TY  - GEN
A1  - Kiemel, Katrin
A1  - Gurke, Marie
A1  - Paraskevopoulou, Sofia
A1  - Havenstein, Katja
A1  - Weithoff, Guntram
A1  - Tiedemann, Ralph
T1  - Variation in heat shock protein 40 kDa relates to divergence in thermotolerance among cryptic rotifer species
T2  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Genetic divergence and the frequency of hybridization are central for defining species delimitations, especially among cryptic species where morphological differences are merely absent. Rotifers are known for their high cryptic diversity and therefore are ideal model organisms to investigate such patterns. Here, we used the recently resolved Brachionus calyciflorus species complex to investigate whether previously observed between species differences in thermotolerance and gene expression are also reflected in their genomic footprint. We identified a Heat Shock Protein gene (HSP 40 kDa) which exhibits cross species pronounced sequence variation. This gene exhibits species-specific fixed sites, alleles, and sites putatively under positive selection. These sites are located in protein binding regions involved in chaperoning and may therefore reflect adaptive diversification. By comparing three genetic markers (ITS, COI, HSP 40 kDa), we revealed hybridization events between the cryptic species. The low frequency of introgressive haplotypes/alleles suggest a tight, but not fully impermeable boundary between the cryptic species.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1305 
Y1  - 2023
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/57863
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-578635
SN  - 1866-8372
IS  - 1305
ER  -