Lg3 is not an allele of lg2. This has been shown by the presence of normal plants in backcross and F₂ from the cross lg2 × Lg3. The following three-point data indicate that Lg3 lies about two points to the left of Rg. (The linkage map for chromosome 3 should have cr at the left end and a at the right. The Linkage Summary was in error. R. A. E.)

H. S. Perry