Počet záznamů: 1
Conserved sex chromosomes and karyotype evolution in monitor lizards (Varanidae)
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SYSNO ASEP 0511995 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Conserved sex chromosomes and karyotype evolution in monitor lizards (Varanidae) Tvůrce(i) Iannucci, A. (IT)
Altmanová, Marie (UZFG-Y) ORCID
Ciofi, C. (IT)
Ferguson-Smith, M. A. (GB)
Milan, M. (IT)
Pereira, J. (PT)
Pether, J. (ES)
Řehák, I. (CZ)
Rovatsos, Michail (UZFG-Y) ORCID
Stanyon, R. (IT)
Velenský, P. (CZ)
Ráb, Petr (UZFG-Y) RID, ORCID
Kratochvíl, L. (CZ)
Johnson Pokorná, Martina (UZFG-Y) ORCIDZdroj.dok. Heredity - ISSN 0018-067X
Roč. 123, č. 2 (2019), s. 215-227Poč.str. 13 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Varanidae ; sex chromosomes Vědní obor RIV EB - Genetika a molekulární biologie Obor OECD Genetics and heredity (medical genetics to be 3) Způsob publikování Omezený přístup Institucionální podpora UZFG-Y - RVO:67985904 UT WOS 000474747800011 EID SCOPUS 85060539870 DOI 10.1038/s41437-018-0179-6 Anotace Despite their long history with the basal split dating back to the Eocene, all species of monitor lizards (family Varanidae) studied so far share the same chromosome number of 2n = 40. However, there are differences in the morphology of the macrochromosome pairs 5-8. Further, sex determination, which revealed ZZ/ZW sex microchromosomes, was studied only in a few varanid species and only with techniques that did not test their homology. The aim of this study was to (i) test if cryptic interchromosomal rearrangements of larger chromosomal blocks occurred during the karyotype evolution of this group, (ii) contribute to the reconstruction of the varanid ancestral karyotype, and (iii) test homology of sex chromosomes among varanids. We investigated these issues by hybridizing flow sorted chromosome paints from Varanus komodoensis to metaphases of nine species of monitor lizards. The results show that differences in the morphology of the chromosome pairs 5-8 can be attributed to intrachromosomal rearrangements, which led to transitions between acrocentric and metacentric chromosomes in both directions. We also documented the first case of spontaneous triploidy among varanids in Varanus albigularis. The triploid individual was fully grown, which demonstrates that polyploidization is compatible with life in this lineage. We found that the W chromosome differs between species in size and heterochromatin content. The varanid Z chromosome is clearly conserved in all the analyzed species. Varanids, in addition to iguanas, caenophidian snakes, and lacertid lizards, are another squamate group with highly conserved sex chromosomes over a long evolutionary time. Pracoviště Ústav živočišné fyziologie a genetiky Kontakt Jana Zásmětová, knihovna@iapg.cas.cz, Tel.: 315 639 554 Rok sběru 2020 Elektronická adresa https://asep.lib.cas.cz/arl-cav/cs/csg/?repo=crepo1&key=43770151593
Počet záznamů: 1