Restricted X chromosome introgression and support for Haldane's rule in hybridizing damselflies
Swaegers, Janne LU ; Sanchez-Guillen, Rosa Ana LU ; Chauhan, Pallavi LU ; Wellenreuther, Maren LU and Hansson, Bengt LU
(2022)
In Proceedings of the Royal Society B: Biological Sciences
289(1979).
- Abstract
Contemporary hybrid zones act as natural laboratories for the investigation of species boundaries and may shed light on the little understood roles of sex chromosomes in species divergence. Sex chromosomes are considered to function as a hotspot of genetic divergence between species; indicated by less genomic introgression compared to autosomes during hybridization. Moreover, they are thought to contribute to Haldane's rule, which states that hybrids of the heterogametic sex are more likely to be inviable or sterile. To test these hypotheses, we used contemporary hybrid zones of Ischnura elegans, a damselfly species that has been expanding its range into the northern and western regions of Spain, leading to chronic hybridization with... (More)
Contemporary hybrid zones act as natural laboratories for the investigation of species boundaries and may shed light on the little understood roles of sex chromosomes in species divergence. Sex chromosomes are considered to function as a hotspot of genetic divergence between species; indicated by less genomic introgression compared to autosomes during hybridization. Moreover, they are thought to contribute to Haldane's rule, which states that hybrids of the heterogametic sex are more likely to be inviable or sterile. To test these hypotheses, we used contemporary hybrid zones of Ischnura elegans, a damselfly species that has been expanding its range into the northern and western regions of Spain, leading to chronic hybridization with its sister species Ischnura graellsii. We analysed genome-wide SNPs in the Spanish I. elegans and I. graellsii hybrid zone and found (i) that the X chromosome shows less genomic introgression compared to autosomes, and (ii) that males are underrepresented among admixed individuals, as predicted by Haldane's rule. This is the first study in Odonata that suggests a role of the X chromosome in reproductive isolation. Moreover, our data add to the few studies on species with X0 sex determination system and contradict the hypothesis that the absence of a Y chromosome causes exceptions to Haldane's rule.
(Less)
- author
- Swaegers, Janne
LU
; Sanchez-Guillen, Rosa Ana
LU
; Chauhan, Pallavi
LU
; Wellenreuther, Maren
LU
and Hansson, Bengt
LU
- organization
- publishing date
- 2022-07-27
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Haldane's rule, hybrid zone, sex chromosome, species divergence
- in
- Proceedings of the Royal Society B: Biological Sciences
- volume
- 289
- issue
- 1979
- article number
- 20220968
- publisher
- Royal Society Publishing
- external identifiers
-
- scopus:85134634937
- pmid:35855603
- ISSN
- 0962-8452
- DOI
- 10.1098/rspb.2022.0968
- language
- English
- LU publication?
- yes
- id
- 89d4f946-9131-410c-a2fe-2b4eb9a9e7aa
- date added to LUP
- 2022-09-07 15:34:30
- date last changed
- 2024-06-13 19:10:21
@article{89d4f946-9131-410c-a2fe-2b4eb9a9e7aa,
abstract = {{<p>Contemporary hybrid zones act as natural laboratories for the investigation of species boundaries and may shed light on the little understood roles of sex chromosomes in species divergence. Sex chromosomes are considered to function as a hotspot of genetic divergence between species; indicated by less genomic introgression compared to autosomes during hybridization. Moreover, they are thought to contribute to Haldane's rule, which states that hybrids of the heterogametic sex are more likely to be inviable or sterile. To test these hypotheses, we used contemporary hybrid zones of Ischnura elegans, a damselfly species that has been expanding its range into the northern and western regions of Spain, leading to chronic hybridization with its sister species Ischnura graellsii. We analysed genome-wide SNPs in the Spanish I. elegans and I. graellsii hybrid zone and found (i) that the X chromosome shows less genomic introgression compared to autosomes, and (ii) that males are underrepresented among admixed individuals, as predicted by Haldane's rule. This is the first study in Odonata that suggests a role of the X chromosome in reproductive isolation. Moreover, our data add to the few studies on species with X0 sex determination system and contradict the hypothesis that the absence of a Y chromosome causes exceptions to Haldane's rule. </p>}},
author = {{Swaegers, Janne and Sanchez-Guillen, Rosa Ana and Chauhan, Pallavi and Wellenreuther, Maren and Hansson, Bengt}},
issn = {{0962-8452}},
keywords = {{Haldane's rule; hybrid zone; sex chromosome; species divergence}},
language = {{eng}},
month = {{07}},
number = {{1979}},
publisher = {{Royal Society Publishing}},
series = {{Proceedings of the Royal Society B: Biological Sciences}},
title = {{Restricted X chromosome introgression and support for Haldane's rule in hybridizing damselflies}},
url = {{http://dx.doi.org/10.1098/rspb.2022.0968}},
doi = {{10.1098/rspb.2022.0968}},
volume = {{289}},
year = {{2022}},
}