Molecular signatures of divergence and selection in closely related pine taxa
Autor: | Stephen Cavers, Witold Wachowiak, Bartosz Łabiszak, Julia Zaborowska, Santiago C. González-Martínez, Giovanni M. Zucca, Annika Perry |
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Přispěvatelé: | Natural Environment Research Council (NERC), Institute of Dendrology, Polish Academy of Sciences, Adam Mickiewicz University in Poznań (UAM), Biodiversité, Gènes & Communautés (BioGeCo), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB), Polska Akademia Nauk = Polish Academy of Sciences (PAN) |
Rok vydání: | 2018 |
Předmět: |
0301 basic medicine
Nuclear gene [SDV]Life Sciences [q-bio] polymorphisme nucleotide polymorphisms nuclear loci mtDNA local adaptation DNA sequencing speciation Horticulture Biology Intraspecific competition Coalescent theory 03 medical and health sciences Pinus mugo Genetic variation Genetics Molecular Biology Local adaptation Haplotype Botany Forestry 15. Life on land biology.organism_classification modèle de coalescence spéciation 030104 developmental biology Genetic marker Evolutionary biology Original Article |
Zdroj: | Tree Genetics and Genomes Tree Genetics and Genomes, Springer Verlag, 2018, 14 (6), pp.1-11. ⟨10.1007/s11295-018-1296-3⟩ Tree Genetics & Genomes Tree Genetics and Genomes 6 (14), 1-11. (2018) |
ISSN: | 1614-2950 1614-2942 |
Popis: | Efforts to detect loci under selection in plants have mostly focussed on single species. However, assuming that intraspecific divergence may lead to speciation, comparisons of genetic variation within and among recently diverged taxa can help to locate such genes. In this study, coalescent and outlier detection methods were used to assess nucleotide polymorphism and divergence at 79 nuclear gene fragments (1212 SNPs) in 16 populations (153 individuals) of the closely related, but phenotypically and ecologically distinct, pine taxa Pinus mugo, P. uliginosa and P. uncinata across their European distributions. Simultaneously, mitochondrial DNA markers, which are maternally inherited in pines and distributed by seeds at short geographic distance, were used to assess genetic relationships of the focal populations and taxa. The majority of nuclear loci showed homogenous patterns of variation between the taxa due to a high number of shared SNPs and haplotypes, similar levels of polymorphism, and low net divergence. However, against this common genetic background and an overall low population structure within taxa at mitochondrial markers, we identified several genes showing signatures of selection, accompanied by significant intra- and interspecific divergence. Our results indicate that loci involved in species divergence may be involved in intraspecific local adaptation. Electronic supplementary material The online version of this article (10.1007/s11295-018-1296-3) contains supplementary material, which is available to authorized users. |
Databáze: | OpenAIRE |
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