Eranthis pinnatifida

Mitrenina, Elizaveta Yu., Erst, Andrey S., Peruzzi, Lorenzo, Skaptsov, Mikhail V., Ikeda, Hiroshi, Nikulin, Vyacheslav Yu. & Wang, Wei, 2021, Karyotype and genome size variation in white-flowered Eranthis sect. Shibateranthis (Ranunculaceae), PhytoKeys 187, pp. 207-227 : 207

Eranthis pinnatifida

Notes.

The Japanese endemic E. pinnatifida , unlike other related species, has four rather than five pairs of metacentric chromosomes (I-IV) and four rather than three pairs of submetacentric (V-VII) and subtelocentric chromosomes (VIII). The karyotype formula of the plants from three studied populations (pops 19, 21 and 22) is 2 n = 2 x = 16 = 8m + 6sm + 2stsat. These plants have secondary constrictions and small satellites at terminal regions of short arms of the pair VIII (Table 2 ; Figs 2H and 3 ). Specimens from the fourth population (pop. 20) have a pair of heteromorphic chromosomes (VIII) represented by one metacentric and one subtelocentric chromosome (Fig. 2I ). The karyotype formula of these plants is 2 n = 2x = 16 = 8m + 1msat + 6sm + 1stsat. In these plants, the secondary constriction in the metacentric homologue to the VIII pair is located in the pericentromeric region. Here we present the results of the karyomorphological analysis of E. pinnatifida from the "Inabe-shi" population (pop. 21).

Figures

Figure 2. Mitotic metaphase plates of white-flowered Eranthis sect. Shibateranthis A E. lobulata, 2 n = 16 B E. stellata (pop. 2), 2 n = 16 C E. stellata (pop. 6), 2 n = 16 D E. tanhoensis (pop. 12), 2 n = 14 E E. tanhoensis (pop. 10), 2 n = 14 + 0 - 8 B (arrows point at B chromosomes) F E. sibirica (pop. 15), 2 n = 42 G E. byunsanensis, 2 n = 16 (arrows point at the heteromorphic chromosome pair) H E. pinnatifida (pop. 21), 2 n = 16 I E. pinnatifida (pop. 20), 2 n = 16 (arrows point at heteromorphic chromosome pair). Scale bars: 10 μm. Microphotographs by E. Yu. Mitrenina.

Figure 3. Haploid idiograms of white-flowered Eranthis sect. Shibateranthis species. I-VIII - chromosome pairs; m - metacentric chromosome; sm - submetacentric chromosome; st - subtelocentric chromosome; t - acrocentric chromosome; T - telocentric chromosome; B - B chromosome.