Brassica genome sizes
Even with large-scale assembled genomes, there is considerable uncertainty surrounding the accurate estimation of genome size. This in part is due to the under-representation of extensive arrays of repeated sequence associated with rDNA/rRNA (NORs) and poorly characterised centromeres. Thus the size of the various Brassica species genomes can only be estimated. There are several convetional established methods of estimation, including Feulgen microdensity measurements and flow cytometry. The values quoted are the haploid genome (1C) equivalents in Mbp. For information on the genome composition and U's triangle see here 
| Species | MBp | Source | Method | Reference |
|---|---|---|---|---|
| B. rapa (A) | 468 - 516 | Flow cytometry | 1 | |
| 507 | var. chinensis Pak choi | 1 | ||
| 511 | var. rapifera turnip | 1 | ||
| 529 | 5 | |||
| 564 | 4 | |||
| 784 | 3 | |||
| B. nigra (B) | 468 | black mustard | flow cytometry | 1 |
| 632 | flow cytometry | 5 | ||
| 760 | feulgen | 2 | ||
| B. oleracea (C) | 599 - 618 | var. italica broccoli | flow cytometry | 1 |
| 603 | var capitata cabbage | flow cytometry | 1 | |
| 628 | var gemmifera Brussels sprout | flow cytometry | 1 | |
| 628 - 662 | var botrytis cauliflower | flow cytometry | 1 | |
| 696 | flow cytometry | 5 | ||
| 752 | feulgen | 4 | ||
| 868 | feulgen | 2 | ||
| B. juncea | 1068 | brown mustard | flow cytometry | 5 |
| 1105 | flow cytometry | 1 | ||
| 1495 | feulgen | 2 | ||
| B. napus | 1129-1235 | rapeseed | flow cytometry | 1 |
| 1127 | feulgen | x | ||
| 1132 | flow cytometry | 5 | ||
| B. carinata (BC) | 1284 | Ethiopian mustard | flow cytometry | 5 |
| 1544 | feulgen | 2 |
is maintained at the Royal Botanic Gardens Kew by Bennett and Leitch and has all the appropriate bibliography etc. (1991) at the National Agricultural Library, USDA 