Líffræðifélag Íslands - biologia.is
Líffræðiráðstefnan 2021
Erindi/veggspjald / Talk/poster V36
Höfundar / Authors: Rares Cristea, Kasha Strickland, Bjarni K Kristjansson, Katja Räsänen
Starfsvettvangur / Affiliations: 1. Háskólinn á Hólum / Holar University, 2. University of Fribourg, 3. Eawag, Dübendorf
Kynnir / Presenter: Rares Cristea
Evolutionary and ecological processes, including selection, dispersal and gene flow, can be strongly sex-specific. In this project, we used 10x whole-genome sequencing data of threespine stickleback (Gasterosteus aculeatus) across five different habitats in lake Myvatn, to investigate sex-specific demographic process. First, we compared spatial patterns of divergence in autosomal DNA variants (reflecting divergence in bi-parentally inherited regions) between males and females to investigate whether dispersal is sex-biased. Second, we constructed haplotype networks of uniparentally inherited (mtDNA and Y chromosome) variants in order to infer patterns of divergence in maternal and paternal lineages. The results of the autosomal variants and the Y chromosome show extensive gene flow and provide no evidence for sex-biased dispersal across the different habitats. Furthermore, the mtDNA data indicate a single maternal haplotype, suggesting a common maternal lineage across the lake and no divergence in the maternal lineage. Overall there’s no clear evidence for sex-specific processes acting in lake Myvatn, although the results provide a clearer picture of the lake’s stickleback population.