Journal
HYDROBIOLOGIA
Volume 848, Issue 18, Pages 4241-4262Publisher
SPRINGER
DOI: 10.1007/s10750-021-04635-5
Keywords
Coregonids; Conspecific; Intra- and interspecific differentiation; Barcoding; Phylogeography; Phylogeny
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Funding
- Tyumen Oblast Government, as part of the West-Siberian Interregional Science and Education Center [89-DON (2)]
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This study revealed the phylogenetic relationships of three coregonid species: vendace, least cisco, and peled, based on nucleotide sequences analysis. The results showed that C. albula and C. sardinella are actually a single species, while peled is closely related to vendace. The reproductive isolation of peled was determined by chromosome rearrangements rather than nucleotide substitutions.
This study elucidates the phylogenetic relationships of three coregonid species: the vendace (Coregonus albula), least cisco (Coregonus sardinella), and peled (Coregonus peled). The nucleotide sequences of two mitochondrial DNA (mtDNA) regions, subunit I of the NADH dehydrogenase gene (nd1, 975 bp) and a fragment of the cytochrome oxidase subunit I gene (co1, 527 bp), were studied in representatives of these species from different populations. In addition, the polymorphism of a fragment of nuclear recombination-activating gene 1 (rag1, 1093 bp) was investigated. The species were not differentiated with respect to the co1 sequence, and a species-specific nucleotide substitution in the rag1 sequence was found in the peled. Phylogenetic analysis of the nd1 sequences confirmed that C. albula and C. sardinella are actually a single Eurasian species, C. albula, with European and Siberian populations being polyphyletic groups. The peled is closely related to the vendace and least cisco is apparently a separate monophyletic species that is poorly differentiated from C. albula. According to published data, reproductive isolation of the peled was determined by chromosome rearrangements that led to a change in the system of sex determination rather than by the accumulation of nucleotide substitutions.
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