Cytogenetic Analysis of Tegenaria elysii (Araneae: Agelenidae)

Abstract

There are 55 species of agelenid spiders in our country and the genus Tegenaria represents the widest group in terms of species number. In this study, it was aimed to investigate the cytogenetic properties of Tegenaria elysii species. Chromosomes were obtained by making some modifications to the method of Pekár and Král (2001). Hypotonic, fixation and staining steps were applied to the gonads respectively. As a result, the number of diploid chromosomes and the sex chromosome system were found as 2n=42, ♂X1X20/♀X1X1X2X2. Total relative lengths of chromosomes decreased gradually from 6,83% to 3,31%. Sex chromosomes which positive heteropycnotics in the stage of meiosis I have been detected to be isopycnic in the stage of meiosis II. 20 autosomal bivalent and two sex chromosomes were identified in which diplotene and diakinesis stages.