Vinsamlegast notið þetta auðkenni þegar þið vitnið til verksins eða tengið í það: http://hdl.handle.net/1946/23439
The woodland strawberry, Fragaria vesca L., has the widest distribution of its genus. It
can be found across North-America, all over Europe and into Asia. F. vesca has become an
important research model benefitting from its small genome as well as both easy
propogation and maintainance. A vast collection and research on natural variation is
imperative to the advancement of research in the field of the Rosa (Rosaceae) plant family,
the third most economically important of all plant families. Another importat reason for
assessing the genetic population structure of the F. vesca is its vast distribution and the
effect of climate change through the ages, which could shed light on the dispersal route of
the species during and after the last glacial maximum.
The aims of this study were to collect individuals of F. vesca representing the entire
geographic distribution, assess their genetic diversity and to shed light on the origin of the
Icelandic F. vesca population.
In this study, a collection of 445 plants were gathered from all corners of the geographical
distribution. Of those, 300 plants were analysed using 66 of the 68 microsatellite markers
tested. Their mean allele number per locus was 3.94 and the mean polymorphic
information content value was 0.13. Ten markers were monomorphic and 13 biallelic.
The collection of plants was analysed using Beyasian clustering analysis software BAPS
and STRUCTURE. The two methods resulted in contrasting number of clusters for the data.
The only corresponding results were the great divergence between the American
population and the European. Also it was prominent in both methods that the Icelandic
population was a separate cluster in the European populations. The two genetic distance
methods used showed that the Icelandic population was closest genetically to the set of
cultivars used in this study. Furthermore, the results revealed no population structure in
Iceland suggesting recent dispersal and refuting any suggestions of glacial survival.