Hörandl, Elvira

[["dc.bibliographiccitation.artnumber","1111"],["dc.bibliographiccitation.journal","Frontiers in Plant Science"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Barke, Birthe H."],["dc.contributor.author","Daubert, Mareike"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2019-07-09T11:45:43Z"],["dc.date.available","2019-07-09T11:45:43Z"],["dc.date.issued","2018"],["dc.description.abstract","Hybridization and polyploidization play important roles in plant evolution but it is still not fully clarified how these evolutionary forces contribute to the establishment of apomicts. Apomixis, the asexual reproduction via seed formation, comprises several essential alterations in development compared to the sexual pathway. Furthermore, most natural apomicts were found to be polyploids and/or hybrids. The Ranunculus auricomus complex comprises diploid sexual and polyploid apomictic species and represents an excellent model system to gain knowledge on origin and evolution of apomixis in natural plant populations. In this study, the second generation of synthetically produced homoploid (2x) and heteroploid (3x) hybrids derived from sexual R. auricomus species was analyzed for aposporous initial cell formation by DIC microscopy. Complete manifestation of apomixis was determined by measuring single mature seeds by flow cytometric seed screen. Microscopic analysis of the female gametophyte formation indicated spontaneous occurrence of aposporous initial cells and several developmental irregularities. The frequency of apospory was found to depend on dosage effects since a significant increase in apospory was observed, when both F1 parents, rather than just one, were aposporous. Other than in the F1 generation, diploid Ranunculus F2 hybrids formed BIII seeds and fully apomictic seeds. The results indicate that hybridization rather than polyploidization seems to be the functional activator of apomictic reproduction in the synthetic Ranunculus hybrids. In turn, at least two hybrid generations are required to establish apomictic seed formation."],["dc.identifier.doi","10.3389/fpls.2018.01111"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15296"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59296"],["dc.language.iso","en"],["dc.notes.intern","DeepGreen Import"],["dc.publisher","Frontiers Media S.A."],["dc.relation.eissn","1664-462X"],["dc.relation.issn","1664-462X"],["dc.rights","http://creativecommons.org/licenses/by/4.0/"],["dc.subject.ddc","570"],["dc.title","Establishment of Apomixis in Diploid F2 Hybrids and Inheritance of Apospory From F1 to F2 Hybrids of the Ranunculus auricomus Complex"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","13881"],["dc.bibliographiccitation.issue","22"],["dc.bibliographiccitation.journal","International Journal of Molecular Sciences"],["dc.bibliographiccitation.volume","23"],["dc.contributor.affiliation","Paetzold, Claudia; 1Department of Botany and Molecular Evolution, Senckenberg Research Institute, 60325 Frankfurt am Main, Germany"],["dc.contributor.affiliation","Barke, Birthe H.; 2Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Goettingen, 37073 Goettingen, Germany"],["dc.contributor.affiliation","Hörandl, Elvira; 2Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Goettingen, 37073 Goettingen, Germany"],["dc.contributor.author","Paetzold, Claudia"],["dc.contributor.author","Barke, Birthe H."],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2022-12-07T15:52:31Z"],["dc.date.available","2022-12-07T15:52:31Z"],["dc.date.issued","2022-11-10"],["dc.date.updated","2022-12-07T13:05:31Z"],["dc.description.abstract","Hybridisation in plants may cause a shift from sexual to asexual seed formation (apomixis). Indeed, natural apomictic plants are usually hybrids, but it is still unclear how hybridisation could trigger the shift to apomixis. The genome evolution of older apomictic lineages is influenced by diverse processes such as polyploidy, mutation accumulation, and allelic sequence divergence. To disentangle the effects of hybridisation from these other factors, we analysed the transcriptomes of flowering buds from artificially produced, diploid F2 hybrids of the Ranunculus auricomus complex. The hybrids exhibited unreduced embryo sac formation (apospory) as one important component of apomixis, whereas their parental species were sexual. We revealed 2915 annotated single-copy genes that were mostly under purifying selection according to dN/dS ratios. However, pairwise comparisons revealed, after rigorous filtering, 79 genes under diversifying selection between hybrids and parents, whereby gene annotation assigned ten of them to reproductive processes. Four genes belong to the meiosis-sporogenesis phase (ASY1, APC1, MSP1, and XRI1) and represent, according to literature records, candidate genes for apospory. We conclude that hybridisation could combine novel (or existing) mutations in key developmental genes in certain hybrid lineages, and establish (together with altered gene expression profiles, as observed in other studies) a heritable regulatory mechanism for aposporous development."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft"],["dc.description.sponsorship","Ursula Hofmann Foundation of the University of Goettingen"],["dc.identifier.doi","10.3390/ijms232213881"],["dc.identifier.pii","ijms232213881"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/118477"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-621"],["dc.relation.eissn","1422-0067"],["dc.rights","CC BY 4.0"],["dc.title","Evolution of Transcriptomes in Early-Generation Hybrids of the Apomictic Ranunculus auricomus Complex (Ranunculaceae)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","BMC Plant Biology"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Barke, Birthe H."],["dc.contributor.author","Karbstein, Kevin"],["dc.contributor.author","Daubert, Mareike"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2021-04-14T08:32:19Z"],["dc.date.available","2021-04-14T08:32:19Z"],["dc.date.issued","2020"],["dc.description.sponsorship","Open-Access-Publikationsfonds 2021"],["dc.identifier.doi","10.1186/s12870-020-02654-3"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17658"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83881"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.notes.intern","Merged from goescholar"],["dc.relation.eissn","1471-2229"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","The relation of meiotic behaviour to hybridity, polyploidy and apomixis in the Ranunculus auricomus complex (Ranunculaceae)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1082"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Taxon"],["dc.bibliographiccitation.lastpage","1092"],["dc.bibliographiccitation.volume","67"],["dc.contributor.author","Hodač, Ladislav"],["dc.contributor.author","Barke, Birthe H."],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2020-12-10T18:41:56Z"],["dc.date.available","2020-12-10T18:41:56Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.12705/676.6"],["dc.identifier.issn","0040-0262"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77737"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Mendelian segregation of leaf phenotypes in experimental F 2 hybrids elucidates origin of morphological diversity of the apomictic Ranunculus auricomus complex"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]