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Article

Descending Dysploidy and Bidirectional Changes in Genome Size Accompanied Crepis (Asteraceae) Evolution

1
Faculty of Natural Sciences, Institute of Biology, Biotechnology and Environmental Protection, University of Silesia in Katowice, 40-007 Katowice, Poland
2
Eötvös Loránd University Botanical Garden, Illés u. 25, 1083 Budapest, Hungary
3
Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, A-1030 Vienna, Austria
*
Author to whom correspondence should be addressed.
Academic Editor: Mario Ventura
Genes 2021, 12(9), 1436; https://doi.org/10.3390/genes12091436
Received: 27 August 2021 / Revised: 13 September 2021 / Accepted: 14 September 2021 / Published: 17 September 2021
(This article belongs to the Section Cytogenomics)
The evolution of the karyotype and genome size was examined in species of Crepis sensu lato. The phylogenetic relationships, inferred from the plastid and nrITS DNA sequences, were used as a framework to infer the patterns of karyotype evolution. Five different base chromosome numbers (x = 3, 4, 5, 6, and 11) were observed. A phylogenetic analysis of the evolution of the chromosome numbers allowed the inference of x = 6 as the ancestral state and the descending dysploidy as the major direction of the chromosome base number evolution. The derived base chromosome numbers (x = 5, 4, and 3) were found to have originated independently and recurrently in the different lineages of the genus. A few independent events of increases in karyotype asymmetry were inferred to have accompanied the karyotype evolution in Crepis. The genome sizes of 33 Crepis species differed seven-fold and the ancestral genome size was reconstructed to be 1C = 3.44 pg. Both decreases and increases in the genome size were inferred to have occurred within and between the lineages. The data suggest that, in addition to dysploidy, the amplification/elimination of various repetitive DNAs was likely involved in the genome and taxa differentiation in the genus. View Full-Text
Keywords: chromosome number; karyotype formula; flow cytometry; genome size; phylogenetic analysis chromosome number; karyotype formula; flow cytometry; genome size; phylogenetic analysis
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MDPI and ACS Style

Senderowicz, M.; Nowak, T.; Rojek-Jelonek, M.; Bisaga, M.; Papp, L.; Weiss-Schneeweiss, H.; Kolano, B. Descending Dysploidy and Bidirectional Changes in Genome Size Accompanied Crepis (Asteraceae) Evolution. Genes 2021, 12, 1436. https://doi.org/10.3390/genes12091436

AMA Style

Senderowicz M, Nowak T, Rojek-Jelonek M, Bisaga M, Papp L, Weiss-Schneeweiss H, Kolano B. Descending Dysploidy and Bidirectional Changes in Genome Size Accompanied Crepis (Asteraceae) Evolution. Genes. 2021; 12(9):1436. https://doi.org/10.3390/genes12091436

Chicago/Turabian Style

Senderowicz, Magdalena, Teresa Nowak, Magdalena Rojek-Jelonek, Maciej Bisaga, Laszlo Papp, Hanna Weiss-Schneeweiss, and Bozena Kolano. 2021. "Descending Dysploidy and Bidirectional Changes in Genome Size Accompanied Crepis (Asteraceae) Evolution" Genes 12, no. 9: 1436. https://doi.org/10.3390/genes12091436

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