On the Chromosomes of Lilium tigrinum, KER-GAWL

Meiosis in <i>Lilium</i>

“…1 d). This is in agreement with the observations of Takenaka and Nagamatsu (1930). The somatic chromosomes of (a) L. pyrenaicum early diplotene and metaphase was very low, and the reduction in the chiasma frequency very small.…”

Karyotype analysis of Lilium tigrinum by FISH

“…However, in this case it would be less likely due to none of tetraploid L. tigrinum having been found in the natural habitat so far. High frequency of trivalent pairing in the meiosis has been given as an evidence for autotriploidy by several researchers (Chandler et al, 1937;Takenaka and Nagamatsu, 1930). About 95% of over 11 trivalents were observed in triploid L. tigrinum (data not given).…”

“…Generally, diploids are fertile, whereas triploids are sterile due to their complex genome constitution. Sterility due to irregular movement of meiosis chromosomes caused the production of abortive male and female gametes (Takenaka and Nagamatsu, 1930).…”

On the Irregular Meiotic Division in the Pollen Mother-cell of Lilium tigrinum, KER-GAWL

“…On the previous investigation (TAKENAKA and NAGAMATSU, 1930) This table shows that the nuclear plate consisting of eleven trivalents, one bivalent and one univalent is the most. At the first anaphase, trivalents and bivalents are distributed unequally to the poles, while univalents are almost left on the equatorial plane at early first anaphase, but soon begin to come together in the centre of the spindle rising remarkable.…”

“…And at the somatic division of the root-tip, 6 larger chromosomes are clearlydivided into 2 groups (TAKENAKA and NAGAMATSU, 1930). At the heterotypic division of the pollen mother-cell in Lilium tigrinum,, all chromosomes form the trivalent with the exception of a few univalents of which individuality is not observed, namely which only fail to form the trivalent on various conditions.…”