Cumulative and interaction effects of prolamin allelic variation and of 1BL/1RS translocation on flour quality in bread wheat

The allelic variation of prolamin loci was studied in three F-2 progenies f rom three crosses between the 1BL/1RS cultivar Triana and Yecora Rojo, Pavo n and Florence Aurora, cultivars without the translocation. According to th e 1:2:1 theoretical proportions observed in the allelic variants of the Glu -B3/Gli-B1 loci of the parent without the translocation, the inheritance as a block of the rye chromosome arm was confirmed. A group of F-3-F-4 recomb inant lines, developed from these crosses was evaluated using the SDS-sedim entation test and the mixograph and alveograph tests. The presence of the 1 BL/1RS translocation was not associated with significantly lower grain prot ein content values or with the optimum mixing time in the mixograph of the genotypes. The effect of the 1BL/1RS translocation on most of the quality p arameters was highly dependent on the genetic pool. Significant increases i n gluten strength and better mixing properties associated with the presence of some alleles of the Glu-A1, Glu-A3/Gli-A1 and Gli-D2 loci were detected . The additivity and the interaction of prolamin gene effects with the rye translocation in the 1BL/1RS lines and its possible use in plant breeding a re discussed.