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Genetic differentiation of Rosa canina (L.) at regional and continental scales

A. H. Jürgens, B. Seitz and I. Kowarik
Plant Systematics and Evolution
Vol. 269, No. 1/2 (November 2007), pp. 39-53
Published by: Springer
Stable URL: http://www.jstor.org/stable/23655910
Page Count: 15
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Genetic differentiation of Rosa canina (L.) at regional and continental scales
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Abstract

We investigated the genetic differentiation of Rosa canina at regional and continental scales to delineate provenance regions for seed collection. Using RAPD technique, we examined eight populations in Brandenburg (Germany) and 13 samples from Bavaria and Hungary. AMOVA and ϕ-statistics revealed a significant differentiation (ϕRT = 0.23, P < 0.0001) between accessions from Brandenburg and the two other regions. The interpopulation differentiation in Brandenburg was low (ϕPT = 0.13). We found the greatest interpopulation distance between Hungary and Brandenburg (Hoher Fläming, ϕPT = 0.47) and the lowest between Dahmeland and Hoher Fläming (both Brandenburg, ϕPT = 0.01). UPGMA dendrogram and PCA showed a clear disjunction between Brandenburg and other regions. Due to the out-crossing mating and seed dispersal system, the genetic variation within R. canina populations is moderately high (87% for Brandenburg, 76% for Bavaria and Hungary). The significant genetic differentiation at the continental scale suggests lower gene flow with increasing geographical distance and underlines the usefulness of regional provenances for planting.

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