Analysis of the meiotic segregation in intergeneric hybrids of tilapias
| Autor: | Etienne Bezault, Frédéric Clota, Bernard Chevassus, Jean-François Baroiller, Xavier Rognon, Karim Gharbi |
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| Přispěvatelé: | Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Génétique Animale et Biologie Intégrative (GABI), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Department of Biology, Reed College, Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, AgroParisTech-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
0106 biological sciences
Article Subject tilapia [SDV]Life Sciences [q-bio] Hybridation intergénérique Évolution Genomics 010603 evolutionary biology 01 natural sciences 03 medical and health sciences symbols.namesake Meiosis Cichlid 030304 developmental biology Hybrid Génie génétique Genetics 0303 health sciences Génome biology hybrid Oreochromis niloticus Microsatellite Cichlidae L10 - Génétique et amélioration des animaux biology.organism_classification meiotic segregation Oreochromis Ségrégation Backcrossing Mendelian inheritance symbols Sarotherodon melanotheron M12 - Production de l'aquaculture Méiose Research Article |
| Zdroj: | International Journal of Evolutionary Biology International Journal of Evolutionary Biology, 2012, 2012, online, Non paginé. ⟨10.1155/2012/817562⟩ International Journal of Evolutionary Biology (2012, online), Non paginé. (2012) Bezault, E, Rognon, X, Clota, F, Gharbi, K, Baroiller, J-F & Chevassus, B 2012, ' Analysis of the meiotic segregation in intergeneric hybrids of tilapias ' vol. 2012, 817562 . DOI: 10.1155/2012/817562 |
| ISSN: | 2090-052X |
| DOI: | 10.1155/2012/817562⟩ |
| Popis: | 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 betweenOreochromis niloticusandSarotherodon 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. |
| Databáze: | OpenAIRE |
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