捷克共和国虎杖类群DNA倍性水平的变异
Variation in DNA-ploidy Levels of Reynoutria Taxa in the Czech Republic.
作者信息
Mandak Bohumil, Pysek Petr, Lysak Martin, Suda Jan, Krahulcova Anna, Bimova Katerina
机构信息
Institute of Botany, Academy of Sciences of the Czech Republic, CZ-252 43 Průhonice, Czech Republic.
出版信息
Ann Bot. 2003 Aug;92(2):265-72. doi: 10.1093/aob/mcg141.
The genus Reynoutria is represented by four taxa in the Czech Republic: Reynoutria japonica var. japonica, R. japonica var. compacta, R. sachalinensis and R. xbohemica. By using flow cytometry, cytological variability within the genus is described based on 257 Reynoutria samples. The varieties of R. japonica are cytologically uniform, var. japonica is exclusively octoploid (2n = 8x = 88) and var. compacta occurs only as a tetraploid (2n = 4x = 44), but R. sachalinensis and R. xbohemica exhibit some variation in chromosome numbers. Reynoutria sachalinensis is predominantly tetraploid (2n = 4 x = 44), but also occurs occasionally as hexaploid and octoploid cytotypes. The most common ploidy level in R. xbohemica is hexaploid (2n = 6x = 66), but tetraploid and octoploid clones were also found. The four taxa occurring in the Czech Republic are described briefly and the possible origins of the cytotypes discussed.
在捷克共和国，蓼属（Reynoutria）有四个分类群：日本虎杖原变种（Reynoutria japonica var. japonica）、日本虎杖紧凑变种（R. japonica var. compacta）、库页岛虎杖（R. sachalinensis）和捷克蓼（R. xbohemica）。通过流式细胞术，基于257份蓼属样本描述了该属内的细胞学变异。日本虎杖的变种在细胞学上是一致的，原变种均为八倍体（2n = 8x = 88），紧凑变种仅为四倍体（2n = 4x = 44），但库页岛虎杖和捷克蓼的染色体数目存在一些变异。库页岛虎杖主要是四倍体（2n = 4x = 44），但偶尔也会出现六倍体和八倍体细胞型。捷克蓼最常见的倍性水平是六倍体（2n = 6x = 66），但也发现了四倍体和八倍体克隆。简要描述了捷克共和国出现的这四个分类群，并讨论了细胞型的可能起源。
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