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Quantitative Determination of Phytate and Inorganic Phosphorus for Maize Breeding

^a Dep. of Agronomy, Univ. of Wisconsin–Madison, Madison, WI 53706
^b USDA-ARS, Dep. of Agronomy, Iowa State Univ., Ames, IA 50011
^c Dep. of Agronomy, Iowa State Univ., Ames, IA 50011. This journal paper of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa, Project No. 3755, was supported by the Hatch Act and State of Iowa funds. Part of a dissertation submitted by A.J. Lorenz in partial fulfillment of the requirements for the M.S. degree

View larger version (9K): [in this window] [in a new window]   Figure 1. Relationship between phytate measurements obtained through the modified Wade assay and ion exchange (Ralston Analytical Laboratories, St. Louis, MO). Pearson's correlation coefficient between the two phytate measurements was 0.95.

View larger version (9K): [in this window] [in a new window]   Figure 2. Kernel weight (g per 250 kernels) versus phytate (g kg–1). Horizontal and vertical reference lines indicate the experiment means of each trait.