Hörandl, Elvira

[["dc.bibliographiccitation.artnumber","976765"],["dc.bibliographiccitation.journal","Frontiers in Plant Science"],["dc.bibliographiccitation.volume","13"],["dc.contributor.affiliation","He, Li; 1Eastern China Conservation Centre for Wild Endangered Plant Resources, Shanghai Chenshan Botanical Garden, Shanghai, China"],["dc.contributor.affiliation","Hörandl, Elvira; 2Department of Systematics, Biodiversity and Evolution of Plants, University of Göttingen, Göttingen, Germany"],["dc.contributor.author","He, Li"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2022-12-01T08:31:35Z"],["dc.date.available","2022-12-01T08:31:35Z"],["dc.date.issued","2022"],["dc.date.updated","2022-11-11T13:12:56Z"],["dc.description.abstract","Dioecy is rare in flowering plants (5–6% of species), but is often controlled genetically by sex-linked regions (SLRs). It has so far been unclear whether, polyploidy affects sex chromosome evolution, as it does in animals, though polyploidy is quite common in angiosperms, including in dioecious species. Plants could be different, as, unlike many animal systems, degenerated sex chromosomes, are uncommon in plants. Here we consider sex determination in plants and plant-specific factors, and propose that constraints created at the origin of polyploids limit successful polyploidization of species with SLRs. We consider the most likely case of a polyploid of a dioecious diploid with an established SLR, and discuss the outcome in autopolyploids and allopolyploids. The most stable system possibly has an SLR on just one chromosome, with a strongly dominant genetic factor in the heterogametic sex (e.g., xxxY male in a tetraploid). If recombination occurs with its homolog, this will prevent Y chromosome degeneration. Polyploidy may also allow for reversibility of multiplied Z or X chromosomes into autosomes. Otherwise, low dosage of Y-linked SLRs compared to their multiple homologous x copies may cause loss of reliable sex-determination at higher ploidy levels. We discuss some questions that can be studied using genome sequencing, chromosome level-assemblies, gene expression studies and analysis of loci under selection."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2022"],["dc.identifier.doi","10.3389/fpls.2022.976765"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/118209"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-621"],["dc.publisher","Frontiers Media S.A."],["dc.relation.eissn","1664-462X"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Does polyploidy inhibit sex chromosome evolution in angiosperms?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Frontiers in Plant Science"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Wagner, Natascha D."],["dc.contributor.author","He, Li"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2021-04-14T08:23:49Z"],["dc.date.available","2021-04-14T08:23:49Z"],["dc.date.issued","2020"],["dc.description.abstract","Polyploidy is common in the genus Salix. However, little is known about the origin, parentage and genomic composition of polyploid species because of a lack of suitable molecular markers and analysis tools. We established a phylogenomic framework including species of all described sections of Eurasian shrub willows. We analyzed the genomic composition of seven polyploid willow species in comparison to putative diploid parental species to draw conclusions on their origin and the effects of backcrossing and post-origin evolution. We applied recently developed programs like SNAPP, HyDe, and SNiPloid to establish a bioinformatic pipeline for unravelling the complexity of polyploid genomes. RAD sequencing revealed 23,393 loci and 320,010 high quality SNPs for the analysis of relationships of 35 species of Eurasian shrub willows (Salix subg. Chamaetia/Vetrix). Polyploid willow species appear to be predominantly of allopolyploid origin. More ancient allopolyploidization events were observed for two hexaploid and one octoploid species, while our data suggested a more recent allopolyploid origin for the included tetraploids and identified putative parental taxa. SNiPloid analyses disentangled the different genomic signatures resulting from hybrid origin, backcrossing, and secondary post-origin evolution in the polyploid species. Our RAD sequencing data demonstrate that willow genomes are shaped by ancient and recent reticulate evolution, polyploidization, and post-origin divergence of species."],["dc.identifier.doi","10.3389/fpls.2020.01077"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/81060"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.publisher","Frontiers Media S.A."],["dc.relation.eissn","1664-462X"],["dc.rights","http://creativecommons.org/licenses/by/4.0/"],["dc.title","Phylogenomic Relationships and Evolution of Polyploid Salix Species Revealed by RAD Sequencing Data"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","146"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Diversity"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Wagner, Natascha D."],["dc.contributor.author","He, Li"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2021-06-01T09:42:34Z"],["dc.date.available","2021-06-01T09:42:34Z"],["dc.date.issued","2021"],["dc.description.abstract","The genus Salix (willows), with 33 species, represents the most diverse genus of woody plants in the European Alps. Many species dominate subalpine and alpine types of vegetation. Despite a long history of research on willows, the evolutionary and ecological factors for this species richness are poorly known. Here we will review recent progress in research on phylogenetic relationships, evolution, ecology, and speciation in alpine willows. Phylogenomic reconstructions suggest multiple colonization of the Alps, probably from the late Miocene onward, and reject hypotheses of a single radiation. Relatives occur in the Arctic and in temperate Eurasia. Most species are widespread in the European mountain systems or in the European lowlands. Within the Alps, species differ ecologically according to different elevational zones and habitat preferences. Homoploid hybridization is a frequent process in willows and happens mostly after climatic fluctuations and secondary contact. Breakdown of the ecological crossing barriers of species is followed by introgressive hybridization. Polyploidy is an important speciation mechanism, as 40% of species are polyploid, including the four endemic species of the Alps. Phylogenomic data suggest an allopolyploid origin for all taxa analyzed so far. Further studies are needed to specifically analyze biogeographical history, character evolution, and genome evolution of polyploids."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft"],["dc.description.sponsorship","Open-Access-Publikationsfonds 2021"],["dc.identifier.doi","10.3390/d13040146"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17850"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85285"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.notes.intern","Merged from goescholar"],["dc.relation.eissn","1424-2818"],["dc.relation.orgunit","Abteilung Systematik, Biodiversität und Evolution der Pflanzen (mit Herbarium)"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","The Evolutionary History, Diversity, and Ecology of Willows (Salix L.) in the European Alps"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]