Eur. J. Entomol. 118: 192-199, 2021�|�DOI:�10.14411/eje.2021.020

Blattodea Karyotype DatabaseOriginal article

Marek JANK�SEK ORCID...1, Zuzana KOTYKOV� VARAD�NOV� ORCID...1, 2, Franti�ek ���HLAVSK� ORCID...1
1 Department of Zoology, Faculty of Science, Charles University, Vini�n� 7, 128 44 Praha 2, Czech Republic; e-mails: [email protected], [email protected], [email protected]
2 Department of Zoology, National Museum, V�clavsk� n�m�st� 68, 115 79 Praha 1, Czech Republic

We present an open (publicly available) and updatable database of the karyotypes of Blattodea which is available at http://web.natur.cuni.cz/zoologie/arthropods/blattodeadatabase/index.html. This database currently contains data on chromosome numbers and sex chromosome systems for 355 (209 cockroaches and 146 termites) cytogenetically and/or geographically distinct populations of 229 species (138 cockroaches and 91 termites). When available, data on chromosome morphology and fundamental number are also included. As this summary of the data on Blattodea cytogenetics follows current taxonomy and phylogeny it enabled us to discuss hypotheses on karyotype evolution. We also point out some cytogenetically interesting phenomena such as extensive karyotype differentiation at low taxonomic levels in some lineages and the change from the X0 sex chromosome system, which is present in cockroaches, to systems with multiple neo-sex chromosomes, present in termites. We encourage the use of modern cytogenetic methods in research on Blattodea cytogenetics to uncover more detailed mechanisms of karyotype evolution in this insect order. We also provide a brief summary of the history of cytogenetic research in Blattodea.

Keywords: Blattodea, Isoptera, cockroach, termite, chromosome number, karyotype, meiosis, sex chromosome system, online database

Received: December 31, 2020; Revised: May 26, 2021; Accepted: May 26, 2021; Published online: July 2, 2021� Show citation

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JANK�SEK, M., KOTYKOV� VARAD�NOV�, Z., & ���HLAVSK�, F. (2021). Blattodea Karyotype Database. EJE,�118,�Article 192-199. https://doi.org/10.14411/eje.2021.020
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