20.500.12556/DiRROS-20243 The genetic consequences of population marginality a case study in maritime pine Aim: Marginal tree populations, either those located at the edges of the species' rangeor in suboptimal environments, are often a valuable genetic resource for biologicalconservation. However, there is a lack of knowledge about the genetic consequencesof population marginality, estimated across entire species' ranges. Our study ad-dresses this gap by providing information about several genetic indicators and theirvariability in marginal and core populations identified using quantitative marginalityindices.Location: Southwestern Europe and North Africa.Methods: Using 10,185 SNPs across 82 populations of maritime pine (Pinus pinasterAit.), a widespread conifer characterised by a fragmented range, we modelled therelationship of seven genetic indicators potentially related to population evolution-ary resilience, namely genetic diversity (based on both all SNPs and outlier SNPs),inbreeding, genetic differentiation, recessive genetic load and genomic offset, withpopulation geographical, demo-historical and ecological marginality (as estimated bynine quantitative indices). Models were constructed for both regional (introducinggene pool as a random factor) and range-wide spatial scales.Results: We showed a trend towards decreasing overall genetic diversity and increas-ing differentiation with geographic marginality, supporting the centre-periphery hy-pothesis (CPH). However, we found no correlation between population inbreedingand marginality, while geographically marginal populations had a lower recessive ge-netic load (only models without the gene pool effect). Ecologically marginal popula-tions had a higher genomic offset, suggesting higher maladaptation to future climate,albeit some of these populations also had high genetic diversity for climate outliers.Main Conclusions: Overall genetic diversity (but not outlier-based estimates) and dif-ferentiation patterns support the CPH. Ecologically marginal populations and those atthe southern edge could be more vulnerable to climate change due to higher climate maladaptation, as predicted by genomic offsets, and/or lower potentially adaptive ge-netic diversity. This risk is exacerbated by typically small effective population sizesand increasing human impact in marginal populations. population genetics conservation genetics marginal populations Pinus pinaster genetic indicators populacijska genetika konzervacijska genetika marginalne skupine obmorski bor genetski kazalci true false true Angleški jezik Slovenski jezik Neznano 2024-08-29 13:48:00 2024-08-29 13:48:00 2025-04-24 03:38:40 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 29. 8. 2024; Str. iss. Vol. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-01-01 630*16(045) 1472-4642 10.1111/ddi.13910 205778435 https://onlinelibrary.wiley.com/doi/10.1111/ddi.13910 1 cdb4469e-65eb-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28363 RAZ_Theraroz_Adelaide_2024.pdf RAZ_Theraroz_Adelaide_2024.pdf 1 VoR 0FF6C5EFB3B506D4795DA0DF1C6A1850 4bb95366244b610c84aaa348216b9a0eeee170b29deb3b3a933f8d261207b646 f9dc9729-2018-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=31921 Gozdarski inštitut Slovenije 0 0 0