Starch yield and residual protein content in starch were determined us
ing a laboratory wet milling procedure for three waxy corn hybrids obt
ained from up to five planting locations, to investigate the effect of
planting location and hybrid on starch yield and purity, and to inves
tigate interactions between planting location and hybrid. Starch yield
varied significantly with both hybrid and planting location at the 5%
probability level. Residual protein content in starch was not signifi
cantly affected by planting location, but was significantly affected b
y hybrid. Relative rankings of hybrids with respect to starch yield an
d residual protein content in starch were consistent across planting l
ocations, although starch yield and the residual protein content in st
arch varied with the planting location. Results indicated that hybrids
having high starch yield at one location will likely have high starch
yields at other planting locations. The same was found true for starc
h purity.