Registration of Great Plains–Adapted Reduced Phytate Winter Wheat Germplasm

Reduced or low phytic acid (LPA) mutants of wheat (Triticum aestivum L.) increase the bioavailability and, subsequently, the gut absorption of minerals in monogastric animals, including humans. The USDA-ARS in cooperation with the University of Nebraska developed and released eight low phytate (LPA) winter wheat lines (N16MD9012 [Reg. No. GP-1024, PI 682715], N16MD9140 [Reg. No. GP-1025, PI 682717], N16MD9275 [Reg. No., GP-1026, PI 682718], N16MD9268 [Reg. No. GP-1027, PI 682719], N16MD9046 [Reg. No. GP-1028, PI 682720], N16MD9204 [Reg. No. GP-1029, PI 682722], N16MD9074 [Reg. No. GP-1030, PI 682723], and N16MD9153 [Reg. No. GP-1031, PI 682724]) adapted to the Great Plains of North America. The highest-yielding IPA line was not significantly different in grain yield from the adapted controls 'Anton' and 'Intrada', was significantly higher in grain yield than 'Big Sky' and 'Siouxland', but was significantly lower than the two highest-yielding controls, 'Freeman' and 'Ruth'. Overall, there were no significant differences in grain yield, grain volume weight, and grain protein concentration (GPC) between the LPA lines and the mean values of the adapted controls. On average, the LPA lines had 18% more zinc than the adapted controls. Six of the eight LPA lines contain the Lr37/Sr38/Yr17 genes combination, which provides resistance for leaf, stem, and yellow/stripe rust. Grain yield data obtained in diverse environments in Nebraska indicated no grain yield reduction associated with the low phytate trait.