Variation in heat shock protein 40 kDa relates to divergence in thermotolerance among cryptic rotifer species
(2022) In Scientific Reports 12(1).- Abstract
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... (More)
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.
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- author
- Kiemel, K. ; Gurke, M. ; Paraskevopoulou, S. LU ; Havenstein, K. ; Weithoff, G. and Tiedemann, R.
- organization
- publishing date
- 2022-12
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Scientific Reports
- volume
- 12
- issue
- 1
- article number
- 22626
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85145373218
- pmid:36587065
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-022-27137-3
- language
- English
- LU publication?
- yes
- id
- 9e2430ac-d8b5-4c50-b4cb-a75d5975d9c1
- date added to LUP
- 2023-01-16 16:00:56
- date last changed
- 2024-07-11 03:32:00
@article{9e2430ac-d8b5-4c50-b4cb-a75d5975d9c1,
abstract = {{<p>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.</p>}},
author = {{Kiemel, K. and Gurke, M. and Paraskevopoulou, S. and Havenstein, K. and Weithoff, G. and Tiedemann, R.}},
issn = {{2045-2322}},
language = {{eng}},
number = {{1}},
publisher = {{Nature Publishing Group}},
series = {{Scientific Reports}},
title = {{Variation in heat shock protein 40 kDa relates to divergence in thermotolerance among cryptic rotifer species}},
url = {{http://dx.doi.org/10.1038/s41598-022-27137-3}},
doi = {{10.1038/s41598-022-27137-3}},
volume = {{12}},
year = {{2022}},
}