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RAPD variation among and within small and large populations of the rare clonal plant ranunculus reptans (ranunculaceae)

RAPD variation among and within small and large populations of the rare clonal plant ranunculus reptans (ranunculaceae)

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FISCHER, Markus, René HUSI, Daniel PRATI, Markus PEINTINGER, Mark VAN KLEUNEN, Bernhard SCHMID, 2000. RAPD variation among and within small and large populations of the rare clonal plant ranunculus reptans (ranunculaceae). In: American Journal of Botany. 87(8), pp. 1128-1137. ISSN 0002-9122. Available under: doi: 10.2307/2656649

@article{Fischer2000varia-12427, title={RAPD variation among and within small and large populations of the rare clonal plant ranunculus reptans (ranunculaceae)}, year={2000}, doi={10.2307/2656649}, number={8}, volume={87}, issn={0002-9122}, journal={American Journal of Botany}, pages={1128--1137}, author={Fischer, Markus and Husi, René and Prati, Daniel and Peintinger, Markus and van Kleunen, Mark and Schmid, Bernhard} }

Schmid, Bernhard 2011-06-16T08:43:51Z van Kleunen, Mark In the pre-alpine region of Europe numbers and sizes of populations of the clonal lake shore plant Ranunculus reptans have declined because of the regulation of lake water levels. We investigated genetic variation among and within 17 populations of different size (cover 1–10 000 m2) in R. reptans with RAPD (random amplified polymorphic DNA) profiles. We sampled 127 rosettes in 14 populations at Lake Constance and three populations at or near Lake Como. There was significant genetic variation between plants from the two lake regions (5.9%, analysis of molecular variance [AMOVA], P < 0.001), among populations within lake regions (20.4%,P < 0.001), and within populations (73.7%, P < 0.001). Under the assumptions of Wright’s island model the variation among populations corresponds to a gene flow of Nem = 0.70. Within the 14 Lake Constance populations we detected significant genetic variation among subpopulations separated by only a few metres (4.0% of the within-population variation; P < 0.05). Molecular variance was 24% smaller in small populations covering < 100 m2 area than in larger ones (P < 0.03), indicating that samples from large populations were genetically more variable than samples representing comparable areas of smaller populations. We conclude that gene flow among populations is very limited and that genetic drift has caused reduced genetic variability of smaller populations. Conservation of genetic variability in R. reptans requires persistence of large and also of small populations (because of population differentiation), and it could be enhanced by increasing the size of small populations (to counter genetic drift). RAPD variation among and within small and large populations of the rare clonal plant ranunculus reptans (ranunculaceae) Husi, René Prati, Daniel First publ. in: American Journal of Botany 87 (2000), 8, pp. 1128–1137 2000 Husi, René Peintinger, Markus deposit-license Fischer, Markus 2011-06-16T08:43:51Z eng Fischer, Markus Peintinger, Markus Schmid, Bernhard van Kleunen, Mark Prati, Daniel

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