Cytogenetics of entelegyne spiders (Arachnida, Araneae) from southern Africa

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F20%3A10409878" target="_blank" >RIV/00216208:11310/20:10409878 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=bhle52DwCK" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=bhle52DwCK</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3897/CompCytogen.v14i1.48667" target="_blank" >10.3897/CompCytogen.v14i1.48667</a>

Result language

angličtina

Original language name

Cytogenetics of entelegyne spiders (Arachnida, Araneae) from southern Africa

Original language description

Spiders represent one of the most studied arachnid orders. They are particularly intriguing from a cytogenetic point of view, due to their complex and dynamic sex chromosome determination systems. Despite intensive research on this group, cytogenetic data from African spiders are still mostly lacking. In this study, we describe the karyotypes of 38 species of spiders belonging to 16 entelegyne families from South Africa and Namibia. In the majority of analysed families, the observed chromosome numbers and morphology (mainly acrocentric) did not deviate from the family-level cytogenetic characteristics based on material from other continents: Tetragnathidae (2n male = 24), Ctenidae and Oxyopidae (2n male = 28), Sparassidae (2n male = 42), Gnaphosidae, Trachelidae and Trochanteriidae (2n male = 22), and Salticidae (2n male = 28). On the other hand, we identified interspecific variability within Hersiliidae (2n male = 33 and 35), Oecobiidae (2n male = 19 and 25), Selenopidae (2n male = 26 and 29) and Theridiidae (2n male = 21 and 22). We examined the karyotypes of Ammoxenidae and Gallieniellidae for the first time. Their diploid counts (2n male = 22) correspond to the superfamily Gnaphosoidea and support their placement in this lineage. On the other hand, the karyotypes of Prodidominae (2n male = 28 and 29) contrast with all other Gnaphosoidea. Similarly, the unusually high diploid number in Borboropactus sp. (2n male = 28) within the otherwise cytogenetically uniform family Thomisidae (mainly 2n male = 21-24) supports molecular data suggesting a basal position of the genus in the family. The implementation of FISH methods for visualisation of rDNA clusters facilitated the detection of complex dynamics of numbers of these loci. We identified up to five loci of the 18S rDNA clusters in our samples. Three different sex chromosome systems (X0, X(1)X(2)0 and X(1)X(2)X(3)0) were also detected among the studied taxa.

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

10613 - Zoology

Project

<a href="/en/project/GA16-10298S" target="_blank" >GA16-10298S: Origin and evolution of sex chromosomes in spiders</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

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

Name of the periodical

Comparative Cytogenetics

ISSN

1993-0771

e-ISSN

—

Volume of the periodical

14

Issue of the periodical within the volume

1

Country of publishing house

RU - RUSSIAN FEDERATION

Number of pages

32

Pages from-to

107-138

UT code for WoS article

000518398700002

EID of the result in the Scopus database

—