Abstract
Triticum urartu is a wild diploid wheat that has been identified as the donor of the A genome in polyploid wheats. The gliadins of this species were analysed by acid-PAGE in accessions from Armenia, Iran, Iraq, Lebanon, former-Soviet Union and Turkey. Up to twenty-six different alleles for each locus (Gli-Au1 and Gli-Au2) implicated in the synthesis of these proteins, were found. The genetic diversity was high, although a great part of this diversity is in danger of erosion given that the distribution of the combinations is not random. Consequently, loss of these accessions could mean loss of the allelic variants. These results provide new basic knowledge regarding the genetic variability of the seed storage proteins synthesised by the Au genome, as well as their potential to obtain novel germplasm for the improvement of wheat quality in breeding programmes.
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