Genetic differentiation of Rosa rubiginosa L. in two different Argentinean ecoregions

We analyzed genetic differentiation of Rosa rubiginosa by RAPD from populations growing in two Argentinean ecoregions, Chaco Serrano and Patagonian Steppe. Leaf material was collected during the spring and summer of 2006. UPGMA dendrogram and PCoA clearly suggest a geographical differentiation of th...

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Bibliographic Details
Published in:Plant systematics and evolution 2009-08, Vol.281 (1-4), p.183-192
Main Authors: Aguirre, Gerardo U, Ciuffo, Gladys M, Ciuffo, Liliana E. C
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Differentiation
DNA
Ecoregions
Evolutionary genetics
Genetic analysis
Genetic diversity
Genetic variation
Introduced plants
Invasive species
Invasiveness
Life Sciences
Niches
Original Article
Plant Anatomy/Development
Plant Ecology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Plants
Population genetics
Populations
Steppes
Sustainable agriculture
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Summary:We analyzed genetic differentiation of Rosa rubiginosa by RAPD from populations growing in two Argentinean ecoregions, Chaco Serrano and Patagonian Steppe. Leaf material was collected during the spring and summer of 2006. UPGMA dendrogram and PCoA clearly suggest a geographical differentiation of the provenances of R. rubiginosa populations. AMOVA analyses revealed high genetic variation within populations (71%) and low variation between populations (29%), in agreement with values estimated by the Shannon-Weaver index. Genetic differentiation between populations estimated by AMOVA was [Greek Phi symbol]PT = 0.29 (P < 0.001). Nei's Gst (0.2205) was lower for interpopulation variation. The low interpopulation value obtained suggests genetic homogeneity between the populations. The presence of specific monomorphic bands accounts for the genetic differentiation between populations. The high percentage of within-population genetic diversity suggests the introduction of genetic variation into both ecoregions. From the present results we can conclude that we observed two independently established populations with high similarity between them and a strong intrapopulation differentiation. The empty niche hypothesis for explainging invasion success might explain the invasiveness of R. rubiginosa in Argentinean ecoregions.
ISSN:0378-2697
1615-6110
2199-6881
DOI:10.1007/s00606-009-0200-x