Intergeneric Hybridization between Iris dichotoma, Pall. and Belamcanda chinensis, Leman

抄録

The 2 species I. dichotoma and B. chinensis were vegetatively and karyotypically very similar and they hybridized not only to give vigorous, F₁ and F₂ hybrids, but hybrids where some of the chromosomes showed homology and where the gametes were functional.
The relatively high basic chromosome number of I. dichotoma and B. chinensis (n=16) and the regular bivalent meiosis suggest that they could represent allo-polyploids of species with n=8, a number which characterises some species in the genus Iris.
The extensive and complete pairing in some cells in the F₁ hybrid I. dichotoma×B. chinensis (assuming all the observed pairing was allosyndetic) suggests that the genomes of the species show considerable homology, so that it is possible that the parental species had a common origin.
The observed affinity between I. dichotoma and B. chinensis suggests that some taxonomic revision of I. dichotoma is desirable.