  To date, twelve complete genomes representing eleven species belonging to six
genera have been sequenced in salmonids. For the genus Salvelinus, it was
supposed to sequence the genome of Arctic char, one of the most variable
species of vertebrate animals. Sequencing was carried out (Christensen et al.,
2018) using the tissues of the female IW2-2015 obtained from the company
engaged in industrial aquaculture of chars - Icy Waters Ltd. The company
exploits two of its own broodstocks - NL and TR, originating from the chars
from the Nauyuk Lake and the Tree River (Nunavut, Canada). Since the complete
mitochondrial genome of the female IW2-2015 was absent in the published
assembly ASM291031v2, we determined its type and complete sequence from the
sequence read archives taken from Genbank. It was found that the female's
mitogenome belongs to the BERING haplogroup, which is characteristic of
Northern Dolly Varden S. malma malma. Analysis of other unlinked diagnostic
loci encoded by nuclear DNA (ITS1, RAG1, SFO-12, SFO-18, SMM-21) also revealed
distinctive characters of Northern Dolly Varden in female IW2-2015. It was
concluded that the genomic assembly ASM291031v2 was obtained not from an
individual of Arctic char S. alpinus, but from an individual of a related
species - Northern Dolly Varden S. malma malma. The identical to the IW2-2015
female characteristics of diagnostic loci were found in other individuals from
the broodstock TR. Apparently, the broodstock TR is entirely a strain derived
from Northern Dolly Varden. Since assembly ASM291031v2 was obtained from a
specimen originated from the marginal population of Northern Dolly Varden (Tree
R.) isolated from the main range of the species and with some traces of
introgressive hybridization, this assembly can hardly be considered as a
description of a typical genome of S. malma malma.
