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Cytogenetic and histological studies of the brook trout, Salvelinus fontinalis (Mitchill), and the Arctic char, S-alpinus (L.) hybrids

2014-02Journal article Open access
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dc.contributor.authorOcalewicz, Konrad
dc.contributor.authorHliwa, Piotr
dc.contributor.authorPomianowski, Konrad
dc.contributor.authorLisboa, Rodrigo
dc.contributor.authorJankun, Malgorzata
dc.date.accessioned2018-12-07T14:52:57Z
dc.date.available2018-12-07T14:52:57Z
dc.date.issued2014-02
dc.description.abstractAlthough brook trout and the Arctic char hybrids are able to reproduce, individuals with decreased fertility or even fish that are unable to produce any gametes have been also described. Abnormal gonadal development and disturbances in the gamete production in the char hybrid offspring may be triggered by the odd chromosome number and disturbances in their pairing during meiosis. To verify this hypothesis, cytogenetic examination and the gonadal histology analysis of the brook trout x Arctic char hybrids were carried out. Diploid chromosome number in the studied char (F-1) hybrids varied from 82 to 84 (FN = 99-102). Among 28 hybrids, 12 males, three females, nine intersex individuals and two sterile specimens were described. In the case of two individuals, gonads were not found. Diploid chromosome numbers in the males and intersex individuals varied from 82 to 84. Chromosome numbers in the females were 82 and 83 chromosomes. Two sterile fish exhibited karyotypes composed of 82 and 84 chromosomes. Predominance of the ovarian component in the intersex gonads and gonadal sex ratio distortion towards the males suggested hybrid females had problems with gonadal differentiation. However, the lack of the clear relationship between chromosome number and gonadal development in the studied hybrids did not support our hypothesis that odd chromosome number may be responsible for such reproductive disturbances in the hybrid individuals. We have presumed that sterility and intersexual development of the gonads may be caused by interactions between brook trout and Arctic char genes on the sex chromosomes and autosomes rather than unpairing of the parental chromosomes.
dc.description.sponsorshipPolish National Science Center (NCN) [N N311 525240]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1007/s10499-013-9655-4
dc.identifier.issn0967-6120
dc.identifier.issn1573-143X
dc.identifier.urihttp://hdl.handle.net/10400.1/11283
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectTelomeric sequences
dc.subjectSalmon
dc.subjectHybridization
dc.subjectPisces
dc.subjectFish
dc.subjectChromosomes
dc.subjectGonads
dc.subjectIntersex
dc.subjectReproduction
dc.subjectSex differentiation
dc.titleCytogenetic and histological studies of the brook trout, Salvelinus fontinalis (Mitchill), and the Arctic char, S-alpinus (L.) hybrids
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage288
oaire.citation.issue1
oaire.citation.startPage281
oaire.citation.titleAquaculture International
oaire.citation.volume22
person.familyNameOcalewicz
person.familyNameHliwa
person.givenNameKonrad
person.givenNamePiotr
person.identifier.orcid0000-0001-7122-7542
person.identifier.orcid0000-0001-5205-608X
person.identifier.scopus-author-id6602786434
person.identifier.scopus-author-id6507118587
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublicationaec51ad6-a95e-4209-bff5-6306fa19be27
relation.isAuthorOfPublicationb87c302b-8162-4049-8e6c-942988d307c8
relation.isAuthorOfPublication.latestForDiscoveryb87c302b-8162-4049-8e6c-942988d307c8

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