Capturing neutral and adaptive genetic diversity for conservation in a highly structured tree species.

Détails

ID Serval
serval:BIB_239FA59DF440
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Capturing neutral and adaptive genetic diversity for conservation in a highly structured tree species.
Périodique
Ecological Applications
Auteur(s)
Rodríguez-Quilón I., Santos-Del-Blanco L., Serra-Varela M.J., Koskela J., González-Martínez S.C., Alía R.
ISSN
1051-0761 (Print)
ISSN-L
1051-0761
Statut éditorial
Publié
Date de publication
2016
Volume
26
Numéro
7
Pages
2254-2266
Langue
anglais
Résumé
Preserving intraspecific genetic diversity is essential for long-term forest sustainability in a climate change scenario. Despite that, genetic information is largely neglected in conservation planning, and how conservation units should be defined is still heatedly debated. Here, we use maritime pine (Pinus pinaster Ait.), an outcrossing long-lived tree with a highly fragmented distribution in the Mediterranean biodiversity hotspot, to prove the importance of accounting for genetic variation, of both neutral molecular markers and quantitative traits, to define useful conservation units. Six gene pools associated to distinct evolutionary histories were identified within the species using 12 microsatellites and 266 single nucleotide polymorphisms (SNPs). In addition, height and survival standing variation, their genetic control, and plasticity were assessed in a multisite clonal common garden experiment (16 544 trees). We found high levels of quantitative genetic differentiation within previously defined neutral gene pools. Subsequent cluster analysis and post hoc trait distribution comparisons allowed us to define 10 genetically homogeneous population groups with high evolutionary potential. They constitute the minimum number of units to be represented in a maritime pine dynamic conservation program. Our results uphold that the identification of conservation units below the species level should account for key neutral and adaptive components of genetic diversity, especially in species with strong population structure and complex evolutionary histories. The environmental zonation approach currently used by the pan-European genetic conservation strategy for forest trees would be largely improved by gradually integrating molecular and quantitative trait information, as data become available.
Mots-clé
conservation genetics, dynamic conservation, microsatellites, phenotypic plasticity, Pinus pinaster, quantitative genetic differentiation, single nucleotide polymorphisms (SNP)
Pubmed
Web of science
Création de la notice
11/11/2016 10:10
Dernière modification de la notice
03/03/2018 14:55
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