Variation in DNA‐ploidy Levels of Reynoutria Taxa in the Czech Republic

Variation in DNA‐ploidy Levels of Reynoutria Taxa in the Czech Republic

The genus Reynoutria is represented by four taxa in the Czech Republic: Reynoutria japonica var. japonica, R. japonica var. compacta, R. sachalinensis and R. ×bohemica. By using flow cytometry, cytological variability within the genus is described based on 257 Reynoutria samples. The varieties of R....

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Bibliographic Details
Published in:Annals of botany 2003-08, Vol.92 (2), p.265-272
Main Authors: MANDÁK, BOHUMIL, PYŠEK, PETR, LYSÁK, MARTIN, SUDA, JAN, KRAHULCOVÁ, ANNA, BÍMOVÁ, KATEŘINA
Format: Article
Language:eng
Subjects:
Biological taxonomies
Chromosomes, Plant - genetics
Czech Republic
DNA, Plant - analysis
Ecological genetics
Ecological invasion
Environment
Fallopia
flow cytometry
Genetic Variation
Hexaploidy
Hybridity
hybridization
invasion
Karyotyping
Key words: Clonality
Original
Plants
Ploidies
Polygonaceae
Polygonaceae - genetics
Polyploidy
R. japonica var. compacta
R. sachalinensis
R. ×bohemica
Reynoutria japonica var. japonica
Taxa
Tetraploidy
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Summary:The genus Reynoutria is represented by four taxa in the Czech Republic: Reynoutria japonica var. japonica, R. japonica var. compacta, R. sachalinensis and R. ×bohemica. 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. ×bohemica 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. ×bohemica 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.
ISSN:0305-7364
1095-8290