J 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.