Karyotypes in Leucolirion and Archelirion

Chromosome morphology in Lilium. II

Abstract

1. Several species of Lilium belonging Leucolirion and Archelirion groups were studied and their karyotypes were examined.
Leucolirion
Lilium Brownii Brown 2n=24=2 (L₁+L₂+3M₁+2M₂+M₃^s+M₄+M₅^s+M₆+M₇)
L. japonicum Houtt. 2n=24=2 (L₁+L₂+3M₁+2M₂+M₃+M₄+M₅^s+M₆^s+M₇^t)
L. regale Wilson 2n=24=2 (L₁^s+L₂^s+3M₁+2M₂+M₃+M₄^s+M₅^s+M₆+M₇)
L. Makinoi Koidzumi
2n=24=2 (L₁^t+L₂+2M₁+M₁^s+2M₂+M₃^t+M₄+M₅^s+M₆+M₇)
2n=27=2 (L₁^t+L₂+2M₁+M₁^s+2M₂+M₃^t+M₄+M₅^s+M₆+M₇)+2f₁+f₂
L. Alexandrae Wallace 2n=24=2 (L₁+L₂^s+2M₁+M₁^s+2M₂+M₃^t+M₄+M₅+M₆+M₇) Archelirion
L. auratum Lindl. 2n=24=2 (L₁+L₂^ss+2M₁+M₁^s+2M₂+M₃+M₄+M₅+M₆+M₇)
2. In Lilium Makinoi, some individuals have no fragments in the root-tip cells, while others have two or three fragments.
3. The chromosome compliments of these species now studied are quite similar to each other, if we disregard the secondary constriction of each chromosome, but the karyotype of each species are clearly distinguished from each other by the different combinations of the SAT-chromosomes, as in the case of the species treated in our first paper.
4. On the view point of the karyotype, L. Makinoi, L. Alexandrae and L. auratum are closely related to each other, but there are no karyological evidences to support the opinion that L. Alexandrae may be a hybrid between L. Makinoi and L. auratum, as well as the opinion of Wallace that L. Brownii may be a hybrid between L. philippinense and L. Brownii var. colchesteri.