3. New data.
- The factor o2 has shown linkage with ramosa (C.O. 18 per cent on the basis of F2 data). Backcross data will be available next year.
- Backcross data have shown that both lo and sp are on the Ts5 side of su. They may be allelomorphic.
- Backcross data of material sent by Dr. Emerson indicate that wl is between Ts5 and su. The order probably is Ts5-wl-su-Tu.