Population genetics and phylogeographic history of the insular lizardPodarcis lilfordi(Gunther, 1874) from the Balearic Islands based on genome-wide polymorphic data

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: March 7, 2024

Abstract Islands provide a great system to explore the processes that maintain genetic diversity and promote local adaptation. We explored genomic of Balearic lizard Podarcis lilfordi , an endemic species characterized by numerous small insular populations with large phenotypic diversity. Using newly available genome for this species, we more than 300,000 SNPs, merging Genotype Sequencing (GBS) data previously published Restriction-site associated DNA sequencing (RADSeq) data, providing dataset 16 island (191 individuals) across range distribution (Menorca, Mallorca, Cabrera). Results indicate each islet hosts well-differentiated population (Fst=0.247±0.09), no recent immigration/translocation events. Contrary expectations, most harbor considerable (mean nucleotide diversity, Pi=0.144±0.021), overall low inbreeding values (Fis<0.1). While significantly decreased decreasing surface, maintenance substantial even in tiny islets suggests variable selection or other mechanisms buffer drift. Maximum-likelihood tree based on concatenated SNP confirmed existence two major independent lineages Menorca Mallorca/Cabrera. Multiple lines evidence, including admixture root testing, robustly placed origin Mallorca Island, rather Menorca. Outlier analysis mainly retrieved strong signature differentiation between archipelagos, especially sexual chromosome Z. A set proteins were target multiple outliers primarily binding catalytic activity, interesting candidates future studies. This study provides framework crucial aspects basis divergence

Language: Английский

Population genetics and phylogeographic history of the insular lizard Podarcis lilfordi (Gunther, 1874) from the Balearic Islands based on genome-wide polymorphic data

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: April 16, 2024

Islands provide a great system to explore the processes that maintain genetic diversity and promote local adaptation. We explored genomic of Balearic lizard Podarcis lilfordi, an endemic species characterized by numerous small insular populations with large phenotypic diversity. Using newly available genome for this species, we more than 300,000 SNPs, merging Genotype Sequencing (GBS) data previously published Restriction-site associated DNA sequencing (RADSeq) data, providing dataset 16 island (191 individuals) across range distribution (Menorca, Mallorca, Cabrera). Results indicate each islet hosts well-differentiated population (Fst=0.2470.09), no recent immigration/translocation events. Contrary expectations, most harbor considerable (mean nucleotide diversity, Pi=0.1440.021), overall low inbreeding values (Fis<0.1). While significantly decreased decreasing surface, maintenance substantial even in tiny islets suggests variable selection or other mechanisms buffer drift. Maximum-likelihood tree based on concatenated SNP confirmed existence two major independent lineages Menorca Mallorca/Cabrera. Multiple lines evidence, including admixture root testing, robustly placed origin Mallorca Island, rather Menorca. Outlier analysis mainly retrieved strong signature differentiation between archipelagos, especially sexual chromosome Z. A set proteins were target multiple outliers primarily binding catalytic activity, interesting candidates future studies. This study provides framework crucial aspects basis divergence

Language: Английский