Titel:	Pleistocene dynamics of the Eurasian steppe as a driving force of evolution: Phylogenetic history of the genus Capsella (Brassicaceae)
Autor(en):	Čalasan, Anže Žerdoner Hurka, Herbert German, Dmitry A. Pfanzelt, Simon Blattner, Frank R. Seidl, Anna Neuffer, Barbara
ORCID des Autors:	https://orcid.org/0000-0003-2081-2076 https://orcid.org/0000-0001-7951-1644 https://orcid.org/0000-0001-7731-7741 https://orcid.org/0000-0002-7177-296X https://orcid.org/0000-0003-4971-9991
Zusammenfassung:	Capsella is a model plant genus of the Brassicaceae closely related to Arabidopsis. To disentangle its biogeographical history and intrageneric phylogenetic relationships, 282 individuals of all five currently recognized Capsella species were genotyped using a restriction digest-based next-generation sequencing method. Our analysis retrieved two main lineages within Capsella that split c. one million years ago, with western C. grandiflora and C. rubella forming a sister lineage to the eastern lineage consisting of C. orientalis. The split was attributed to continuous latitudinal displacements of the Eurasian steppe belt to the south during Early Pleistocene glacial cycles. During the interglacial cycles of the Late Pleistocene, hybridization of the two lineages took place in the southwestern East European Plain, leading to the allotetraploid C. bursa-pastoris. Extant genetic variation within C. orientalis postdated any extensive glacial events. Ecological niche modeling showed that suitable habitat for C. orientalis existed during the Last Glacial Maximum around the north coast of the Black Sea and in southern Kazakhstan. Such a scenario is also supported by population genomic data that uncovered the highest genetic diversity in the south Kazakhstan cluster, suggesting that C. orientalis originated in continental Asia and migrated north- and possibly eastwards after the last ice age. Post-glacial hybridization events between C. bursa-pastoris and C. grandiflora/rubella in the southwestern East European Plain and the Mediterranean gave rise to C. thracica. Introgression of C. grandiflora/rubella into C. bursa-pastoris resulted in a new Mediterranean cluster within the already existing Eurasian C. bursa-pastoris cluster. This study shows that the continuous displacement and disruption of the Eurasian steppe belt during the Pleistocene was the driving force in the evolution of Capsella.
Bibliografische Angaben:	Žerdoner Čalasan, A., Hurka, H., German, D. A., Pfanzelt, S., Blattner, F. R., Seidl, A., & Neuffer, B. (2021). Pleistocene dynamics of the Eurasian steppe as a driving force of evolution: Phylogenetic history of the genus Capsella (Brassicaceae). Ecology and Evolution, 11, 12697– 12713.
URL:	https://doi.org/10.48693/31 https://osnadocs.ub.uni-osnabrueck.de/handle/ds-202202045981
Schlagworte:	evolution; hybridization; introgression; refugium; shepherd's purse
Erscheinungsdatum:	18-Aug-2021
Lizenzbezeichnung:	Attribution 4.0 International
URL der Lizenz:	http://creativecommons.org/licenses/by/4.0/
Publikationstyp:	Einzelbeitrag in einer wissenschaftlichen Zeitschrift [article]
Enthalten in den Sammlungen:	FB05 - Hochschulschriften Open-Access-Publikationsfonds

Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons