http://hdl.handle.net/20.500.12128/21589
Tytuł: | Descending dysploidy and bidirectional changes in genome size accompanied Crepis (Asteraceae) evolution |
Autor: | Senderowicz, Magdalena Nowak, Teresa Rojek-Jelonek, Magdalena Bisaga, Maciej Papp, Laszlo Weiss-Schneeweiss, Hanna Kolano, Bożena |
Słowa kluczowe: | chromosome number; karyotype formula; flow cytometry; genome size; phylogenetic analysis |
Data wydania: | 2021 |
Źródło: | "Genes" (2021), iss. 9, art. no. 1436, s. 1-24 |
Abstrakt: | 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 1 C = 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. |
URI: | http://hdl.handle.net/20.500.12128/21589 |
DOI: | 10.3390/genes12091436 |
ISSN: | 2073-4425 |
Pojawia się w kolekcji: | Książki/rozdziały (WNP) |
Plik | Opis | Rozmiar | Format | |
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Senderowicz_Descending_dysploidy_and_bidirectional_changes_in_genome_size.pdf | 2,42 MB | Adobe PDF | Przejrzyj / Otwórz |
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