Cytogenetics of the Javan file snake (Acrochordus javanicus) and the evolution of snake sex chromosomes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10385269" target="_blank" >RIV/00216208:11310/18:10385269 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985904:_____/18:00488580

Výsledek na webu

<a href="https://doi.org/10.1111/jzs.12180" target="_blank" >https://doi.org/10.1111/jzs.12180</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jzs.12180" target="_blank" >10.1111/jzs.12180</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cytogenetics of the Javan file snake (Acrochordus javanicus) and the evolution of snake sex chromosomes

Popis výsledku v původním jazyce

Advanced snakes (Caenophidia) are an important group including around 90% of the recent species of snakes. The basal splitting of the clade is still rather controversial, and it is not fully understood when the differentiation of sex chromosomes started in snake evolution. To help resolve these questions, we performed cytogenetic analysis on the Javan file snake, also known as the elephant trunk snake (Acrochordus javanicus) from the family Acrochordidae, which occupies an informative phylogenetic position. For the first time for acrochordids, we identified heteromorphic ZZ/ZW sex chromosomes with a highly heterochromatic W chromosome. These traits are likely synapomorphies of advanced snakes. In contrast to other caenophidian snakes, the Javan file snake lacks an accumulation of Bkm repeats and interstitial telomeric repeats on the W chromosome. This observation supports the sister group relationship between acrochordids and all other caenophidian snakes including the family Xenodermatidae and questions the suggested role of Bkm repeats in the formation of sex heterochromatin in snakes. The revealed partial gene content of the Z chromosome in acrochordids supports the hypothesis that the progressive degeneration of the W chromosome commenced in snakes before the basal split of Caenophidia, albeit its evolutionary rate in file snakes might be slower than in their sister lineage.

Název v anglickém jazyce

Cytogenetics of the Javan file snake (Acrochordus javanicus) and the evolution of snake sex chromosomes

Popis výsledku anglicky

Advanced snakes (Caenophidia) are an important group including around 90% of the recent species of snakes. The basal splitting of the clade is still rather controversial, and it is not fully understood when the differentiation of sex chromosomes started in snake evolution. To help resolve these questions, we performed cytogenetic analysis on the Javan file snake, also known as the elephant trunk snake (Acrochordus javanicus) from the family Acrochordidae, which occupies an informative phylogenetic position. For the first time for acrochordids, we identified heteromorphic ZZ/ZW sex chromosomes with a highly heterochromatic W chromosome. These traits are likely synapomorphies of advanced snakes. In contrast to other caenophidian snakes, the Javan file snake lacks an accumulation of Bkm repeats and interstitial telomeric repeats on the W chromosome. This observation supports the sister group relationship between acrochordids and all other caenophidian snakes including the family Xenodermatidae and questions the suggested role of Bkm repeats in the formation of sex heterochromatin in snakes. The revealed partial gene content of the Z chromosome in acrochordids supports the hypothesis that the progressive degeneration of the W chromosome commenced in snakes before the basal split of Caenophidia, albeit its evolutionary rate in file snakes might be slower than in their sister lineage.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10613 - Zoology

Projekt

<a href="/cs/project/GJ17-22141Y" target="_blank" >GJ17-22141Y: Evoluce pohlavních chromozomů plazů skupiny Toxicofera</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Zoological Systematics and Evolutionary Research

ISSN

0947-5745

e-ISSN

—

Svazek periodika

56

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

117-125

Kód UT WoS článku

000419657600008

EID výsledku v databázi Scopus

2-s2.0-85040374008