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Analysis of the Meiotic Segregation in Intergeneric Hybrids of Tilapias
Joint Authors
Bezault, Etienne
Chevassus, Bernard
Baroiller, Jean-Francois
Clota, Frederic
Gharbi, Karim
Rognon, Xavier
Source
International Journal of Evolutionary Biology
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-18
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Tilapia species exhibit a large ecological diversity and an important propensity to interspecific hybridisation.
This has been shown in the wild and used in aquaculture.
However, despite its important evolutionary implications, few studies have focused on the analysis of hybrid genomes and their meiotic segregation.
Intergeneric hybrids between Oreochromis niloticus and Sarotherodon melanotheron, two species highly differentiated genetically, ecologically, and behaviourally, were produced experimentally.
The meiotic segregation of these hybrids was analysed in reciprocal second generation hybrid (F2) and backcross families and compared to the meiosis of both parental species, using a panel of 30 microsatellite markers.
Hybrid meioses showed segregation in accordance to Mendelian expectations, independent from sex and the direction of crosses.
In addition, we observed a conservation of linkage associations between markers, which suggests a relatively similar genome structure between the two parental species and the apparent lack of postzygotic incompatibility, despite their important divergence.
These results provide genomics insights into the relative ease of hybridisation within cichlid species when prezygotic barriers are disrupted.
Overall our results support the hypothesis that hybridisation may have played an important role in the evolution and diversification of cichlids.
American Psychological Association (APA)
Bezault, Etienne& Rognon, Xavier& Clota, Frederic& Gharbi, Karim& Baroiller, Jean-Francois& Chevassus, Bernard. 2012. Analysis of the Meiotic Segregation in Intergeneric Hybrids of Tilapias. International Journal of Evolutionary Biology،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-500512
Modern Language Association (MLA)
Bezault, Etienne…[et al.]. Analysis of the Meiotic Segregation in Intergeneric Hybrids of Tilapias. International Journal of Evolutionary Biology No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-500512
American Medical Association (AMA)
Bezault, Etienne& Rognon, Xavier& Clota, Frederic& Gharbi, Karim& Baroiller, Jean-Francois& Chevassus, Bernard. Analysis of the Meiotic Segregation in Intergeneric Hybrids of Tilapias. International Journal of Evolutionary Biology. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-500512
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-500512