Fraxinus excelsior
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA942609 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Transcriptome profiling of Fraxinus excelsior clones challenged by Emerald ash borer
| PRJDB15336 | ENA
Project description:A de novo 454-Illumina whole genome sequence for a self-pollinated progeny of a Fraxinus excelsior tree growing in woodland in Gloucestershire, UK
| PRJNA276010 | ENA
Project description:Fraxinus excelsior isolate:2451S Targeted Locus (Loci)
| PRJNA865134 | ENA
Project description:Fraxinus excelsior isolate:FRAX-001 Genome sequencing and assembly
| PRJNA713541 | ENA
Project description:Transforming ash genomics: a pan-genome resource for improved understanding of ash dieback resistance.
| PRJNA906474 | ENA
Project description:BackgroundKnowledge of genetic structure and the factors that shape it has an impact on forest management practices. European ash (Fraxinus excelsior L.) has declined dramatically throughout its range as a result of a disease caused by the fungus Hymenoscyphus fraxineus. Despite the need for conservation and restoration of the species, genetic data required to guide these efforts at the country level are scarce. Thereofore, we studied the chloroplast and nuclear genetic diversity of 26 natural common ash populations (1269 trees) in Poland.ResultsChloroplast polymorphisms grouped the populations into two geographically structured phylogenetic lineages ascribed to different glacial refugia (the Balkans and the Eastern Alps). However, the populations demonstrated high genetic diversity (mean AR = 12.35; mean Ho = 0.769; mean He = 0.542) but low differentiation based on nuclear microsatellites (FST = 0.045). Significant spatial genetic structure, consistent with models of isolation by distance, was detected in 14 out of 23 populations. Estimated effective population size was moderate-to-high, with a harmonic mean of 57.5 individuals per population.ConclusionsGenetic diversity was not homogeneously distributed among populations within phylogenetic gene pools, indicating that ash populations are not equal as potential sources of reproductive material. Genetic differences among populations could be related to their histories, including founder effects or gene flow between evolutionary lineages (admixture). Our results suggest that ash stands across Poland could be treated as two main management units (seed zones). Therefore, despite the homogenizing effect of pollen gene flow known for this species, the genetic structure should be taken into account in the management of the genetic resources of the common ash. Although ash dieback poses an additional challenge for the management of genetic resources, efforts should be directed towards protecting populations with high genetic diversity within defined phylogenetic units, as they may be an important source of adaptive variation for future stands.
| S-EPMC10935948 | biostudies-literature