The main objective of the present study was to identify chromosome number variation in the progenies from triploid × diploid/tetraploid (3x × 2x/4x) crosses in Lilium to analyze the survival of aneuploid embryos from 3x × 2x/4x crosses and the potential significance of triploid for lily breeding. Two male-sterile autotriploid Asiatic lily cultivars were crossed with four diploid and/or two autotetraploid Asiatic cultivars. The results showed that the fruits of all triploid × diploid/tetraploid (3 x × 2 x /4 x ) crosses fully developed, and seedlings were obtained from the 3 x × 2 x /4 x crosses, indicating that male-sterile autotriploid lilies can be used as female parents. Chromosome preparation showed that the progenies of the 3 x × 2 x /4 x are predominantly aneuploid. Based on megasporogenesis, we deduce that the endosperm of 3 x × 2 x is 7 x and that of 3 x × 4 x is 8 x in Lilium and conclude that the aneuploid embryo survival of 3 x × 2 x /4 x in Lilium is the result of the euploid endosperm. Lily is usually propagated by scaling or tissue culture; therefore, aneuploids obtained from triploid × diploid/tetraploid lilies would be a good source for cultivar breeding.
No takes yet. Share an insight, caveat, or question.
Zhou et al. (2011) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: