S. Zhou
Unlike euploids which containing one or several whole chromosome sets, aneuploids can have chromosome numbers either greater or smaller than their euploids. Species of lilies are diploid (2n = 2x = 24). They are the source of modern lily cultivars. When you check chromosome numbers of commercial lily cultivars, you can also observe that many of them are triploid (2n = 3x = 36) or tetraploid (2n = 4x = 48). Numerous cases of lily hybridization show that it is not so difficult to obtain aneuploid lilies when you hybridize triploids with diploid/tetraploids, i.e., 3x × 2x/4x, though triploid lilies are usually male sterile. This is different from other polygonum-type plants in which 3x × 2x/4x crosses usually produce diploid or tetraploid. The reason for the difference is that endosperm of 3x × 2x/4x is euploid (7x/8x) in Lilium due to the Fritillaria-type embryo sac. The aneuploids could generate many variations in morphological and biological traits, and lily can be multiplied with tissue culture and scaling. Therefore, aneuploids can be a potential in lily breeding.
Zhou, S. (2014). ANEUPLOIDY IN LILY BREEDING. Acta Hortic. 1027, 149-154
DOI: 10.17660/ActaHortic.2014.1027.15
Lilium, aneuploid, interploid crosses, triploid, embryo, endosperm

Acta Horticulturae