Table 1.
Seeds with ploidy shifts in the embryo according to flow cytometric seeds screening (for seeds without ploidy shifts see Schinkel et al. 2016)
| Ploidy | Endosperm ratio (maternal/paternal) | Reproduction mode | N | ||||
|---|---|---|---|---|---|---|---|
| Mother plant | Egg cell | Sperm nuclei | Embryo | Endosperm | |||
| Diploid | |||||||
| 2x | 2x | 1x | 3x | 5x | 4:1 | BIII | 3 |
| 2x | 2x | 2x | 4x | 6x | 2:1 | Biparental polyploidization | 1 |
| (Total 4) | |||||||
| Triploid | |||||||
| 3x | 1x | 1x | 2x | 3x | 2:1 | Irregular female meiosis | 2 |
| 3x | 3x | 1x | 4x | 7x | 6:1 | BIII | 2 |
| 3x | 3x | 1x | 4x | 9x a | 1:0b | BIII | 1 |
| 3x | 3x | 1x | 4x | 10x a | 9:1 | BIII | 1 |
| (Total 6) | |||||||
| Tetraploid | |||||||
| 4x | 2x | 0x | 2x | 6x | 2:1 | Polyhaploid | 12 |
| 4x | 2x | 1x | 3x | 5x | 4:1 | Irregular male meiosis | 2 |
| 4x | 2x | 1x | 3x | 6x a/d | 1:0b | ” | 1 |
| 4x | 2x | 1x | 3x | 7x a | 3:1 | ” | 4 |
| 4x | 3x c | 2x | 3x | 8x | 3:1 | Irregular female meiosis | 3 |
| 4x | 4x | 2x | 6x | 10x | 4:1 | BIII | 10 |
| 4x | 4x | 2x | 6x | 14x a | 6:1 | BIII | 1 |
| (Total 33) | |||||||
a Potential trinucleate endosperm or mitotic nondisjunction in one of both polar nuclei
b Autonomous endosperm
c Aneuploidy
d Fertilization by two sperm nuclei
N number of seeds