Karyological and Molecular Genetic Divergence of Sculpins Myoxocephalus Gill, 1859 (Cottidae)

Radchenko, O. A.; Морева, И. Н.; Petrovskaya, A. V.

doi:10.1134/s1022795420100117

Cited by 6 publications

(7 citation statements)

References 15 publications

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“…It can also be stated that Megalocottus and Myoxocephalus quadricornis are closely related at the level of species within the same genus: their genetic distances constitute only 2.62% and 0.52% for mitochondrial and nuclear data, respectively, whereas the respective minimum values between species of different genera are on average 7.28% and 0.75% (Table 3). Furthermore, this supports the earlier conclusions (Balakirev et al, 2020;Knope, 2013;Radchenko et al, 2020) about the heterogeneity of the genus Myoxocephalus, its division into the Pacific and Arctic-Atlantic phylogenetic lines (clusters I and L in Figure 3), and the necessity to revise the taxonomic status of Myoxocephalus quadricornis.…”

Section: Relationships Between the Genera Of The Subfamily Myoxocephalinaesupporting

confidence: 88%

“…Their marker traits include the small M chromosomes, similarly sized SM-ST, and large ST and A chromosomes. Myoxocephalus jaok, having uni-armed chromosomes represented by only two pairs of small A chromosomes, is an exception to this group (Radchenko et al, 2020). Megalocottus platycephalus is similar to the species of the genus Myoxocephalus, with NF = 44 + 2 (Table 2).…”

Section: Relationships Between the Genera Of The Subfamily Myoxocephalinaementioning

confidence: 97%

“…A pair of morphologically variable SM-ST chromosomes was identified in the sculpin karyotypes (Table 2), which may appear as SM or ST chromosomes in different cells of the specimens, depending on the length of the short arms. For this reason, the number of chromosomal arms (NF) is indicated with both possible variants: 46 + 2 and 44 + 2 (Radchenko et al, 2020). Individuals of Myoxocephalus stelleri from the seas of Okhotsk and Japan, which have a stable number of chromosomes (2n), differ in the main characters of their chromosome sets (Podlesnykh & Moreva, 2014).…”

Section: Karyological Analysismentioning

confidence: 99%

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The subfamily Myoxocephalinae of cottid fishes (Cottidae): Genetic divergence and phylogenetic relationships

Radchenko

Морева

Petrovskaya

2021

Journal of Fish Biology

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A comprehensive study based on molecular marker and karyotype analyses has provided evidence for the monophyly of the subfamily Myoxocephalinae, which includes the genera Myoxocephalus, Megalocottus, Microcottus, Porocottus, Enophrys and Argyrocottus. In addition, the karyotype of the threadfoot sculpin Argyrocottus zanderi Herzenstein 1892 has been studied for the first time. Marker traits of karyotypes identified 13 species among six cottid genera. As the molecular genetic results confirmed, the subfamily is divided into two groups corresponding to Enophrys and Myoxocephalus. The molecular genetic data did not support the formation of tribes within the subfamily Myoxocephalinae, as proposed earlier based on morphological characters. Moreover, the genera Trichocottus and Taurocottus should be excluded from the Myoxocephalinae. The evolutionary transformations of karyotypes in cottid fish tended towards a reduction in the number of chromosomes and chromosome arms.

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Section: Relationships Between the Genera Of The Subfamily Myoxocephalinaesupporting

confidence: 88%

Section: Relationships Between the Genera Of The Subfamily Myoxocephalinaementioning

confidence: 97%

Section: Karyological Analysismentioning

confidence: 99%

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The subfamily Myoxocephalinae of cottid fishes (Cottidae): Genetic divergence and phylogenetic relationships

Radchenko

Морева

Petrovskaya

2021

Journal of Fish Biology

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“…These similarities, as well as NF (44 + 2), suggest that the metacentrics and submetacentrics in cytotypes II-V were formed through Robertsonian fusions. Karyological studies show that Robertsonian translocations are the main mechanism of structural changes in the chromosomes of marine sculpins of the family Cottidae (Vasilyev 1985;Terashima and Ida 1991;Moreva et al , 2019Radchenko et al 2020). Here we report the highest intraspecific variability in 2n (40 to 44) documented to date for this fish group (Arai 2011;Moreva et al , 2019Moreva 2020).…”

Section: Discussionmentioning

confidence: 99%

“…The frog sculpin karyotype was first described from Amur Bay, Sea of Japan (Miller 2000). Unlike other Myoxocephalus species from the Sea of Japan and Sea of Okhotsk (Radchenko et al 2020), M. stelleri exhibits chromosomal variation. Karyological analysis of morphologically indistinguishable individuals from Odyan Bay and Amur Bay revealed their differences not only in the diploid numbers (2n) (2n = 44 vs. 2n = 40; fundamental numbers (NF) 44 + 2), but also in the number and localization of active nucleolar organizers (NORs) (Podlesnykh and Moreva 2014).…”

Section: Introductionmentioning

confidence: 99%

Differentiation of the frog sculpin Myoxocephalus stelleri Tilesius, 1811 (Actinopterygii, Cottidae) based on mtDNA and karyotype analyses

Морева¹,

Radchenko²,

Petrovskaya³

2021

CCG

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A molecular genetic and karyological study of the frog sculpin Myoxocephalus stelleri Tilesius, 1811 was carried out on an extensive sample from a large area of the species’ range. A total of 42 specimens was sampled from the Sea of Japan, Sea of Okhotsk, and coastal waters off the southern Kuril Islands, which makes this sampling scheme the most comprehensive to date. The level of mtDNA polymorphism was found to be low. The haplotypes of the species formed three phylogenetic groups. The unique M. stelleri haplotype from the coast of Shikotan Island linked all the studied groups, indicating that it is likely ancestral. Robertsonian polymorphism was identified in the species. In all five cytotypes (I – 2n = 44, II – 2n = 43, III – 2n = 42, IV – 2n = 41, V – 2n = 40; NF = 44+2) were identified, all of which were present in the Sea of Japan. Only one (cytotype I) was found in the Sea of Okhotsk, which is probably the closest to the ancestral karyotype. The significant chromosomal polymorphism and the presence of common haplotypes in the studied samples indicate their recent origin from a common ancestor and/or relatively recent contacts within the range. The discrepancies between mtDNA and karyotypes in assigning the ancestral M. stelleri to the coastal waters off Shikotan Island (southern Kuril Islands) and the Sea of Okhotsk, respectively, can be explained by the different inheritance mechanisms and the rates of evolution of molecular genetic and karyological traits.

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Differentiation of the Arctic Sculpin Myoxocephalus scorpioides (Fabricius, 1780) and its position among species of the genus Myoxocephalus (Cottidae)

Moreva,

Radchenko,

Petrovskaya

2025

Zoologischer Anzeiger

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Karyological and Molecular Genetic Divergence of Sculpins Myoxocephalus Gill, 1859 (Cottidae)

Cited by 6 publications

References 15 publications

The subfamily Myoxocephalinae of cottid fishes (Cottidae): Genetic divergence and phylogenetic relationships

The subfamily Myoxocephalinae of cottid fishes (Cottidae): Genetic divergence and phylogenetic relationships

Differentiation of the frog sculpin Myoxocephalus stelleri Tilesius, 1811 (Actinopterygii, Cottidae) based on mtDNA and karyotype analyses

Differentiation of the Arctic Sculpin Myoxocephalus scorpioides (Fabricius, 1780) and its position among species of the genus Myoxocephalus (Cottidae)

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