Asexual Reproduction Does Not Apparently Increase the Rate of Chromosomal Evolution: Karyotype Stability in Diploid and Triploid Clonal Hybrid Fish (Cobitis, Cypriniformes, Teleostei)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F16%3AA1701I7V" target="_blank" >RIV/61988987:17310/16:A1701I7V - isvavai.cz</a>

Alternative codes found

RIV/67985904:_____/16:00458489 RIV/00216208:11310/16:10325884 RIV/61988987:17310/16:A21025GG

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Asexual Reproduction Does Not Apparently Increase the Rate of Chromosomal Evolution: Karyotype Stability in Diploid and Triploid Clonal Hybrid Fish (Cobitis, Cypriniformes, Teleostei)

Original language description

Interspecific hybridization, polyploidization and transitions from sexuality to asexuality considerablyaffect organismal genomes. Especially the last mentioned process has beenassumed to play a significant role in the initiation of chromosomal rearrangements, causingincreased rates of karyotype evolution. We used cytogenetic analysis and molecular datingof cladogenetic events to compare the rate of changes of chromosome morphology and karyotypein asexually and sexually reproducing counterparts in European spined loach fish(Cobitis). We studied metaphases of three sexually reproducing species and their diploidand polyploid hybrid clones of different age of origin. The material includes artificial F1hybrid strains, representatives of lineage originated in Holocene epoch, and also individualsof an oldest known age to date (roughly 0.37 MYA). Thereafter we applied GISH techniqueas a marker to differentiate parental chromosomal sets in hybrids. Although the sexualspecies accumulated remarkable chromosomal rearrangements after their speciation, weobserved no differences in chromosome numbers and/or morphology among karyotypesof asexual hybrids. These hybrids possess chromosome sets originating from respectiveparental species with no cytogenetically detectable recombinations, suggesting theirintegrity even in a long term. The switch to asexual reproduction thus did not provoke anysignificant acceleration of the rate of chromosomal evolution in Cobitis. Asexual animalsdescribed in other case studies reproduce ameiotically, while Cobitis hybrids describedhere produce eggs likely through modified meiosis. Therefore, our findings indicate that theeffect of asexuality on the rate of chromosomal change may be context-dependent ratherthan universal and related to particular type of asexual reproduction.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EG - Zoology

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

plos ONe

ISSN

1932-6203

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

18

Pages from-to

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UT code for WoS article

000369527800036

EID of the result in the Scopus database

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