Comparative study of tests for flour quality evaluation in the breeding of1BL/1RS translocation wheats

The correct evaluation of the breadmaking quality of 1BL/1RS wheat-rye tran slocation lines in breeding programs requires the use of tests which are mo st suitable to the peculiarities of these materials. The SDS-sedimentation test, the Pelshenke index, the 10-gram mixograph and the Chopin microalveog raph have been jointly used in four sets of F3-F4 lines, descending from cr osses between wheat cultivars with and without the 1BL/1RS translocation. T he parameter measured by the mixogram which was most positively related to dough strength was height 3 minutes after reaching the peak (H3). The value s of H3 were relatively independent from quality parameters slightly influe nced by the presence-absence of the translocation such as optimum mixing ti me and tolerance range. The predictive value of the flour quality of the Pe lshenke index and SDS-sedimentation volume varied according to the genetic background. The use of the Pelshenke test in selection processes results in a lower loss of potentially good-quality genotypes. The relative independe nce of the values obtained in the two tests regarding protein content, reco mmends the use of both tests together as selection indices in early generat ions of 1BL/1RS materials.