Abstract
The interactions of prolamin subunits encoded by the genomes of wheat (gliadins, glutenins) and rye (secalins) in hexaploid and octaploid Triticales were studied by electrophoresis of fractions extracted sequentially from ground grain and of fractions prepared by gel filtration chromatography of isolated glutens. The electrophoretic studies indicated that the two groups of polymeric secalins (the high-molecular-weight (HMW) secalins and 75K γ-secalins) and wheat glutenin subunits form at least some mixed polymers and oligomers that have solubility properties intermediate between those formed by the same subunits in the parental lines of wheat and rye. The gel filtration studies showed that the 75K γ-secalins are mainly present in lowmolecular-weight (LMW) polymers, but there were no major differences between the elution profiles of the glutens from Triticales and the parental wheat lines. It is concluded that attempts to increase the protein content of wheat by the transfer of genes for 75K γ-secalins from chromosome 2R of rye might have deleterious effects on breadmaking and other technological properties.
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