Table 1.
Meiotic abnormalities observed in pollen mother cells of the IACSP93-3046 variety.
| Meiotic phase | Number of cells examined | Number of cells with abnormalities∗ | Abnormalities |
|---|---|---|---|
| Metaphase I | 104 | 22 (21.2) | Chromosomes not lined up at the equatorial plate |
| Anaphase I | 39 | 28 (71.8) | Lagging chromosomes |
| 4 (10.2) | Rod bivalent laggings | ||
| 7 (17.9) | Chromosome bridges | ||
| Telophase I | 102 | 83 (81.4) | Lagging chromosomes |
| 5 (4.9) | Chromosome bridges | ||
| Prophase II | 114 | 99 (86.8) | Chromosomes outside the nucleus |
| Metaphase II | 100 | 57 (57.0) | Chromosomes migrating precociously to poles |
| 21 (21.0) | Chromosomes not aligned at the plate | ||
| Anaphase II | 11 | 8 (72.7) | Lagging chromosomes |
| Telophase II | 105 | 75 (71.4) | Laggards and chromosomes not included in the nuclei |
| Metaphase II/ Anaphase II | 9 | 9 (100) | Asynchrony |
| Tetrad | 116 | 63 (54.3) | Micronucleus |
| Total | 700 | 477 (68.1) |
∗Estimated percentage of cells with abnormalities shown in parentheses.