1. Linkage data on Chrom. 3:
| Genes | Phase | XY | Xy | xY | xy | Total | % recomb. |
| G2-D1 | RS | 241 | 89 | 85 | 13 | 428 | 38 |
| Rg-Ra2 | CB | 61 | 18 | 41 | 77 | 197 | 30 |
Severe drought injury made accurate classification of cr and g2 impossible. The g2-d1 results, however, indicate that g2 may be in chrom. 3.
| Genes | % recombination | ||
| A-Lg2 | 39 | ||
| a1 lg2 + | ⊗ | A-Ra2 | 45 |
| + + ra2 | Lg2-Ra2 | 54 | |
The data of these two tables (together with earlier findings) indicate that the ra2 locus is in the neighborhood of d1, probably between d1 and cr.
R. A. Brink