Polyommatine Blue Butterflies Reveal Unexpected Integrity of the W Sex Chromosome Amid Extensive Chromosomal Fragmentation Linked to Telomere Restoration

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F25%3A00638864" target="_blank" >RIV/60077344:_____/25:00638864 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60076658:12310/25:43909903

Výsledek na webu

<a href="https://academic.oup.com/gbe/article-pdf/17/9/evaf157/64017775/evaf157.pdf" target="_blank" >https://academic.oup.com/gbe/article-pdf/17/9/evaf157/64017775/evaf157.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/gbe/evaf157" target="_blank" >10.1093/gbe/evaf157</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polyommatine Blue Butterflies Reveal Unexpected Integrity of the W Sex Chromosome Amid Extensive Chromosomal Fragmentation Linked to Telomere Restoration

Popis výsledku v původním jazyce

Chromosomal rearrangements act as barriers to gene flow and can thus promote speciation. In moths and butterflies (Lepidoptera), which possess holocentric chromosomes facilitating karyotype changes, chromosome fusions are more common than fissions. Yet, limited evidence suggests that when speciation involves chromosomal rearrangements, it is most often linked to fissions. Notable karyotypic variation is observed in three clades of the subfamily Polyommatinae (Lycaenidae), with chromosome numbers ranging from n = 10 to 225. We investigated genome sizes and karyotypes in several species of the genera Polyommatus and Lysandra with modal and derived high chromosome numbers. Our findings showed no support for polyploidy, confirming previous conclusions about karyotypic diversification via chromosome fragmentation in this butterfly family. Species with high chromosome numbers have slightly larger genomes, which indicate a potential role of repetitive sequences but contradict the hypothesis of holocentric drive. Ends of fragmented chromosomes were healed with telomeres synthesized de novo, which were significantly larger than those of species with modal karyotype. No interstitial telomeric sequences were detected on autosomes. Internal telomeric signals on sex chromosomes, however, revealed multiple sex chromosome systems in Polyommatus (Plebicula) dorylas and Polyommatus icarus, with two karyotype races differing in sex chromosome constitution in the latter. Notably, the W chromosome resisted fragmentation, presumably due to its epigenetic silencing.

Název v anglickém jazyce

Polyommatine Blue Butterflies Reveal Unexpected Integrity of the W Sex Chromosome Amid Extensive Chromosomal Fragmentation Linked to Telomere Restoration

Popis výsledku anglicky

Chromosomal rearrangements act as barriers to gene flow and can thus promote speciation. In moths and butterflies (Lepidoptera), which possess holocentric chromosomes facilitating karyotype changes, chromosome fusions are more common than fissions. Yet, limited evidence suggests that when speciation involves chromosomal rearrangements, it is most often linked to fissions. Notable karyotypic variation is observed in three clades of the subfamily Polyommatinae (Lycaenidae), with chromosome numbers ranging from n = 10 to 225. We investigated genome sizes and karyotypes in several species of the genera Polyommatus and Lysandra with modal and derived high chromosome numbers. Our findings showed no support for polyploidy, confirming previous conclusions about karyotypic diversification via chromosome fragmentation in this butterfly family. Species with high chromosome numbers have slightly larger genomes, which indicate a potential role of repetitive sequences but contradict the hypothesis of holocentric drive. Ends of fragmented chromosomes were healed with telomeres synthesized de novo, which were significantly larger than those of species with modal karyotype. No interstitial telomeric sequences were detected on autosomes. Internal telomeric signals on sex chromosomes, however, revealed multiple sex chromosome systems in Polyommatus (Plebicula) dorylas and Polyommatus icarus, with two karyotype races differing in sex chromosome constitution in the latter. Notably, the W chromosome resisted fragmentation, presumably due to its epigenetic silencing.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10603 - Genetics and heredity (medical genetics to be 3)

Projekt

<a href="/cs/project/GJ20-20650Y" target="_blank" >GJ20-20650Y: Časná evoluce neo-pohlavních chromozomů motýlů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Genome Biology and Evolution

ISSN

1759-6653

e-ISSN

1759-6653

Svazek periodika

17

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

evaf157

Kód UT WoS článku

001563821100001

EID výsledku v databázi Scopus

2-s2.0-105015218729