2. A first year inbred ear of Cuban Yellow Flint segregated sharply red and green seedlings and a range of intensity of yellow endosperm. The seeds were arranged in order of endosperm color and the darker 3/4 planted separately from the lighter 1/4. On this classification crossovers with anthocyanin were about 20%. The stock was grown through two more generations with selection of ears giving lesser crossing over and the crossovers reduced to about 10%. The reduction was attributed to selection for sharper segregation and more accurate classification of endosperm color. The anthocyanin difference was indicated at the R locus by outcrosses to Cornell aleurone testers.