Alloploid hybridization in the genus Sorbus: pink-flowered hybrids in the National Nature Reserve Skalná Alpa, Slovakia | Aloploidná hybridizácia v rode Sorbus: ružovokveté hybridy v NPR Skalná Alpa
2011
Kučerová, V., Technical University in Zvolen (Slovak Republic). Faculty of Forestry | Gomory, D. | Ďurkovič, J. | Paule, L. | Kardošová, M.
The study focuses on alloploid hybridization of subalpine Sorbus taxa, which includes S. chamaemespilus as one parent. In the nature reserve Skalná Alpa, five such interspecific hybrids occur, including the putative parental species S. aria, S. chamaemespilus and S. aucuparia. Chloroplast microsatellites were used to identify the maternal species and possible polyphyletic origin of hybrid taxa. We found that S. aria acts as pollen donor in three out of five hybrid taxa. S. chamaemespilus was found completely monomorphic and is thus suspected to be facultative apomictic species. Wood characters do not allow reliable discrimination of taxa, nevertheless, the hybrid S. zuzanae has transitional characters between the putative parental species. Interspecific genetic heterogeneity and a complete intraspecific homogeneity indicate that hybrid taxa are not systematically formed by multiple hybridizations de novo but rather represent monophyletic taxa.
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