Institute of Marine and Environmental Sciences, University of Szczecin, Adama Mickiewicza, Szczecin, Poland.
Institute of Biology, University of Szczecin, Wąska, Szczecin, Poland.
PLoS One. 2020 Feb 10;15(2):e0228353. doi: 10.1371/journal.pone.0228353. eCollection 2020.
Counting chromosomes is the first step towards a better understanding of the karyotype evolution and the role of chromosome evolution in species diversification within Carex; however, the chromosome count is not known yet for numerous sedges. In this paper chromosome counts were performed for 23 Carex taxa from Armenia, Austria, the Czech Republic, and Poland. Chromosome numbers were determined for the first time in three species (Carex cilicica, 2n = 54; C. phyllostachys, 2n = 56; C. randalpina, 2n = 78), two subspecies (C. muricata subsp. ashokae, 2n = 58; C. nigra subsp. transcaucasica, 2n = 84) and two hybrids (C. ×decolorans, 2n = 74; C. ×walasii, 2n = 108). Among the taxa whose number of chromosomes had been known before, the largest difference was found in C. hartmaniorum (here 2n = 52) and C. aterrima subsp. medwedewii (here 2n = 52). A difference in the chromosome count was demonstrated for C. cilicica (2n = 54) versus the species of the section Aulocystis (2n = 30 to 40) and for C. tomentosa (2n = 48) versus the species of the section Acrocystis (2n = 18 to 38). The results of this study indicate that the position of C. cilicica in Aulocystis section may raise doubts. Attention was paid to the relationship between C. phyllostachys and taxa of the subgenus Carex section Gynobasidae.
计数染色体是更好地了解核型进化以及染色体进化在 Carex 物种多样化中的作用的第一步；然而，许多莎草科植物的染色体数仍然未知。本文对来自亚美尼亚、奥地利、捷克共和国和波兰的 23 种 Carex 分类群进行了染色体计数。首次在三个物种（C. cilicica，2n = 54；C. phyllostachys，2n = 56；C. randalpina，2n = 78）、两个亚种（C. muricata subsp. ashokae，2n = 58；C. nigra subsp. transcaucasica，2n = 84）和两个杂种（C. ×decolorans，2n = 74；C. ×walasii，2n = 108）中确定了染色体数。在以前已知染色体数的分类群中，最大的差异出现在 C. hartmaniorum（这里为 2n = 52）和 C. aterrima subsp. medwedewii（这里为 2n = 52）中。C. cilicica（2n = 54）与 Aulocystis 节的物种以及 C. tomentosa（2n = 48）与 Acrocystis 节的物种之间的染色体计数差异得到了证明（2n = 18 至 38）。本研究的结果表明，C. cilicica 在 Aulocystis 节中的位置可能值得怀疑。关注了 C. phyllostachys 与亚属 Carex 节 Gymnobasidae 分类群之间的关系。
