Abstract
The waxy proteins from a number of genetic backgrounds of wheat and its progenitors were analyzed by SDS-PAGE. The deduced amino acid sequences of the waxy proteins of three diploid progenitor species indicated several key amino acid substitutions, which could explain the differences observed in the electrophoretic mobilities of the wheat waxy proteins. A slight difference observed in the apparent molecular weight of the WX-A1 protein of diploid and polyploid wheat was explained by amino acid substitutions or variations in predicted protein structures. Further, twelve different partial genomic clones, representing the individual waxy loci of the various diploid, tetraploid and hexaploid wheats, were isolated and compared. The results indicated significant variations in intron 4 and led to identification of sequences unique to the individual waxy genes and genomes of wheat and its proposed progenitors. The sequence variations observed have a great potential for development as molecular markers for identification of specific waxy loci and study of the various waxy mutants of wheat.
Published Version
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