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Patterns of gene flow and selection across multiple species of Acrocephalus warblers: footprints of parallel selection on the Z chromosome

SYSNO ASEP	0460182
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Patterns of gene flow and selection across multiple species of Acrocephalus warblers: footprints of parallel selection on the Z chromosome
Author(s)	Reifová, R. (CZ) Majerová, V. (CZ) Reif, J. (CZ) Ahola, M. (FI) Lindholm, A. (FI) Procházka, Petr (UBO-W)_{RID, ORCID, SAI}
Number of authors	6
Source Title	BMC Evolutionary Biology. - : BioMed Central - ISSN 1471-2148 Roč. 16, č. 130 (2016), s. 130
Number of pages	12 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	Adaptive radiation ; Speciation ; Gene flow ; Parallel adaptive evolution ; Z chromosome ; Acrocephalus warblers
Subject RIV	EG - Zoology
Institutional support	UBO-W - RVO:68081766
UT WOS	000378044600003
EID SCOPUS	84975852933
DOI	10.1186/s12862-016-0692-2
Annotation	We analyzed nucleotide variation at eight nuclear loci in three hybridizing Acrocephalus species with overlapping breeding ranges in Europe. Using an isolation-with-migration model for multiple populations, we found evidence for unidirectional gene flow from A. scirpaceus to A. palustris and from A. palustris to A. dumetorum. Gene flow was higher between genetically more closely related A. scirpaceus and A. palustris than between ecologically more similar A. palustris and A. dumetorum, suggesting that gradual accumulation of intrinsic barriers rather than divergent ecological selection are more efficient in restricting interspecific gene flow in Acrocephalus warblers. Although levels of genetic differentiation between different species pairs were in general not correlated, we found signatures of apparently independent instances of positive selection at the same two Z-linked loci in multiple species. Our study brings the first evidence that gene flow occurred during Acrocephalus radiation and not only between sister species. Interspecific gene flow could thus be an important source of genetic variation in individual Acrocephalus species and could have accelerated adaptive evolution and speciation rate in this avian group by creating novel genetic combinations and new phenotypes. Independent instances of positive selection at the same loci in multiple species indicate an interesting possibility that the same loci might have contributed to reproductive isolation in several speciation events.
Workplace	Institute of Vertebrate Biology
Contact	Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524
Year of Publishing	2017

Number of the records: 1