A bicontinental origin of polyploid Australian/New Zealand Lepidium species (Brassicaceae)? Evidence from genomic in situ hybridization
DC Element | Wert | Sprache |
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dc.contributor.author | Dierschke, Tom | |
dc.contributor.author | Mandakova, Terezie | |
dc.contributor.author | Lysak, Martin A. | |
dc.contributor.author | Mummenhoff, Klaus | |
dc.date.accessioned | 2021-12-23T16:07:07Z | - |
dc.date.available | 2021-12-23T16:07:07Z | - |
dc.date.issued | 2009 | |
dc.identifier.issn | 03057364 | |
dc.identifier.uri | https://osnascholar.ub.uni-osnabrueck.de/handle/unios/7717 | - |
dc.description.abstract | Incongruence between chloroplast and nuclear DNA phylogenies, and single additive nucleotide positions in internal transcribed spacer (ITS) sequences of polyploid Australian/New Zealand (NZ) Lepidium species have been used to suggest a bicontinental hybrid origin. This pattern was explained by two trans-oceanic dispersals of Lepidium species from California and Africa and subsequent hybridization followed by homogenization of the ribosomal DNA sequence either to the Californian (C-clade) or to the African ITS-type (A-clade) in two different ITS-lineages of Australian/NZ Lepidium polyploids. Genomic in situ hybridization (GISH) was used to unravel the genomic origin of polyploid Australian/NZ Lepidium species. Fluorescence in situ hybridization (FISH) with ribosomal DNA (rDNA) probes was applied to test the purported ITS evolution, and to facilitate chromosome counting in high-numbered polyploids. In Australian/NZ A-clade Lepidium polyploids, GISH identified African and Australian/NZ C-clade species as putative ancestral genomes. Neither the African nor the Californian genome were detected in Australian/NZ C-clade species and the Californian genome was not detected in Australian/NZ A-clade species. Five of the eight polyploid species (from 7x to 11x) displayed a diploid-like set of rDNA loci. Even the undecaploid species Lepidium muelleriferdinandi (2n = 11x = 88) showed only one pair of each rDNA repeat. In A-clade allopolyploids, in situ rDNA localization combined with GISH corroborated the presence of the African ITS-type. The nuclear genomes of African and Australian/NZ C-clade species were detected by GISH in allopolyploid Australian/NZ Lepidium species of the A-clade, supporting their hybrid origin. The presumed hybrid origin of Australian/NZ C-clade taxa could not be confirmed. Hence, it is assumed that Californian ancestral taxa experienced rapid radiation in Australia/NZ into extant C-clade polyploid taxa followed by hybridization with African species. As a result, A-clade allopolyploid Lepidium species share the Californian chloroplast type and the African ITS-type with the C-clade Australian/NZ polyploid and African diploid species, respectively. | |
dc.description.sponsorship | Grant Agency of the Czech Academy of ScienceGrant Agency of the Czech Republic [KJB601630606, IAA601630902]; Czech Ministry of EducationMinistry of Education, Youth & Sports - Czech Republic [MSM0021622415]; We thank all collectors and institutions for providing plant material, Ulrike Coja for technical assistance and Andreas Franzke and two anonymous reviewers for valuable comments. T.D. was supported by the DAAD (German Academic Exchange Service), and T. M. and M. A. L. were supported by research grants nos KJB601630606 and IAA601630902 from the Grant Agency of the Czech Academy of Science, and a grant from the Czech Ministry of Education (no. MSM0021622415). | |
dc.language.iso | en | |
dc.publisher | OXFORD UNIV PRESS | |
dc.relation.ispartof | ANNALS OF BOTANY | |
dc.subject | ALLOPOLYPLOID NICOTIANA | |
dc.subject | Australia | |
dc.subject | Brassicaceae | |
dc.subject | CRUCIFERAE | |
dc.subject | EVOLUTION | |
dc.subject | FISH | |
dc.subject | GISH | |
dc.subject | hybridization | |
dc.subject | ITS | |
dc.subject | Lepidium | |
dc.subject | long-distance dispersal | |
dc.subject | New Zealand | |
dc.subject | NUCLEAR RIBOSOMAL DNA | |
dc.subject | PHYLOGENY | |
dc.subject | Plant Sciences | |
dc.subject | polyploidy | |
dc.subject | RDNA | |
dc.subject | SEQUENCES | |
dc.subject | SYSTEMATICS | |
dc.title | A bicontinental origin of polyploid Australian/New Zealand Lepidium species (Brassicaceae)? Evidence from genomic in situ hybridization | |
dc.type | journal article | |
dc.identifier.doi | 10.1093/aob/mcp161 | |
dc.identifier.isi | ISI:000269195900008 | |
dc.description.volume | 104 | |
dc.description.issue | 4 | |
dc.description.startpage | 681 | |
dc.description.endpage | 688 | |
dc.contributor.orcid | 0000-0003-0318-4194 | |
dc.contributor.orcid | 0000-0001-6485-0563 | |
dc.contributor.orcid | 0000-0002-8449-1593 | |
dc.contributor.researcherid | D-7177-2012 | |
dc.contributor.researcherid | E-1365-2012 | |
dc.identifier.eissn | 10958290 | |
dc.publisher.place | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND | |
dcterms.isPartOf.abbreviation | Ann. Bot. | |
dcterms.oaStatus | Bronze, Green Published | |
crisitem.author.dept | FB 05 - Biologie/Chemie | - |
crisitem.author.deptid | fb05 | - |
crisitem.author.orcid | 0000-0002-8449-1593 | - |
crisitem.author.parentorg | Universität Osnabrück | - |
crisitem.author.netid | MuKl919 | - |
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geprüft am 18.05.2024