Analyses of the Updated Animal rDNA Loci Database with an Emphasis on Its New Features

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F21%3A00554414" target="_blank" >RIV/68081707:_____/21:00554414 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1422-0067/22/21/11403" target="_blank" >https://www.mdpi.com/1422-0067/22/21/11403</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ijms222111403" target="_blank" >10.3390/ijms222111403</a>

Result language

angličtina

Original language name

Analyses of the Updated Animal rDNA Loci Database with an Emphasis on Its New Features

Original language description

We report on a major update to the animal rDNA loci database, which now contains cytogenetic information for 45S and 5S rDNA loci in more than 2600 and 1000 species, respectively. The data analyses show the following: (i) A high variability in 5S and 45S loci numbers, with both showing 50-fold or higher variability. However, karyotypes with an extremely high number of loci were rare, and medians generally converged to two 5S sites and two 45S rDNA sites per diploid genome. No relationship was observed between the number of 5S and 45S loci. (ii) The position of 45S rDNA on sex chromosomes was relatively frequent in some groups, particularly in arthropods (14% of karyotypes). Furthermore, 45S rDNA was almost exclusively located in microchromosomes when these were present (in birds and reptiles). (iii) The proportion of active NORs (positively stained with silver staining methods) progressively decreased with an increasing number of 45S rDNA loci, and karyotypes with more than 12 loci showed, on average, less than 40% of active loci. In conclusion, the updated version of the database provides some new insights into the organization of rRNA genes in chromosomes. We expect that its updated content will be useful for taxonomists, comparative cytogeneticists, and evolutionary biologists.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10608 - Biochemistry and molecular biology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

International Journal of Molecular Sciences

ISSN

1422-0067

e-ISSN

1422-0067

Volume of the periodical

22

Issue of the periodical within the volume

21

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

11403

UT code for WoS article

000718742100001

EID of the result in the Scopus database

2-s2.0-85117463385