Cross-species chromosome painting and repetitive DNA mapping illuminate the karyotype evolution in true crocodiles (Crocodylidae)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985904%3A_____%2F23%3A00574834" target="_blank" >RIV/67985904:_____/23:00574834 - isvavai.cz</a>
Alternative codes found
RIV/68081766:_____/23:00574834 RIV/00216208:11310/23:10474854 RIV/00023272:_____/23:10136374
Result on the web
<a href="https://asep.lib.cas.cz/arl-cav/cs/csg/?repo=crepo1&key=22784988069" target="_blank" >https://asep.lib.cas.cz/arl-cav/cs/csg/?repo=crepo1&key=22784988069</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00412-023-00806-6" target="_blank" >10.1007/s00412-023-00806-6</a>
Alternative languages
Result language
angličtina
Original language name
Cross-species chromosome painting and repetitive DNA mapping illuminate the karyotype evolution in true crocodiles (Crocodylidae)
Original language description
Crocodilians have maintained very similar karyotype structures and diploid chromosome numbers for around 100 million years, with only minor variations in collinearity. Why this karyotype structure has largely stayed unaltered for so long is unclear. In this study, we analyzed the karyotypes of six species belonging to the genera Crocodylus and Osteolaemus (Crocodylidae, true crocodiles), among which the Congolian endemic O. osborni was included and investigated. We utilized various techniques (differential staining, fluorescence in situ hybridization with repetitive DNA and rDNA probes, whole chromosome painting, and comparative genomic hybridization) to better understand how crocodile chromosomes evolved. We studied representatives of three of the four main diploid chromosome numbers found in crocodiles (2n = 30/32/38). Our data provided new information about the species studied, including the identification of four major chromosomal rearrangements that occurred during the karyotype diversification process in crocodiles. These changes led to the current diploid chromosome numbers of 2n = 30 (fusion) and 2n = 38 (fissions), derived from the ancestral state of 2n = 32. The conserved cytogenetic tendency in crocodilians, where extant species keep near-ancestral state, contrasts with the more dynamic karyotype evolution seen in other major reptile groups.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10613 - Zoology
Result continuities
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
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chromosoma
ISSN
0009-5915
e-ISSN
1432-0886
Volume of the periodical
132
Issue of the periodical within the volume
4
Country of publishing house
DE - GERMANY
Number of pages
15
Pages from-to
289-303
UT code for WoS article
001034210900001
EID of the result in the Scopus database
2-s2.0-85165694088