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Genetic variability and morphology of tri- and tetraploid members of the Sorbus aria complex in northern Bavaria

Titelangaben

Feulner, Martin ; Weig, Alfons ; Paule, Juraj ; Gregor, Thomas ; Schott, Lea F. ; Aas, Gregor:
Genetic variability and morphology of tri- and tetraploid members of the Sorbus aria complex in northern Bavaria.
In: Preslia. Bd. 89 (2017) Heft 3 . - S. 275-290.
ISSN 0032-7786
DOI: 10.23855/preslia.2017.275

Abstract

The Sorbus aria complex in the Franconian Jura, northern Bavaria, consists of the sexual diploid S. aria s. str. and putative apomictic polyploids, among them S. collina and S. danubialis. Here, the genetic and cytotypic structure of the S. aria complex and the proportion of clonal versus variable genotypes with a special focus on S. collina are studied using nuclear microsatellite markers, flow cytometry and multivariate morphometrics. In the Franconian Jura the tetraploid S. collina is the most frequent taxon in the S. aria complex. It consists of six closely related clones and a high number of unique genotypes, which were found in 70% of the populations studied. Morphologically, most of the clones and the unique tetraploid genotypes are not significantly differentiated. Therefore, all of them could be assigned to S. collina. Mechanisms that could result in the high number of genotypes within S. collina are accumulations of mutations, remnant sexuality, multiple polyploidization events and backcrossing. The results show that S. collina is a genetically quite variable facultative apomictic taxon. Triploids were identified sporadically and the microsatellites pointed to an origin from repeated hybridization events between diploid S. aria s. str. and S. collina.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Serviceeinrichtungen > Ökologisch-Botanischer Garten
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Serviceeinrichtungen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 570 Biowissenschaften; Biologie
500 Naturwissenschaften und Mathematik > 580 Pflanzen (Botanik)
Eingestellt am: 11 Aug 2017 06:10
Letzte Änderung: 11 Aug 2017 06:10
URI: https://eref.uni-bayreuth.de/id/eprint/39087