Germline-restricted chromosome shows remarkable variation in size among closely related passerine species

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985904%3A_____%2F22%3A00556703" target="_blank" >RIV/67985904:_____/22:00556703 - isvavai.cz</a>

Alternative codes found

RIV/68081766:_____/22:00556703 RIV/00216208:11310/22:10447255 RIV/61988987:17310/22:A2302JX1

Result on the web

<a href="https://link.springer.com/article/10.1007/s00412-022-00771-6" target="_blank" >https://link.springer.com/article/10.1007/s00412-022-00771-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00412-022-00771-6" target="_blank" >10.1007/s00412-022-00771-6</a>

Result language

angličtina

Original language name

Germline-restricted chromosome shows remarkable variation in size among closely related passerine species

Original language description

Passerine birds have a supernumerary chromosome in their germ cells called the germline-restricted chromosome (GRC). The GRC was first discovered more than two decades ago in zebra finch but recent studies have suggested that it is likely present in all passerines, the most species rich avian order, encompassing more than half of all modern bird species. Despite its wide taxonomic distribution, studies on this chromosome are still scarce and limited to a few species. Here, we cytogenetically analyzed the GRC in five closely related estrildid finch species of the genus Lonchura. We show that the GRC varies enormously in size, ranging from a tiny micro-chromosome to one of the largest macro-chromosomes in the cell, not only among recently diverged species but also within species and sometimes even between germ cells of a single individual. In Lonchura atricapilla, we also observed variation in GRC copy number among male germ cells of a single individual. Finally, our analysis of hybrids between two Lonchura species with noticeably different GRC size directly supported maternal inheritance of the GRC. Our results reveal the extraordinarily dynamic nature of the GRC, which might be caused by frequent gains and losses of sequences on this chromosome leading to substantial differences in genetic composition of the GRC between and even within species. Such differences might theoretically contribute to reproductive isolation between species and thus accelerate the speciation rate of passerine birds compared to other bird lineages.

Czech name

—

Czech description

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Type

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

CEP classification

—

OECD FORD branch

10602 - Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology

Project

<a href="/en/project/GA20-23794S" target="_blank" >GA20-23794S: Germline restricted chromosome in songbirds: understanding its origin, function and evolutionary significance</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Chromosoma

ISSN

0009-5915

e-ISSN

1432-0886

Volume of the periodical

131

Issue of the periodical within the volume

1-2

Country of publishing house

DE - GERMANY

Number of pages

10

Pages from-to

77-86

UT code for WoS article

000779612200001

EID of the result in the Scopus database

2-s2.0-85127644711