First Description of the Karyotype and Sex Chromosomes in the Komodo Dragon (Varanus komodoensis)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985904%3A_____%2F16%3A00467403" target="_blank" >RIV/67985904:_____/16:00467403 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/16:10329411

Result on the web

<a href="http://dx.doi.org/10.1159/000447340" target="_blank" >http://dx.doi.org/10.1159/000447340</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1159/000447340" target="_blank" >10.1159/000447340</a>

Result language

angličtina

Original language name

First Description of the Karyotype and Sex Chromosomes in the Komodo Dragon (Varanus komodoensis)

Original language description

The Komodo dragon (Varanus komodoensis) is the largest lizard in the world. Surprisingly, it has not yet been cytogenetically examined. Here, we present the very first description of its karyotype and sex chromosomes. The karyotype consists of 2n = 40 chromosomes, 16 macrochromosomes and 24 microchromosomes. Although the chromosome number is constant for all species of monitor lizards (family Varanidae) with the currently reported karyotype, variability in the morphology of the macrochromosomes has been previously documented within the group. We uncovered highly differentiated ZZ/ZW sex microchromosomes with a heterochromatic W chromosome in the Komodo dragon. Sex chromosomes have so far only been described in a few species of varanids including V. varius, the sister species to Komodo dragon, whose W chromosome is notably larger than that of the Komodo dragon. Accumulations of several microsatellite sequences in the W chromosome have recently been detected in 3 species of monitor lizards; however, these accumulations are absent from the W chromosome of the Komodo dragon. In conclusion, although varanids are rather conservative in karyotypes, their W chromosomes exhibit substantial variability at the sequence level, adding further evidence that degenerated sex chromosomes may represent the most dynamic genome part.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EG - Zoology

OECD FORD branch

—

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Cytogenetic and Genome Research

ISSN

1424-8581

e-ISSN

—

Volume of the periodical

148

Issue of the periodical within the volume

4

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

284-291

UT code for WoS article

000383706100007

EID of the result in the Scopus database

2-s2.0-84980367739