Premeiotic endoreplication is the mechanism of obligate parthenogenesis in rock lizards of the genus Darevskia
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985904%3A_____%2F24%3A00598581" target="_blank" >RIV/67985904:_____/24:00598581 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/24:10489203
Result on the web
<a href="https://royalsocietypublishing.org/doi/10.1098/rsbl.2024.0182" target="_blank" >https://royalsocietypublishing.org/doi/10.1098/rsbl.2024.0182</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1098/rsbl.2024.0182" target="_blank" >10.1098/rsbl.2024.0182</a>
Alternative languages
Result language
angličtina
Original language name
Premeiotic endoreplication is the mechanism of obligate parthenogenesis in rock lizards of the genus Darevskia
Original language description
Among vertebrates, obligate parthenogenesis occurs exclusively in squamate reptiles. Premeiotic endoreplication in a small subset of developing oocytes has been documented as the mechanism of production of unreduced eggs in minutely explored obligate parthenogenetic lineages, namely in teiids and geckos. The situation in the lacertid genus Darevskia has been discussed for decades. Certain observations suggested that the ploidy level is restored during egg formation through a fusion of egg and polar body nuclei in Darevskia unisexualis and D. armeniaca. In this study, we re-evaluated the fusion hypothesis by studying diplotene chromosomes in adult females of sexual species D. raddei nairensis and obligate parthenogens D. armeniaca, D. dahli and D. unisexualis. We revealed 19 bivalents in the sexual species and 38 bivalents in the diploid obligate parthenogens, which uncovers premeiotic endoreplication as the mechanism of the production of non-reduced eggs in parthenogenetic females. The earlier contradicting reports can likely be attributed to the difficulty in identifying mispairing of chromosomes in pachytene, and the fact that in parthenogenetic reptiles relying on premeiotic endoreplication only a small subset of developing oocytes undergo genome doubling and overcome the pachytene checkpoint. This study highlights co-option of premeiotic endoreplication for escape from sexual reproduction in all independent hybrid origins of obligate parthenogenesis in vertebrates studied to date.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10613 - Zoology
Result continuities
Project
<a href="/en/project/GA23-07665S" target="_blank" >GA23-07665S: Is hybridization the only way to asexuality in vertebrates?</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Biology Letters
ISSN
1744-9561
e-ISSN
1744-957X
Volume of the periodical
20
Issue of the periodical within the volume
9
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
20240182
UT code for WoS article
001314610900001
EID of the result in the Scopus database
2-s2.0-85204512718