Wheat gluten proteins, in particular, undergo considerable structural change with hybridization. In one hybridization experiment, fourteen new gluten proteins were identified in the offspring that were not present in either parent wheat plant.6 Moreover, when compared to century-old strains of wheat, modern strains of Triticum aestivum express a higher quantity of genes for gluten proteins that are associated with celiac disease.7 Multiply these alterations by the tens of thousands of hybridizations to which wheat has been subjected and you have the potential for dramatic shifts in genetically
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