 Wheat may specifically induce WDEIA and certain chronic urticaria because the anti-gliadin IgE detects ω5-gliadins expressed by most of the Gli-B1 alleles, but prolamins extracted from rye or wheat/rye translocates invoke almost no responses.The Gli-B1 gene in wheat, "Triticum aestivum", comes from the progenitor species "Aegilops speltoides".This indicates that nascent mutations on the B genome of wheat are from a small number of cultivated Triticeae species.