Inheritance of Gliadin Proteins Associated with Quality in Durum Wheat¹

Abstract

The inheritance of gliadin protein differences was investigated because prior electrophoretic studies revealed a close relationship between certain endosperm proteins and gluten strength in durum wheat (Triticum turgidum L. var. durum). Particular attention was focused on gliadin band 45, as it is closely associated with dough strength, and on gliadin band 42, which is associated with poor viscoelastic properties. These inheritance studies were conducted on crosses between the two main biotypes of the Australian cv. Duramba. Results from F1, F2, and BC1F1, populations were consistent with the hypothesis that the syntheses of gliadin bands 45 and 42 are controlled by alleles at a single locus. Dosage effects were exhibited by both alleles; however, band 42 displayed a greater degree of dominance than did band 45. These results should prove useful in breeding durum wheat for improved pasta quality.

Polymorphism in seed endosperm proteins (gliadins and glutenins) of Turkish cultivated einkorn wheat [Triticum monococcumssp.monococcum] landraces

“…Genes controlling HMW-glutenin subunits are placed on the long arms of homeologous group 1 chromosomes at loci designated Glu-1 (Payne et al 1981). The genotypes can be identified directly by the band pattern of HMW-glutenin subunits (Jaradat 2001) because of codominant inheritance or equally dominant alleles encode for major protein subunits (Du Cros and Hare 1985).…”

Genetic control of some polymeric glutenin fractions in hexaploid wheat (Triticum aestivum)

“…Genetic studies have shown that the major storage protein fractions are coded for by codominant or equally dominant alleles (Damidaux et al 1980, Du Cros andHare 1985). Their expression involves a complex polygenic system (Shewry and Miflin 1984), which is also influenced by environmental conditions.…”