Selection for grain yield and quality in segregating generations of wheat

The objective of the work was to combine simultaneous selection for grain y ield and technological quality in elite segregating populations of wheat de veloped by the breeding program of IAPAR. Thirteen populations were chosen according to their potentiality of genetic variability in the F-2 generatio n of the 1997 crop season. One hundred heads were selected from each popula tion and sown as F-3 head-rows in the following season. Visual selection of individual head-rows or lines was done for yield potential and maturity. S eeds of the selected lines were evaluated for Sedimentation Values as well as Protein Content. The populations were identified as C1 to C13, represent ing the different crosses. The number of F-2:3 lines selected within popula tions varied from one to 12. The populations C6, C7, C9, and C13 were class ified as early maturity. Two populations (C6 and C9) presented higher poten tial for grain yield. The populations C12, C3, C8, and C1 were better for m ean and variance of sedimentation values. The populations C2, C3 and C11 ha d a good performance for mean, maximum values and variance of protein conte nt. The data indicates a good potential to obtain advanced lines with highe r grain yield associated with a better technological quality.