Eranthis tanhoensis

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 tanhoensis

Notes.

In all eight studied populations of E. tanhoensis , Siberian endemic species, the somatic and basic chromosome numbers are 2 n = 14 and x = 7, respectively (Table 1 ; Fig. 2D-E ). Five pairs of chromosomes (I-V) are metacentric, two pairs (VI-VII) are submetacentric (Tables 2 and 3 ; Fig. 3 ). A pair of metacentric chromosomes (II) exhibited a secondary constriction. We found small B chromosomes in plants from two populations (pops 10 and 13). The maximum number of Bs in root tip cells appeared to be 8. They were represented by small metacentric and dot-shaped chromosomes, which are obviously telocentric. The karyotype formula of E. tanhoensis is 2 n = 2 x = 14 = 8m + 2msat + 4sm + 0-8B. Here, we present the results of the karyomorphological analysis of E. tanhoensis from the "Tanhoi Village" population (pop. 12).

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.