Abstract
The use of gliadins in cultivar identification is a well-known practice that is used in many countries. The aim of this study was to determine the gliadin banding patterns of 35 commercial South African wheat cultivars and to use these data to determine genetic relationships between the cultivars using sodium dodecyl sulphate-polyacrylamide gel electrophoresis. The index of genetic similarity was used to calculate pairwise distance matrices, which were converted to a dendogram. Most of the gliadin bands fell within the nomenclature used. Fourteen cultivars had one novel band and six had two novel bands. All the cultivars could be distinguished from one another. Genetic distances between clusters were small. This suggested that there was not enough unique genetic variability to set any cluster apart from the others.
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