Tracing species replacement in Iberian marbled newts
| العنوان: | Tracing species replacement in Iberian marbled newts |
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| المؤلفون: | Isolde van Riemsdijk, Jan W. Arntzen, Julia López‐Delgado |
| المصدر: | Ecology and Evolution, 11(1), 402-414 Ecology and Evolution Ecology and Evolution, Vol 11, Iss 1, Pp 402-414 (2021) |
| بيانات النشر: | Wiley, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 0106 biological sciences, Range (biology), introgression, Triturus marmoratus, Introgression, 010603 evolutionary biology, 01 natural sciences, Gene flow, 03 medical and health sciences, Hybrid zone, enclave, secondary contact, Allele, hybridization, QH540-549.5, Ecology, Evolution, Behavior and Systematics, Original Research, 030304 developmental biology, Nature and Landscape Conservation, 0303 health sciences, amphibians, Ecology, biology, Interspecific competition, biology.organism_classification, Triturus, Evolutionary biology |
| الوصف: | Secondary contact between closely related species can lead to the formation of hybrid zones, allowing for interspecific gene flow. Hybrid zone movement can take place if one of the species possesses a competitive advantage over the other, ultimately resulting in species replacement. Such hybrid zone displacement is predicted to leave a genomic footprint across the landscape in the form of asymmetric gene flow (or introgression) of selectively neutral alleles from the displaced to the advancing species. Hybrid zone movement has been suggested for marbled newts in the Iberian Peninsula, supported by asymmetric gene flow and a distribution relict (i.e., an enclave) of Triturus marmoratus in the range of T. pygmaeus. We developed a panel of nuclear and mitochondrial SNP markers to test for the presence of a T. marmoratus genomic footprint in the Lisbon peninsula, south of the enclave. We found no additional populations of T. marmoratus. Analysis with the software Structure showed no genetic traces of T. marmoratus in T. pygmaeus. A principal component analysis showed some variation within the local T. pygmaeus, but it is unclear if this represents introgression from T. marmoratus. The results may be explained by (a) species replacement without introgressive hybridization and (b) displacement with hybridization followed by the near‐complete erosion of the footprint by purifying selection. We predict that testing for a genomic footprint north of the reported enclave would confirm that species replacement in these marbled newts occurred with hybridization. Hybrid zone movement has been suggested in the marbled newts, supported by the discovery of a Triturus marmoratus enclave. Here, we tested for a genomic footprint of species replacement of the receding T. marmoratus by the advancing T. pygmaeus, employing 54 newly developed nuclear SNPs and one mitochondrial DNA marker. In the absence of genetic traces of T. marmoratus in T. pygmaeus, we propose two biogeographic scenarios of species replacement. |
| وصف الملف: | application/pdf |
| تدمد: | 2045-7758 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e1e75403c3d09dc613b3034c7ad93a1Test https://doi.org/10.1002/ece3.7060Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....7e1e75403c3d09dc613b3034c7ad93a1 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20457758 |
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