Colchicine is used for inducing polyploidy in plant cells during cellular division by inhibiting chromosome segregation during meiosis; half the resulting gametes, therefore, contain no chromosomes, while the other half contain double the usual number of chromosomes (i.e., diploid instead of haploid, as gametes usually are), and lead to embryos with double the usual number of chromosomes (i.e., tetraploid instead of diploid). The use of Colchicine frequently results in plants that are larger, hardier, faster-growing, and in general more desirable than the normally diploid parents; for this reason, this type of genetic manipulation is frequently used in breeding plants commercially.
Paph. tonsum ('David' x tonsum alba 'Pistachio')
Paph. fairrieanum ('Hidden Mirror' x 'Red Mirror')