Abstract
The molecular genetic diversity of the broomrape (O. cumana) populations, parasitizing on sunflower in Russia, Romania and Kazakhstan, was studied with codominant microsatellite markers. By means of cluster analysis, the populations of broomrape were divided into two clusters, regardless of their racial composition. In the first cluster, 19 samples from Russia and Kazakhstan, representing one gene pool are grouped; the second cluster consisted of five populations from Romania, united in another pool. According to Nei, the genetic distance between the clusters was 0.137. The analysis of molecular variance revealed that 22% of total variance were caused by differences between the genetic pools and 78% appeared due to differences between the samples within the each gene pool. The pairwise comparisons performed by Wright’s statistics showed that the differences between these two gene pools are sufficient (Fst = 21.9%) in order to make the conclusion about the existence of small genetic differentiation between the pools. The descriptive population genetic statistics for each pool indicate that the broomrape populations from Russia and Kazakhstan are characterized by a higher level of intrapopulation diversity than the populations from Romania.
Published Version
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