Table 4 . FISH studies of chromosome pairing in synthetic allotetraploids.
| Chromosome associations (ranges) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| I | II | III | IV | ||||||||||||
| Allotetraploids | 2n | Total | IA | IB | IC | Total | IIA-A | IIB-B | IIC-C | IIA-C | Total | Total | A-A-A-A | Others | Total PMCs |
| AA.BB | 36 | — | — | — | — | 17.74 (16–18) | 9.80a (8–10) | 7.94a (7–8) | — | — | — | 0.13 (0–1) | 0.07a (0–1) | A-A-B-B 0.06 (0–1) | 69 |
| AA.CC | 38 | 0.52 (0–10) | 0.35a (0–6) | — | 0.17a (0–4) | 18.22 (14–19) | 9.52b (6–10) | — | 8.61b (6–9) | 0.09 (0–2) | — | 0.26 (0–2) | — | A-A-C-C 0.26b (0–2) | 23 |
| CC.AA | 38 | 0.11 (0–8) | 0.08b (0–6) | — | 0.03b (0–2) | 18.41 (12–19) | 9.66a, b (5–10) | — | 8.75b (7–9) | — | 0.03 (0–2) | 0.25 (0–2) | 0.03b (0–1) | A-A-C-C 0.22b (0–2) | 73 |
| BB.CC | 34 | 0.67 (0–4) | — | 0.46 (0–4) | 0.21a (0–2) | 16.62 (15–17) | — | 7.74b (6–8) | 8.87b (8–9) | — | — | 0.03 (0–1) | — | B-B-C-C 0.03 (0–1) | 39 |
I, univalent; II, bivalent; III, trivalent; IV, quadrivalent. IA, IB, and IC indicate univalents belonging to the A, B, and C genomes, respectively; IIA-A, IIB-B, and IIC-C indicate homologous bivalents formed between a pair of A or a pair of B or a pair of C chromosomes, respectively.
a,b
Groups significantly different by χ2 -test, p < 0.05.