3. Linkage studies with brown midrib₄.

No evidence of linkage of bm₄ was obtained with the factors lg₁ – gl₂ – B – v₄ ‑ fl in group 2, ts₄ - na in group 3, pr in group 5, ms₁ ‑ su₂ in group 6, ra₁ – gl₁ in group 7, v₁₆ – j₁ in group 8, Wc ‑ sh ‑ wx in group 9, and g₁ in group 10. Factors in groups 1 and 4 have not been tested.

Robert E. Bothun