Universität zu Köln

Enke, N., Kunze, R., Pustahija, F., Gloeckner, G., Zimmermann, J., Oberlaender, J., Kamari, G. and Siljak-Yakovlev, S. (2015). Genome size shifts: karyotype evolution in Crepis section Neglectoides (Asteraceae). Plant Biol., 17 (4). S. 775 - 787. HOBOKEN: WILEY. ISSN 1438-8677

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Abstract

Plant genome size evolution is a very dynamic process: the ancestral genome of angiosperms was initially most likely small, which led to a tendency towards genome increase during evolution. However, findings in several angiosperm lineages demonstrate mechanisms that also led to genome size contraction. Recent molecular investigations on the Asteraceae genus Crepis suggest that several genomic reduction events have occurred during the evolution of the genus. This study focuses on the Mediterranean Crepis sect. Neglectoides, which includes three species with some of the smallest genomes within the whole genus. Crepis neglecta has the largest genome in sect. Neglectoides, approximately twice the size of the two species Crepis cretica and Crepis hellenica. Whereas C.cretica and C.hellencia are more closely related to each other than to C.neglecta the karyotypes of the latter species and C.cretica are similar, while that of C.hellenica differs considerably. Here, the karyotypic organisation of the three species is investigated with fluorescence in-situ hybridisation and studied in a molecular phylogenetic framework based on the nuclear markers Actin, CHR12, CPN60B, GPCR1 and XTH23. Our findings further corroborate the occurrence of genome size contraction in Crepis, and suggest that the difference in genome size between C.neglecta and C.cretica is mostly due to elimination of dispersed repetitive elements, whereas chromosomal reorganisation was involved in the karyotype formation of C.hellenica.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Enke, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kunze, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pustahija, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gloeckner, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zimmermann, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Oberlaender, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kamari, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Siljak-Yakovlev, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-399904
DOI:	10.1111/plb.12318
Journal or Publication Title:	Plant Biol.
Volume:	17
Number:	4
Page Range:	S. 775 - 787
Date:	2015
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1438-8677
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COPY NUCLEAR GENES; PHYLOGENETIC ANALYSES; MAXIMUM-LIKELIHOOD; DNA-CONTENT; HETEROCHROMATIN; CICHORIEAE; PRAEMORSA; SEQUENCES; ALIGNMENT; INSIGHTS Multiple languages Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39990