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Assessing Rosa persica genetic diversity using amplified fragment length polymorphisms analysis

Basaki, T., Mardi, M., Kermani, M. Jafarkhani, Pirseyedi, S.M., Ghaffari, M.R., Haghnazari, A., Shanjani, P. Salehi, Koobaz, P.
Scientia horticulturae 2009 v.120 no.4 pp. 538-543
Rosa, ornamental woody plants, genetic variation, amplified fragment length polymorphism, genetic markers, genetic polymorphism, loci, population genetics, gene flow, geographical variation, genetic variance, plant genetic resources, Iran
The genetic diversity among 128 Iranian Rosa persica (R. persica) accessions in the different populations was analyzed. Amplified fragment length polymorphisms (AFLP) technique was used to produce 171 polymorphic fragments. The number of polymorphic loci ranged from 101 to 147 and the polymorphism information content (PIC) varied from 0.289 to 0.073, with an average of 0.16. This shows extreme variability and genetic diversity among the studied R. persica populations. An indirect estimate of the number of migrants per generation (Nm=0.376) indicated that gene flow was relatively low among populations of the species. Cluster analysis using the UPGMA method grouped all accessions into six clusters. The results did not show relative agreement with the genotypes' region of origin. Based on an analysis of molecular variance, 48% of the genetic variation of R. persica was within population and 52% was among populations. The present analysis revealed that Iranian R. persica genotypes are highly variable and genetically distinct from their origins. The apparent unique nature of the R. persica genotypes revealed by our results supports the case for the implementation of more intense characterization and conservation strategies, and provides useful information to address breeding programmes and germplasm resource management in Rosa spp.