Polymorphism of two waxy proteins in the emmer group of tetraploid wheat, Triticum dicoccoides, T. dicoccum, and T. durum

Abstract

AbstractGel‐electrophoretic analyses detected polymorphism of two waxy (Wx) proteins, Wx‐Al and Wx‐Bl, in 334 accessions of the emmer group of tetraploid wheat, Triticum dicoccoides, T. dicoccum and T. durum. The null allele for the Wx‐Al protein (Wx‐Alb) 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‐Bl protein (Wx‐Blb) did not occur in three emmer‐wheat species. Wx‐Al and Wx‐Bl 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‐Ald, Wx‐Ale and/or Wx‐Bld. Densitometric analysis of Wx protein bands revealed that Wx‐Al was present in smaller amounts than Wx‐B1 in almost all accessions.