期刊论文详细信息
Genetics and Molecular Biology
Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae)
María A. Chemisquy1  Sergio G. Rodríguez Gil1  Cristina L. Scioscia1  Liliana M. Mola1 
关键词: meiosis;    C-banding;    fluorochrome staining;    karyotype;    spiders;    "Lycosa"and Schizocosa;   
DOI  :  10.1590/S1415-47572008005000022
来源: SciELO
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【 摘 要 】
Cytogenetic studies of the family Lycosidae (Arachnida: Araneae) are scarce. Less than 4% of the described species have been analyzed and the male haploid chromosome numbers ranged from 8+X 1X2to 13+X 1X2 . Species formerly classified asLycosawere the most studied ones. Our aim in this work was to perform a comparative analysis of the meiosis in " Lycosa "erythrognathaLucas, " Lycosa "pampeanaHolmberg andSchizocosa malitiosa(Tullgren). We also compared male and female karyotypes and characterized the heterochromatin of " L. "erythrognatha . The males of the three species had 2n = 22, n = 10+X 1 X 2 , all the chromosomes were telocentric and there was generally a single chiasma per bivalent. In " Lycosa "pampeana , which is described cytogenetically for the first time herein, the bivalents and sex chromosomes showed a clustered arrangement at prometaphase I. The comparison of the male/female karyotypes (2n = 22/24) of " Lycosa "erythrognatharevealed that the sex chromosomes were the largest of the complement and that the autosomes decreased gradually in size. The analysis of the amount, composition and distribution of heterochromatin with C-banding and staining with DAPI- and CMA 3- showed that " Lycosa "erythrognathahad little GC-rich heterochromatin in the pericentromeric region of all chromosomes. In addition, the actual occurrence of the genusLycosain the Southern Hemisphere is discussed.
【 授权许可】

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