Intragenomic Polymorphism of 35S rDNA Internal Transcribed Spacers: Verification of the Hypothesis on the Hybridogenic Origin of Tetraploid Pulsatilla vulgaris
Abstract
Abstract Pulsatilla vulgaris (pasque flower) is a rare and endangered plant species. Using ITS1-5.8S rDNA-ITS2 barcode sequencing and locus-specific NGS of the ITS1 spacer, we studied intraspecific and interspecific polymorphism of 35S rDNA loci and investigated the origin of tetraploid P. vulgaris from a unique Russian population. For the first time, the chromosome number in the karyotype of plants from this population was determined as 2n = 32. It was shown that one of the parental species of this tetraploid is the diploid Pulsatilla patens (2n = 16), while the identity of the second parental species remains unknown, although it appears to be closely related to the diploid Pulsatilla pratensis.
Fields of Study & Subjects
Chromosomal and Genetic Variations
Plant Taxonomy and Phylogenetics
Plant Ecology and Taxonomy Studies
Publication details
- Journal / source
- Biochemistry (Moscow)
- Volume
- 91
- Issue
- 1
- Pages
- 131–144
- Publication date
- 1 January 2026
- Language
- EN