4. Chromosome 4. Most interchanges show little crossing-over with su1. Of those tested the following are furthest away:
| % recombination |
Number of B.C. plants |
|||
| T1-4a | 0 | with | Ts5 | 359 |
| T4-6b | 1.5 | " | " | 320 |
| T2-4d | 0.2 | " | Tu | 500 |
| Beyond gl3 | ||||
| T2-4b | 16.7 | " | " | 215 |
| T2-4b | 15.0 | " | gl3 | 79 |
| T4-9b | 22.0 | " | " | 556 |