Table 2.
DNA ploidy of parents, hybrids, and backcross progeny
| Plants tested | DNA content (pg) determined by flow cytometry | Estimated DNA ploidy |
|---|---|---|
| Parents: | ||
| B. juncea | 2.24 | 3.95 |
| B. rapa | 1.08 | 1.93 |
| B. kaber | 1.10 | 1.98 |
| Hybrids: | ||
| B. juncea × B. kaber #1 | 1.60 | 2.96 |
| B. juncea × B. kaber #2 | 2.21 | 4.06 |
| B. juncea × B. kaber #3 | 2.18 | 3.86 |
| B. juncea × B. kaber #4 | 2.17 | 3.84 |
| B. juncea × B. kaber #5 | 2.17 | 3.84 |
| B. juncea × B. kaber #6 | 1.18 | 3.86 |
| Hybrids: | ||
| B. rapa × B. kaber #1 to # 32 | 1.04 to 1.12 | 1.83 to 1.97 |
| Backcrosses with B. juncea | ||
| Backcross 1: | ||
| BC1F1 #1 | 2.61 | 4.62 |
| BC1F1 #2 | 2.66 | 4.70 |
| BC1F1 #3 | 2.58 | 4.56 |
| Backcross 2: | ||
| BC2F1 #1 | 2.45 | 4.32 |
| BC2F1 #2 | 2.45 | 4.33 |
| BC2F1 #3 | 2.47 | 4.37 |
| BC2F1 #4 | 2.41 | 4.25 |
| BC2F1 #5 | 2.30 | 4.06 |
| BC2F1 #6 | 2.33 | 4.11 |
| BC2F1 #7 | 2.44 | 4.31 |
| BC2F1 #8 | 2.27 | 4.01 |
| BC2F1 #9 | 2.31 | 4.08 |
| BC2F1 #10 | 2.42 | 4.27 |