Microsatellite marker analysis of macedonian grapevines (<em>Vitis vinifera</em> L.) compared to Bulgarian and Greek cultivars

Aims: Eleven Macedonian grapevine accessions were genotyped by microsatellite profiling at 9 microsatellite loci, in order to identify Macedonian cultivars and to evaluate the relationships among them. The comparison with grapevine cultivars from two neighbouring countries was also performed. Methods and results: Clustering analyses based on the proportion of shared alleles resulted in two clusters containing all accessions except cultivar « Vranec », which was distant from the others. Comparison of genotyping results of Macedonian accessions with 76 Bulgarian and 298 Greek accessions revealed no identical genotypes. In the dendogram, Macedonian accessions are dispersed among Greek and Bulgarian grapevines, suggesting a common genetic background. Additionaly, the synonyms « Smederevka » = « Dimyat » = « Zoumiatiko » and « Belo Zimsko » = « Karatsova Naousis » were also evaluated. Conclusions: Clustering analyses showed that authentic Macedonian cultivars are distant from two widespread cultivars « Vranec » and « Smederevka ». Comparison of Macedonian cultivars with their synonyms from Greece and Bulgaria revealed differences in allelic profiles at some loci, but further analyses are needed to confirm their unique allelic profiles. Significance and impact of study: This work is a first step towards the genetic characterization of Macedonian grapevine germplasm, thus contributing to the molecular investigation of grapevine germplasm within the Balkan region

Identification of Citruses from Montenegro Based on Microsatellite Clustering Analyses

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Extraction of a core collection from Finnish apple accessions based on a nuclear microsatellite analysis

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Plant genera Cannabis and Humulus share the same pair of differentiated chromosomes

ResearchWe recently described, in Cannabis sativa, the oldest sex chromosome system documented so far in plants (12–28 Myr old). Based on the estimated age, we predicted that it should be shared by its sister genus Humulus, which is known also to possess XY chromosomes. Here, we used transcriptome sequencing of an F1 family of H. lupulus to identify and study the sex chromosomes in this species using the probabilistic method SEX-DETECTOR. We identified 265 sex-linked genes in H. lupulus, which preferentially mapped to the C. sativa X chromosome. Using phylogenies of sex-linked genes, we showed that a region of the sex chromosomes had already stopped recombining in an ancestor of both species. Furthermore, as in C. sativa, Y-linked gene expression reduction is correlated to the position on the X chromosome, and highly Y degenerated genes showed dosage compensation. We report, for the first time in Angiosperms, a sex chromosome system that is shared by two different genera. Thus, recombination suppression started at least 21–25 Myr ago, and then (either gradually or step-wise) spread to a large part of the sex chromosomes (c. 70%), leading to a degenerated Y chromosomeinfo:eu-repo/semantics/publishedVersio