Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes
Theridiidae is a derived family within the Araneoidea clade. In contrast to closely related groups, the 2n(male) = 20+X1X2 with acro/telocentric chromosomes is the most widespread karyotype among the theridiid spiders. In this work, the cytogenetic analysis of Argyrodes elevatus revealed original ch...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Genética
2010-01-01
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| Series: | Genetics and Molecular Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400012 |
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| author | Leila Miguel Stavale Marielle Cristina Schneider Douglas Araujo Antonio Domingos Brescovit Doralice Maria Cella |
| author_facet | Leila Miguel Stavale Marielle Cristina Schneider Douglas Araujo Antonio Domingos Brescovit Doralice Maria Cella |
| author_sort | Leila Miguel Stavale |
| collection | DOAJ |
| description | Theridiidae is a derived family within the Araneoidea clade. In contrast to closely related groups, the 2n(male) = 20+X1X2 with acro/telocentric chromosomes is the most widespread karyotype among the theridiid spiders. In this work, the cytogenetic analysis of Argyrodes elevatus revealed original chromosome features different from those previously registered for Theridiidae, including the presence of 2n(male) = 20+X with meta/submetacentric chromosomes. Most individuals of Nesticodes rufipes showed family conserved karyotype characteristics. However, one individual had a 2n(male) = 24 due to the presence of an extra chromosome pair, which exhibited regular behavior and reductional segregation during meiosis. After silver staining, mitotic cells exhibited NORs localized on the terminal regions of the short arms of pairs 2, 3, and 4 of A. elevatus and on the terminal regions of long arms of pair 4 of N. rufipes. The comparative analysis with data from phylogenetically related species allowed the clarification of the origin of the interspecific and intraspecific chromosome variability observed in Argyrodes and in N. rufipes, respectively. |
| first_indexed | 2024-12-22T02:41:23Z |
| format | Article |
| id | doaj.art-ba7da0b7d8644c62a3518984e903268a |
| institution | Directory Open Access Journal |
| issn | 1415-4757 1678-4685 |
| language | English |
| last_indexed | 2024-12-22T02:41:23Z |
| publishDate | 2010-01-01 |
| publisher | Sociedade Brasileira de Genética |
| record_format | Article |
| series | Genetics and Molecular Biology |
| spelling | doaj.art-ba7da0b7d8644c62a3518984e903268a2022-12-21T18:41:38ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1415-47571678-46852010-01-01334663668Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipesLeila Miguel StavaleMarielle Cristina SchneiderDouglas AraujoAntonio Domingos BrescovitDoralice Maria CellaTheridiidae is a derived family within the Araneoidea clade. In contrast to closely related groups, the 2n(male) = 20+X1X2 with acro/telocentric chromosomes is the most widespread karyotype among the theridiid spiders. In this work, the cytogenetic analysis of Argyrodes elevatus revealed original chromosome features different from those previously registered for Theridiidae, including the presence of 2n(male) = 20+X with meta/submetacentric chromosomes. Most individuals of Nesticodes rufipes showed family conserved karyotype characteristics. However, one individual had a 2n(male) = 24 due to the presence of an extra chromosome pair, which exhibited regular behavior and reductional segregation during meiosis. After silver staining, mitotic cells exhibited NORs localized on the terminal regions of the short arms of pairs 2, 3, and 4 of A. elevatus and on the terminal regions of long arms of pair 4 of N. rufipes. The comparative analysis with data from phylogenetically related species allowed the clarification of the origin of the interspecific and intraspecific chromosome variability observed in Argyrodes and in N. rufipes, respectively.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400012chromosome morphologycytogeneticmeiosisnucleolar organizer regionsex chromosome system |
| spellingShingle | Leila Miguel Stavale Marielle Cristina Schneider Douglas Araujo Antonio Domingos Brescovit Doralice Maria Cella Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes Genetics and Molecular Biology chromosome morphology cytogenetic meiosis nucleolar organizer region sex chromosome system |
| title | Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes |
| title_full | Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes |
| title_fullStr | Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes |
| title_full_unstemmed | Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes |
| title_short | Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes |
| title_sort | chromosomes of theridiidae spiders entelegynae interspecific karyotype diversity in argyrodes and diploid number intraspecific variability in nesticodes rufipes |
| topic | chromosome morphology cytogenetic meiosis nucleolar organizer region sex chromosome system |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400012 |
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