Alex Widmer
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View article: Genomic identification of direct seeding and evolutionary lineages by combining heterogeneous genomic resources
Genomic identification of direct seeding and evolutionary lineages by combining heterogeneous genomic resources Open
Background Human-induced habitat changes threaten biodiversity, prompting large-scale restoration initiatives. Revegetation through direct seeding is common in agricultural and infrastructure construction projects, yet the provenance of se…
View article: Euclid preparation. Methodology for validating the Euclid Catalogue of Galaxy Clusters using external data
Euclid preparation. Methodology for validating the Euclid Catalogue of Galaxy Clusters using external data Open
We present our methodology for identifying known clusters as counterparts to objects in the Euclid Catalogue of Galaxy Clusters (ECGC). Euclid is expected to detect a large number of optically-selected galaxy clusters over the approximatel…
View article: Adaptation of protein stability to thermally heterogeneous environments
Adaptation of protein stability to thermally heterogeneous environments Open
Proper protein folding is essential for biological function, and its disruption can lead to disease, reduced fitness, or death. The ability of a protein to maintain its folded conformation is thus critical for life, making it a key target …
View article: Herbarium digitisation sheds light on historical distribution and drivers of population extinction of a peat bog specialist
Herbarium digitisation sheds light on historical distribution and drivers of population extinction of a peat bog specialist Open
Societal Impact Statement Biodiversity loss threatens ecosystem services and human well‐being. Understanding the extent and causes of changes in biodiversity over time can help protect species and their habitats. Herbaria house carefully d…
View article: Soil heterogeneity and pleiotropy contribute to polygenic soil adaptation during postglacial range expansion in an alpine plant
Soil heterogeneity and pleiotropy contribute to polygenic soil adaptation during postglacial range expansion in an alpine plant Open
Summary 1) Plants colonized new abiotic environments during postglacial range expansions. Little is known about whether populations adapt to different soil conditions during range expansion and, if so, which mechanisms underlie presumably …
View article: Adaptation of protein stability to thermally heterogeneous environments
Adaptation of protein stability to thermally heterogeneous environments Open
Proper protein folding is essential for biological function, and its disruption can lead to disease, reduced fitness, or death. The ability of a protein to maintain its folded conformation is thus critical for life, making it a key target …
View article: Early Life History Divergence Mediates Elevational Adaptation in a Perennial Alpine Plant
Early Life History Divergence Mediates Elevational Adaptation in a Perennial Alpine Plant Open
Spatially divergent natural selection can drive adaptation to contrasting environments and thus the evolution of ecotypes. In perennial plants, selection shapes life history traits by acting on subsequent life stages, each contributing to …
View article: Unravelling drivers of local adaptation through evolutionary functional–structural plant modelling
Unravelling drivers of local adaptation through evolutionary functional–structural plant modelling Open
Summary Local adaptation to contrasting environmental conditions along environmental gradients is a widespread phenomenon in plant populations, yet we lack a mechanistic understanding of how individual agents of selection contribute to thi…
View article: Early sex identification by leaflet distance in plantlets of Cycas revoluta
Early sex identification by leaflet distance in plantlets of Cycas revoluta Open
In dioecious plants, the process of sex determination usually occurs during the reproductive stage. However, it can be challenging to determine the sex of long-lived plants with long generation times. This is true for Cycas revoluta , whic…
View article: Detecting directional epistasis and dominance from cross-line analyses in alpine populations of <i>Arabidopsis thaliana</i>
Detecting directional epistasis and dominance from cross-line analyses in alpine populations of <i>Arabidopsis thaliana</i> Open
The contribution of non-additive genetic effects to the genetic architecture of fitness and to the evolutionary potential of populations has been a topic of theoretical and empirical interest for a long time. Yet, the empirical study of th…
View article: Trait evolution linked to climatic shifts contributes to adaptive divergence in an alpine carnation (<i>Dianthus sylvestris</i>)
Trait evolution linked to climatic shifts contributes to adaptive divergence in an alpine carnation (<i>Dianthus sylvestris</i>) Open
Populations expanding to new habitats may encounter novel selection regimes which can lead to ecotype formation. In the Alps, elevation corresponds to steep ecological gradients, along which ecotype formation has occurred in many species. …
View article: Life history traits mediate elevational adaptation in a perennial alpine plant
Life history traits mediate elevational adaptation in a perennial alpine plant Open
Summary Spatially divergent natural selection drives adaptation to contrasting environments and the evolution of ecotypes. Understanding this process in perennial plants is challenging because natural selection acts on multiple life histor…
View article: Evolution of sex-biased gene expression during transitions to separate sexes in the<i>Silene</i>genus
Evolution of sex-biased gene expression during transitions to separate sexes in the<i>Silene</i>genus Open
Sexual dimorphism is widespread among species with separate sexes and its extent is thought to be governed by the differential expression of thousands of genes between males and females (known as Sex-Biased Genes, hereafter SBGs). SBGs hav…
View article: UV RESISTANCE LOCUS 8–Mediated UV-B Response Is Required Alongside CRYPTOCHROME 1 for Plant Survival in Sunlight under Field Conditions
UV RESISTANCE LOCUS 8–Mediated UV-B Response Is Required Alongside CRYPTOCHROME 1 for Plant Survival in Sunlight under Field Conditions Open
As sessile, photoautotrophic organisms, plants are subjected to fluctuating sunlight that includes potentially detrimental ultraviolet-B (UV-B) radiation. Experiments under controlled conditions have shown that the UV-B photoreceptor UV RE…
View article: Sequential colonization events with restricted gene flow in a widespread European carnation species
Sequential colonization events with restricted gene flow in a widespread European carnation species Open
The key questions relating to the evolutionary processes underlying plant colonization success pertain to the geographic origin of the source population(s), the location of the migration routes, the extent to which genetic diversity is red…
View article: Population genomics and epigenomics provide insights into the evolution of facultative asexuality in plants
Population genomics and epigenomics provide insights into the evolution of facultative asexuality in plants Open
Many organisms, particularly plants, can reproduce both sexually and asexually but with varying frequencies. Because variations in the reproductive system profoundly affect fitness and genomic diversity, natural selection should act on cha…
View article: Sequential colonization events with restricted gene flow in a widespread European carnation species
Sequential colonization events with restricted gene flow in a widespread European carnation species Open
The key questions relating to the evolutionary processes underlying plant colonization success pertain to the geographic origin of the source population(s), the location of the migration routes, the extent to which genetic diversity is red…
View article: Population genomics and epigenomics provide insights into the evolution of facultative asexuality in plants
Population genomics and epigenomics provide insights into the evolution of facultative asexuality in plants Open
Summary Many organisms, particularly plants, are facultatively asexual. Because asexual reproduction is beneficial for the short term but costly for the long term, during the range expansion, natural selection should act on the genetic con…
View article: Detecting directional epistasis and dominance from cross-line analyses in alpine populations of<i>Arabidopsis thaliana</i>
Detecting directional epistasis and dominance from cross-line analyses in alpine populations of<i>Arabidopsis thaliana</i> Open
The contribution of non-additive genetic effects to the genetic architecture of fitness, and to the evolutionary potential of populations, has been a topic of theoretical and empirical interest for a long time. Yet, the empirical study of …
View article: Experimental warming increases the vulnerability of high‐elevation plant populations to a specialist herbivore
Experimental warming increases the vulnerability of high‐elevation plant populations to a specialist herbivore Open
Ongoing climate change may impact alpine plant populations via both direct effects of increased temperature and climate‐driven changes in interactions between plants and other organisms, such as insect herbivores. Rates of herbivory in hig…
View article: Genomic evidence for rapid speciation and gene flow between sympatric carnivorous<i>Nepenthes</i>pitcher plants
Genomic evidence for rapid speciation and gene flow between sympatric carnivorous<i>Nepenthes</i>pitcher plants Open
Speciation can result from both neutral and adaptive processes, but their relative importance and the factors exerting selective pressures are incompletely understood. In theory, interspecific gene flow could suffice to reverse speciation,…
View article: Adaptive evolution of carnivory in<i>Nepenthes</i>pitcher plants: a comparative transcriptomics and proteomics perspective
Adaptive evolution of carnivory in<i>Nepenthes</i>pitcher plants: a comparative transcriptomics and proteomics perspective Open
While trait diversity associated with evolutionary radiations is easily recognized, their function and adaptive relevance often remain elusive. Here we study the evolution of carnivory genes in Nepenthes , an iconic radiation of carnivorou…
View article: Unravelling drivers of local adaptation through Evolutionary Functional-Structural Plant modelling
Unravelling drivers of local adaptation through Evolutionary Functional-Structural Plant modelling Open
Summary Local adaptation to contrasting environmental conditions along environmental gradients is a widespread phenomenon in plant populations, yet we lack a mechanistic understanding of how individual agents of selection contribute to loc…
View article: Taxonomic Studies on Malagasy <i>Dalbergia</i> (Fabaceae). III. Two New Species from Southeastern Madagascar and an Emended Description of the Rosewood Species <i>Dalbergia maritima</i>
Taxonomic Studies on Malagasy <i>Dalbergia</i> (Fabaceae). III. Two New Species from Southeastern Madagascar and an Emended Description of the Rosewood Species <i>Dalbergia maritima</i> Open
— The Malagasy rosewood species Dalbergia maritima has a long history of unsustainable exploitation for its beautiful, burgundy-colored heartwood. As currently circumscribed, D. maritima has a wide geographic distribution in eastern Madaga…