9. Linkage of g4 and thin kernels. In a cross of Inbred II x g4 wx, three F2 ears segregated 25% thin kernels and the other four F2 ears were normal. Seed was taken from an ear segregating thin kernels, and the normal kernels planted separately from the thin ones. Theoretically, g4 should have segregated 3:1 in each group, All 14 plants obtained from the kernels of normal thickness were green, while the 10 plants from the thin kernels were g4. This behavior suggests that the gene (or small deficiency ?) for thin kernels is closely linked with g4.