On the origin of the lacustrine charr Salvelinus alpinus complex from the Kolyma and Sea of Okhotsk basinsстатья
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Аннотация:Morphological and genetic characteristics are used for the analysis of the origin of charrs from the
lakes of the Kolyma basin (Chuk, Gek, Gulyaevskoe-4, Gulyaevskoe-6, and Lenkovoe) and the Sea of
Okhotsk basin (Lake Chistoe). In addition to these samples, the fragments of the control region of mitochon-
drial DNA (CR mtDNA, 550-bp) and exon 2 of recombination activating gene 1 (RAG1, 899-bp) are
sequenced in the charrs from lakes Dzhul’etta and Cherechen’ (Kolyma basin) and lakes Elikchanskie,
Bol’shoi Mak-Mak, Ueginskoe (Sea of Okhotsk basin), Ulakhan-Silyan-Kyuel’ (Yana River basin) as well as
in northern Dolly Varden from the Kamchatka River. The charr from Lake Chistoe is represented by northern
Dolly Varden. In the charrs from lakes Chuk, Gek, Gulyaevskoe-4, Gulyaevskoe-6, Lenkovoe, Cherechen’,
Elikchanskie, Bol’shoi Mak-Mak, and Ueginskoe, the haplotypes of mtDNA of the Bering group (a hap-
logroup of northern Dolly Varden) are revealed. Based on the morphological and RAG1 data, populations of
charrs from these lakes belong to the Salvelinus alpinus complex. A transfer of mtDNA of northern Dolly Var-
den to the charrs from the Kolyma and Sea of Okhotsk basins occurred during the last postglacial expansion
and subsequent hybridization. Based on the results of morphological and genetic analysis, the charrs from the
Kolyma and Sea of Okhotsk basins cannot be unambiguously referred to the phylogenetic groups of Eurasian
Arctic charr or Taranets charr. The presence of mtDNA haplotypes of the Arctic group (a haplogroup of
Taranets charr) in the populations of lakes Dzhul’etta, Maksi, and Ueginskoe shows a possibility of their
belonging to the group of Taranets charr.