Genetic introgression among differentiated clades is lower among clades exhibiting different parity modes
- Mechanisms leading to sympatric speciation are diverse and may build up reproductive isolation. Reproductive isolation among differentiated clades may exist due to genetic incompatibilities, sexual selection, differences in parity mode, reduced post-zygotic survival or reproductive success of hybrids. Here, we test whether differences in parity mode lead to reproductive isolation by investigating introgression in Zootoca vivipara, a lizard species exhibiting oviparous and viviparous reproduction. We measured introgression in transects spanning different viviparous clades, different oviparous subclades, transects containing oviparous and viviparous clades, and transects within the same subclade (control transects). Introgression in transects spanning oviparous and viviparous clades was one order of magnitude smaller than transects spanning the same reproductive mode and no statistical differences existed between transects spanning the same reproductive mode and control transects. Among types of transects, no significant differencesMechanisms leading to sympatric speciation are diverse and may build up reproductive isolation. Reproductive isolation among differentiated clades may exist due to genetic incompatibilities, sexual selection, differences in parity mode, reduced post-zygotic survival or reproductive success of hybrids. Here, we test whether differences in parity mode lead to reproductive isolation by investigating introgression in Zootoca vivipara, a lizard species exhibiting oviparous and viviparous reproduction. We measured introgression in transects spanning different viviparous clades, different oviparous subclades, transects containing oviparous and viviparous clades, and transects within the same subclade (control transects). Introgression in transects spanning oviparous and viviparous clades was one order of magnitude smaller than transects spanning the same reproductive mode and no statistical differences existed between transects spanning the same reproductive mode and control transects. Among types of transects, no significant differences existed in genetic and geographic distances, nor number of detected alleles. Moreover, hybrids were detected in all types of transects, showing that parity mode alone does not necessarily lead to complete reproductive isolation, which suggests that reinforcement may play an important role. The evolution of different parity modes together with reinforcement may thus promote reproductive isolation and rapid speciation, potentially explaining why only six of the almost 40,000 vertebrates belonging to groups consisting of viviparous and oviparous species exhibit bimodal reproduction.…
Author details: | J. L. Horreo, Merel Cathelijne BreedveldORCiD, D. Lindtke, B. Heulin, Yann Surget-GrobaORCiD, Patrick S. FitzeORCiD |
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DOI: | https://doi.org/10.1038/s41437-019-0201-7 |
ISSN: | 0018-067X |
ISSN: | 1365-2540 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/30833744 |
Title of parent work (English): | Heredity |
Publisher: | Nature Publ. Group |
Place of publishing: | London |
Publication type: | Article |
Language: | English |
Year of first publication: | 2019 |
Publication year: | 2019 |
Release date: | 2020/12/10 |
Volume: | 123 |
Issue: | 2 |
Number of pages: | 9 |
First page: | 264 |
Last Page: | 272 |
Funding institution: | Spanish MINECO postdoc grant [IJCI-2015-23618]; German Academic Exchange ServiceDeutscher Akademischer Austausch Dienst (DAAD); Swiss National Science FoundationSwiss National Science Foundation (SNSF) [PPOOP3_128375, PP00P3_152929/1]; Spanish Ministry of Education and ScienceSpanish Government [CGL2008-01522, CGL2012-32459, CGL2016-76918] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie |
Peer review: | Referiert |