Table 3.
Associations of homoeologous chromosomes in metaphase I in various hybrids of wild-type wheat (WT) and ph1b and ph2b mutants with closely related plant species (Naranjo et al., 1987; Naranjo et al., 1988; Naranjo and Maestra, 1995; Maestra and Naranjo, 1997; Maestra and Naranjo, 1998).
| Hybrid | Chromosome number | Univalents | Rod bivalents | Ring bivalents | Multivalents | Chiasmata percell |
|---|---|---|---|---|---|---|
| WT × rye | 28 | 26.31 | 0.80 | 0.03 | 0.01 | 0.88 |
| ph2b × rye | 28 | 19.23 | 3.4 | 0.57 | 0.51 | 5.26 |
| ph1b × rye | 28 | 11.76 | 2.33 | 2.36 | 2.16 | 12.35 |
| WT × Ae. longissima | 28 | 24.55 | 1.59 | 0.06 | 0.05 | 1.81 |
| ph2b × Ae. longissima | 28 | 14.93 | 5.8 | 0.58 | 0.55 | 7.44 |
| ph1b × Ae. longissima | 28 | 3.48 | 4.4 | 2.99 | 2.86 | 18.28 |
| WT × Ae. sharonensis | 28 | 25.21 | 1.18 | 0.03 | 0.03 | 1.29 |
| ph2b × Ae. sharonensis | 28 | 10.16 | 5.58 | 1.42 | 1.13 | 11.17 |
| ph1b × Ae. sharonensis | 28 | 4.37 | 3.74 | 3.79 | 2.39 | 17.93 |
| WT × Ae. speltoides | 28 | 3.97 | 4.9 | 3.11 | 2.61 | 17.79 |
| ph2b × Ae. speltoides | 28 | 3.25 | 3.41 | 3.28 | 3.2 | 19.41 |
| ph1b × Ae. speltoides | 28 | 2.53 | 3.36 | 4.29 | 2.68 | 20.08 |