2023
Conserved satellite DNA motif and lack of interstitial telomeric sites in highly rearranged African Nothobranchius killifish karyotypes
LUKSIKOVA, Karolina, Tomas PAVLICA, Marie ALTMANOVA, Jana STUNDLOVA, Sarka PELIKANOVA et. al.Základní údaje
Originální název
Conserved satellite DNA motif and lack of interstitial telomeric sites in highly rearranged African Nothobranchius killifish karyotypes
Autoři
LUKSIKOVA, Karolina, Tomas PAVLICA, Marie ALTMANOVA, Jana STUNDLOVA, Sarka PELIKANOVA, Sergey A SIMANOVSKY, Eugene Yu KRYSANOV, Marek JANKASEK, Matyas HIRMAN, Martin REICHARD (203 Česká republika, domácí), Petr RAB a Alexandr SEMBER (garant)
Vydání
Journal of Fish Biology, HOBOKEN, WILEY, 2023, 0022-1112
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10617 Marine biology, freshwater biology, limnology
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 2.000 v roce 2022
Kód RIV
RIV/00216224:14310/23:00132740
Organizační jednotka
Přírodovědecká fakulta
UT WoS
001070903200001
Klíčová slova anglicky
chromosome fusion; chromosome polymorphism; FISH; RepeatExplorer; repeatome; sex chromosome
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 30. 1. 2024 13:15, Mgr. Marie Šípková, DiS.
Anotace
V originále
Using African annual killifishes of the genus Nothobranchius from temporary savannah pools with rapid karyotype and sex chromosome evolution, we analysed the chromosomal distribution of telomeric (TTAGGG)(n) repeat and Nfu-SatC satellite DNA (satDNA; isolated from Nothobranchius furzeri) in 15 species across the Nothobranchius killifish phylogeny, and with Fundulosoma thierryi as an out-group. Our fluorescence in situ hybridization experiments revealed that all analysed taxa share the presence of Nfu-SatC repeat but with diverse organization and distribution on chromosomes. Nfu-SatC landscape was similar in conspecific populations of Nothobranchius guentheri and Nothobranchius melanospilus but slightly-to-moderately differed between populations of Nothobranchius pienaari, and between closely related Nothobranchius kuhntae and Nothobranchius orthonotus. Inter-individual variability in Nfu-SatC patterns was found in N. orthonotus and Nothobranchius krysanovi. We revealed mostly no sex-linked patterns of studied repetitive DNA distribution. Only in Nothobranchius brieni, possessing multiple sex chromosomes, Nfu-SatC repeat occupied a substantial portion of the neo-Y chromosome, similarly as formerly found in the XY sex chromosome system of turquoise killifish N. furzeri and its sister species Nothobranchius kadleci-representatives not closely related to N. brieni. All studied species further shared patterns of expected telomeric repeats at the ends of all chromosomes and no additional interstitial telomeric sites. In summary, we revealed (i) the presence of conserved satDNA class in Nothobranchius clades (a rare pattern among ray-finned fishes); (ii) independent trajectories of Nothobranchius sex chromosome differentiation, with recurrent and convergent accumulation of Nfu-SatC on the Y chromosome in some species; and (iii) genus-wide shared tendency to loss of telomeric repeats during interchromosomal rearrangements. Collectively, our findings advance our understanding of genome structure, mechanisms of karyotype reshuffling, and sex chromosome differentiation in Nothobranchius killifishes from the genus-wide perspective.