Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae)
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+X1X2 to 13+X1X2. Species formerly classified as Lycosa were the most studied ones. Our aim in this work was to p...
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todo:paper_14154757_v31_n4_p857_Chemisquy2023-10-03T16:13:09Z Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae) Chemisquy, M.A. Rodríguez Gil, S.G. Scioscia, C.L. Mola, L.M. "Lycosa" and Schizocosa C-banding Fluorochrome staining Karyotype Meiosis Spiders 4',6 diamidino 2 phenylindole animal genetics arachnid Argentina article autosome centromere chromosome analysis chromosome bivalent chromosome C band chromosome chiasm chromosome size controlled study female GC rich sequence heterochromatin karyotyping Lycosa erythrognatha Lycosa pampeana male meiosis nonhuman prometaphase Schizocosa malitiosa sex chromosome species comparison spider Arachnida Araneae Lycosa Lycosa erythrognatha Lycosidae Schizocosa 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+X1X2 to 13+X1X2. Species formerly classified as Lycosa were the most studied ones. Our aim in this work was to perform a comparative analysis of the meiosis in "Lycosa" erythrognatha Lucas, "Lycosa" pampeana Holmberg and Schizocosa 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+X1X2, 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" erythrognatha revealed 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 CMA3- showed that "Lycosa" erythrognatha had little GC-rich heterochromatin in the pericentromeric region of all chromosomes. In addition, the actual occurrence of the genus Lycosa in the Southern Hemisphere is discussed. Copyright © 2008, Sociedade Brasileira de Genética. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14154757_v31_n4_p857_Chemisquy |
| institution |
Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
"Lycosa" and Schizocosa C-banding Fluorochrome staining Karyotype Meiosis Spiders 4',6 diamidino 2 phenylindole animal genetics arachnid Argentina article autosome centromere chromosome analysis chromosome bivalent chromosome C band chromosome chiasm chromosome size controlled study female GC rich sequence heterochromatin karyotyping Lycosa erythrognatha Lycosa pampeana male meiosis nonhuman prometaphase Schizocosa malitiosa sex chromosome species comparison spider Arachnida Araneae Lycosa Lycosa erythrognatha Lycosidae Schizocosa |
| spellingShingle |
"Lycosa" and Schizocosa C-banding Fluorochrome staining Karyotype Meiosis Spiders 4',6 diamidino 2 phenylindole animal genetics arachnid Argentina article autosome centromere chromosome analysis chromosome bivalent chromosome C band chromosome chiasm chromosome size controlled study female GC rich sequence heterochromatin karyotyping Lycosa erythrognatha Lycosa pampeana male meiosis nonhuman prometaphase Schizocosa malitiosa sex chromosome species comparison spider Arachnida Araneae Lycosa Lycosa erythrognatha Lycosidae Schizocosa Chemisquy, M.A. Rodríguez Gil, S.G. Scioscia, C.L. Mola, L.M. Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae) |
| topic_facet |
"Lycosa" and Schizocosa C-banding Fluorochrome staining Karyotype Meiosis Spiders 4',6 diamidino 2 phenylindole animal genetics arachnid Argentina article autosome centromere chromosome analysis chromosome bivalent chromosome C band chromosome chiasm chromosome size controlled study female GC rich sequence heterochromatin karyotyping Lycosa erythrognatha Lycosa pampeana male meiosis nonhuman prometaphase Schizocosa malitiosa sex chromosome species comparison spider Arachnida Araneae Lycosa Lycosa erythrognatha Lycosidae Schizocosa |
| description |
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+X1X2 to 13+X1X2. Species formerly classified as Lycosa were the most studied ones. Our aim in this work was to perform a comparative analysis of the meiosis in "Lycosa" erythrognatha Lucas, "Lycosa" pampeana Holmberg and Schizocosa 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+X1X2, 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" erythrognatha revealed 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 CMA3- showed that "Lycosa" erythrognatha had little GC-rich heterochromatin in the pericentromeric region of all chromosomes. In addition, the actual occurrence of the genus Lycosa in the Southern Hemisphere is discussed. Copyright © 2008, Sociedade Brasileira de Genética. |
| format |
JOUR |
| author |
Chemisquy, M.A. Rodríguez Gil, S.G. Scioscia, C.L. Mola, L.M. |
| author_facet |
Chemisquy, M.A. Rodríguez Gil, S.G. Scioscia, C.L. Mola, L.M. |
| author_sort |
Chemisquy, M.A. |
| title |
Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae) |
| title_short |
Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae) |
| title_full |
Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae) |
| title_fullStr |
Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae) |
| title_full_unstemmed |
Cytogenetic studies of three Lycosidae species from Argentina (Arachnida, Araneae) |
| title_sort |
cytogenetic studies of three lycosidae species from argentina (arachnida, araneae) |
| url |
http://hdl.handle.net/20.500.12110/paper_14154757_v31_n4_p857_Chemisquy |
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1807322953728131072 |