat varieties reported for their tolerance to Fusarium graminearum were also tolerant to F culmorum under our environmental conditions (table III). Related species did not display a very high level of resistance (table IV). Only the frequency of resistant genotypes is higher in the species Triticum monococcum and Aegilops speltoides.  awheat  aTriticeae1 aMORLAIS, J. Y.  tAgronomie, Parisgv. 11, n. 7, p. 535-541, 1991.