Optional Endoreplication and Selective Elimination of Parental Genomes during Oogenesis in Diploid and Triploid Hybrid European Water Frogs.

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Version: author
Serval ID
serval:BIB_67E167B286FB
Type
Article: article from journal or magazin.
Collection
Publications
Title
Optional Endoreplication and Selective Elimination of Parental Genomes during Oogenesis in Diploid and Triploid Hybrid European Water Frogs.
Journal
PLoS One
Author(s)
Dedukh D., Litvinchuk S., Rosanov J., Mazepa G., Saifitdinova A., Shabanov D., Krasikova A.
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Publication state
Published
Issued date
2015
Peer-reviewed
Oui
Volume
10
Number
4
Pages
e0123304
Language
english
Abstract
Incompatibilities between parental genomes decrease viability of interspecific hybrids; however, deviations from canonical gametogenesis such as genome endoreplication and elimination can rescue hybrid organisms. To evaluate frequency and regularity of genome elimination and endoreplication during gametogenesis in hybrid animals with different ploidy, we examined genome composition in oocytes of di- and triploid hybrid frogs of the Pelophylax esculentus complex. Obtained results allowed us to suggest that during oogenesis the endoreplication involves all genomes occurring before the selective genome elimination. We accepted the hypothesis that only elimination of one copied genome occurs premeiotically in most of triploid hybrid females. At the same time, we rejected the hypothesis stating that the genome of parental species hybrid frogs co-exist with is always eliminated during oogenesis in diploid hybrids. Diploid hybrid frogs demonstrate an enlarged frequency of deviations in oogenesis comparatively to triploid hybrids. Typical for hybrid frogs deviations in gametogenesis increase variability of produced gametes and provide a mechanism for appearance of different forms of hybrids.

Keywords
Animals, Base Sequence, Chromosomes/genetics, Diploidy, Endoreduplication/genetics, Female, Genome, Genotype, Hybridization, Genetic, Oocytes/metabolism, Oogenesis/genetics, Ranidae/genetics, Repetitive Sequences, Nucleic Acid/genetics, Triploidy, Water
Pubmed
Web of science
Open Access
Yes
Create date
27/02/2017 11:32
Last modification date
20/08/2019 14:23
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