Limited genome size variation in Sesleria albicans
2000
Lysak, M.A. | Rostkova, A. | Dixon, J.M. | Rossi, G. | Dolezel, J.
The extent and significance of intraspecific genome size variation in plants continues to be a matter of discussion: in some species considerable variation has been described, while no variation has been detected in other taxa. In the present study, intraspecific genome size variation was analysed in a perennial grass Sesleria albicans Kit. ex Schult. (Poaceae). Flow cytometry was used for the analysis of nuclear DNA content in ten geographically isolated populations ofS. albicans . Despite long-term isolation and lack of gene-flow between the populations, only negligible inter-population differences were found. Although the differences between the populations were statistically significant, the maximum inter-population difference reached only 1.6% of the mean 2C value (9.78 ± 0.04 pg). The variation was not correlated with geographical location or with altitude of the populations analysed. The present study clearly demonstrates that S. albicans belongs to the plant taxa with a highly stable genome size.
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