POLYMORPHISM OF 2 WAXY PROTEINS IN THE EMMER GROUP OF TETRAPLOID WHEAT, TRITICUM-DICOCCOIDES, T-DICOCCUM, AND T-DURUM

Gel-electrophoretic analyses detected polymorphism of two waxy (Wx) proteins, Wx-A1 and Wx-B1, in 334 accessions of the emmer group of tetraploid wheat, Triticum dicoccoides, T. dicoccum and T. durum. The null allele for the Wx-A1 protein (Wx-A1b) was found in one accession of T. dicoccoides and seven of T. dicoccum, but it was not present in those T. durum accessions analysed. The null allele for the Wx-B1 protein (Wx-B1b) did not occur in three emmer-wheat species. Wx-A1 and Wx-B1 proteins showing alteration in mobility in SDS-PAGE gel or in isoelectric points were found in five accessions and considered to be the products of new alleles, Wx-A1d, Wx-A1e and/or Wx-B1d Densitometric analysis of Wx protein bands revealed that Wx-A1 was present in smaller amounts than Wx-B1 in almost all accessions.