Cereal Chem 59:139 - 142.  |  VIEW ARTICLE
Minerals and Protein Contents in Hard Red Winter Wheat.

E. Dikeman, Y. Pomeranz, and F. S. Lai. Copyright 1982 by the American Association of Cereal Chemists, Inc. 

Twenty-five and 29 cultivars/selections of hard red winter wheat were grown at 23 locations in the Great Plains in 1973 and 1979, respectively. Equal weights of each of the 1973 cultivars/selections were composited for 10 locations and of the 1979 cultivars/selections for nine locations. In addition, equal weights of cultivars/selections from 23 locations were composited for 10 cultivars/selections for 1973 and nine cultivars/selections for 1979. The 38 composite samples were analyzed for ash, protein, P, K, Mg, Ca, Zn, Fe, Mn, and Cu. Ranges of all components were much wider for location composites (across cultivars/selections) than for cultivar/selection composites (across locations). Irrigation reduced total ash and K contents and increased Mn content. Large compositional differences were found in location composites for the two years. When components were expressed as percent of sample, eight correlation coefficients were statistically significant (in both years) for the cultivar/selection composites (ash with Zn and P; protein with P, Mg, and Zn; Zn with P and Mg; and Cu with P). Four were significant for the location composites (ash with P and Mg and protein with Ca and Mg). When mineral components were expressed as percent of ash, the significant correlations were Zn with protein, K with P, and Mn with Mg for the cultivar/selection composites and Ca with protein for the location composites. The only significant correlations irrespective of how mineral content was expressed were Zn with protein for the cultivar/selection composites and Ca with protein for the location composites.