Data on the the molecular and quantitative genetic variation within and between populations of the declining grassland species Saxifraga granulata

Name: Data on the the molecular and quantitative genetic variation within and between populations of the declining grassland species Saxifraga granulata
Creator: Musée national d'histoire naturelle Luxembourg
License: https://creativecommons.org/publicdomain/zero/1.0/
Keywords: climatic-distances,diversifying-selection,evolutionary-potential,evolvability,formerly-common-species,genetic-drift,heritability,isolation-by-distance,molecular-genetic-variation,pairwise-qst,qst-vs-fst,quantitative-genetic-variation,recent-fragmentation,saxifraga-granulata

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Data files of molecular RAPD profiles and quantitative (morphological) traits of Saxifraga granulata populations

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Musée national d'histoire naturelle Luxembourg

Dernière mise à jour

20 janvier 2026

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Creative Commons Zero (CC0)

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56.0%

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Molecular and quantitative genetic variation within and between populations of the declining grassland species Saxifraga granulata

Mis à jour le 20 janvier 2026

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URL: https://datadryad.org/dataset/doi:10.5061/dryad.b8gtht7g5
URL stable: https://data.public.lu/fr/datasets/r/3e8ab289-cec6-4ba4-ac3d-c47aac899d0f
Type MIME: None

Créé le: 20 janvier 2026
Modifiée le: 20 janvier 2026

Dataset used for a study on molecular and quantitative genetic variation within and between populations of the declining grassland species.

Abstract of article: Formerly common plant species are expected to be particularly susceptible to recent habitat fragmentation. We studied the population genetics of 19 recently fragmented Saxifraga granulata populations (max. distance 61 km) in Luxembourg and neighbouring Germany using RAPD markers and a common garden experiment. We assessed (1) the relationships between plant fitness, quantitative genetic variation, molecular genetic variation and population size, and (2) the relative importance of genetic drift and selection in shaping genetic variation. Molecular genetic diversity was high but did not correlate with population size, habitat conditions or with plant performance. Genetic differentiation was low (FST = 0.079 ± 0.135) and there was no isolation by distance. Longevity, clonality and the long-lived seed bank of S. granulata may have prevented strong genetic erosion and genetic differentiation among populations. However, genetic distinctness increased with decreasing genetic diversity indicating that random genetic drift occurred in the studied populations. Quantitative and molecular genetic variation were correlated and their differentiation (QST vs. FST) among S. granulata populations was similar, suggesting that mainly random processes have shaped the quantitative genetic differentiation among populations. However, pairwise quantitative genetic distances increased with geographic and climatic distances, even when adjusted for molecular genetic distances, indicating diversifying selection. Our results indicate that long-lived clonal species may be buffered at least temporarily against the negative effects of fragmentation. The relationship between quantitative genetic and geographic distance may be a more sensitive indicator of selection than QST - FST differences.

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Publié le 20 janvier 2026 par Musée national d'histoire naturelle Luxembourg

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Creative Commons Zero (CC0)

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696f4918aa2d482996d682a2

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20 janvier 2026

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20 janvier 2026

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Data on the the molecular and quantitative genetic variation within and between populations of the declining grassland species Saxifraga granulata

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