Eranthis lobulata

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 lobulata

Notes.

The somatic and basic chromosome numbers in E. lobulata , endemic to China, are 2 n = 16 and x = 8, respectively (Table 1 ; Fig. 2A ). Five pairs of chromosomes (I-V) are metacentric, and three pairs (VI-VIII) are submetacentric, subtelocentric and acrocentric (Tables 2 and 3 ; Fig. 3 ). A pair of submetacentric chromosomes exhibits a secondary constriction. We also found a single small B chromosome in some cells. These Bs are metacentric, about 2.5 μm long. The karyotype formula of E. lobulata is 2 n = 2 x = 16 = 10m + 2smsat + 2st + 2t + 0-1B.

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.