Abstract
Twelve species of section Adenolinum from genus Linum have been studied using cytogenetic methods (DAPI/C-banding, Ag-NOR staining, FISH with 5S and 26S rDNA probes), RAPD analysis, and seed surface ultrastructure and seed coat anatomy investigation. Karyotype analysis revealed that these species have a chromosome number of 2n = 18 or 2n = 36. The DAPI/C-banding patterns enabled the identification of all chromosomes and revealed the similarities in chromosome patterns in all of the studied species. It was found that 18-chromosome plants are diploids, whereas 36-chromosome forms are tetraploids. In diploid species, 5S and 26S rRNA genes are located in similar positions on a single pair of chromosomes or on two chromosome pairs in tetraploids. Ag-NOR staining showed NOR activity in both genomes of tetraploids. RAPD analysis and seed coat anatomy investigation revealed some interspecies differences. Species from nearby areas have more similar RAPD characteristics compared with more geographically distant species. The results of this study may serve as an additional argument in favour of a monophyletic origination of the Adenolinum species and its strong isolation from other Linum species.
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Acknowledgments
The research was supported by grants from the Russian State Foundation for Basic Research (10-04-01212; 11-08-00716), the Russian Ministry of Education and Science (contracts 16.512.11.2224 and 16.552.11.7034) and the Program of Russian Academy of Sciences (Living Nature—Dynamics of Genepools Conservation).
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Yurkevich, O.Y., Naumenko-Svetlova, A.A., Bolsheva, N.L. et al. Investigation of genome polymorphism and seed coat anatomy of species of section Adenolinum from the genus Linum . Genet Resour Crop Evol 60, 661–676 (2013). https://doi.org/10.1007/s10722-012-9865-z
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DOI: https://doi.org/10.1007/s10722-012-9865-z