Tetraploidization of hybrid "Raphanobrassica"
Artificial
hybridization of radish (Raphanus)
and cabbage (Brassica) (both 2N
= 18) produces a sterile first-generation
hybrid with one diploid chromosome set from either parent.
Tetraploidization
eventually produces a stable, true-breeding hybrid (Raphanobrassica).
Unfortunately, the hybrid combines the root of a cabbage with the
flower
head of a radish, rather than the desired edible reverse!