The effect of selection for high versus low kernel density and flint versus dent kernel type in a synthetic corn variety. Major Professor: Paul L. Crane. One of the important aims in world-wide work on corn improvement has been yield increase. Several plant characters have been studied and their relationship to yield determined. The effect of selection for kernel type is a topic on which little work has been done. This work tries to determine the effect of kernel type and kernel type selection on yield and other characters.