ArticleScientific reports2016
Genetic structure of Populus hybrid zone along the Irtysh River provides insight into plastid-nuclear incompatibility.
Article in Scientific reports, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 21 citations in OpenAlex.
- Genomic Data Suggests Pathways of Modern White Poplar (Plants (Basel, Switzerland) · 2025Article
- Comparative Study on Growth Characteristics and Early Selection Efficiency of Hybrid Offspring ofPlants (Basel, Switzerland) · 2025Article
- Evolution of strong reproductive isolation in plants: broad-scale patterns and lessons from a perennial model group.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2020Article
- The protected tree Dimorphandra wilsonii (Fabaceae) is a population of inter-specific hybrids: recommendations for conservation in the Brazilian Cerrado/Atlantic Forest ecotone.Annals of botany · 2020Article
- Admixture mapping in interspecific Populus hybrids identifies classes of genomic architectures for phytochemical, morphological and growth traits.The New phytologist · 2019Article
- Hybridization, sex-specific genomic architecture and local adaptation.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2018Review
- Phylogeographic patterns of the desert poplar in Northwest China shaped by both geology and climatic oscillations.BMC evolutionary biology · 2018Article
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In plants, the maintenance of species integrity despite hybridization has often been explained by the co-adaption of nuclear gene complexes. However, the interaction between plastid and nuclear sub-genomes has been underestimated. Here, we analyzed the genetic structure of a Populus alba and P. tremula hybrid zone along the Irtysh River system in the Altai region, northwest China, using both nuclear microsatellites and plastid DNA sequences. We found high interspecific differentiation, although the hybrid P. × canescens was prevalent. Bayesian inference classified most hybrids into F1, followed by a few back-crosses to P. alba, and fewer F2 hybrids and back-crosses to P. tremula, indicating a few introgressions but preference toward P. alba. When plastid haplotypes in parental species were distinct, P. × canescens carried the haplotypes of both parents, but showed significant linkage between intraspecific haplotype and nuclear genotypes at several microsatellite loci. Selection, rather than migration and assortative mating, might have contributed to such plastid-nuclear disequilibria. By removing later-generated hybrids carrying interspecific combinations of haplotype and nuclear genotypes, plastid-nuclear incompatibility has greatly limited the gene exchange between P. alba and P. tremula via backcrossing with hybrids, demonstrating a significant association between plastid haplotype and the proportion of nuclear admixture.
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