Genomic signatures of drift and selection driven by predation and human pressure in an insular lizard

Abstract Genomic divergence was studied in 10 small insular populations of the endangered Balearic Islands lizard (Podarcis lilfordi) using double digest restriction-site associated DNA sequencing. The objectives were to establish levels of divergence among populations, investigate the impact of pop...

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Autores principales:	Marta Bassitta, Richard P. Brown, Ana Pérez-Cembranos, Valentín Pérez-Mellado, José A. Castro, Antònia Picornell, Cori Ramon
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/364e5c53bd8c47a6a6b34c63879ed59d
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spelling	oai:doaj.org-article:364e5c53bd8c47a6a6b34c63879ed59d2021-12-02T16:31:13ZGenomic signatures of drift and selection driven by predation and human pressure in an insular lizard10.1038/s41598-021-85591-x2045-2322https://doaj.org/article/364e5c53bd8c47a6a6b34c63879ed59d2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85591-xhttps://doaj.org/toc/2045-2322Abstract Genomic divergence was studied in 10 small insular populations of the endangered Balearic Islands lizard (Podarcis lilfordi) using double digest restriction-site associated DNA sequencing. The objectives were to establish levels of divergence among populations, investigate the impact of population size on genetic variability and to evaluate the role of different environmental factors on local adaptation. Analyses of 72,846 SNPs supported a highly differentiated genetic structure, being the populations with the lowest population size (Porros, Foradada and Esclatasang islets) the most divergent, indicative of greater genetic drift. Outlier tests identified ~ 2% of loci as candidates for selection. Genomic divergence-Enviroment Association analyses were performed using redundancy analyses based on SNPs putatively under selection, detecting predation and human pressure as the environmental variables with the greatest explanatory power. Geographical distributions of populations and environmental factors appear to be fundamental drivers of divergence. These results support the combined role of genetic drift and divergent selection in shaping the genetic structure of these endemic island lizard populations.Marta BassittaRichard P. BrownAna Pérez-CembranosValentín Pérez-MelladoJosé A. CastroAntònia PicornellCori RamonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Marta Bassitta Richard P. Brown Ana Pérez-Cembranos Valentín Pérez-Mellado José A. Castro Antònia Picornell Cori Ramon Genomic signatures of drift and selection driven by predation and human pressure in an insular lizard
description	Abstract Genomic divergence was studied in 10 small insular populations of the endangered Balearic Islands lizard (Podarcis lilfordi) using double digest restriction-site associated DNA sequencing. The objectives were to establish levels of divergence among populations, investigate the impact of population size on genetic variability and to evaluate the role of different environmental factors on local adaptation. Analyses of 72,846 SNPs supported a highly differentiated genetic structure, being the populations with the lowest population size (Porros, Foradada and Esclatasang islets) the most divergent, indicative of greater genetic drift. Outlier tests identified ~ 2% of loci as candidates for selection. Genomic divergence-Enviroment Association analyses were performed using redundancy analyses based on SNPs putatively under selection, detecting predation and human pressure as the environmental variables with the greatest explanatory power. Geographical distributions of populations and environmental factors appear to be fundamental drivers of divergence. These results support the combined role of genetic drift and divergent selection in shaping the genetic structure of these endemic island lizard populations.
format	article
author	Marta Bassitta Richard P. Brown Ana Pérez-Cembranos Valentín Pérez-Mellado José A. Castro Antònia Picornell Cori Ramon
author_facet	Marta Bassitta Richard P. Brown Ana Pérez-Cembranos Valentín Pérez-Mellado José A. Castro Antònia Picornell Cori Ramon
author_sort	Marta Bassitta
title	Genomic signatures of drift and selection driven by predation and human pressure in an insular lizard
title_short	Genomic signatures of drift and selection driven by predation and human pressure in an insular lizard
title_full	Genomic signatures of drift and selection driven by predation and human pressure in an insular lizard
title_fullStr	Genomic signatures of drift and selection driven by predation and human pressure in an insular lizard
title_full_unstemmed	Genomic signatures of drift and selection driven by predation and human pressure in an insular lizard
title_sort	genomic signatures of drift and selection driven by predation and human pressure in an insular lizard
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/364e5c53bd8c47a6a6b34c63879ed59d
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Genomic signatures of drift and selection driven by predation and human pressure in an insular lizard

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