Cytogenetic analysis of three Ctenidae species (Araneae) from the Amazon

Cytogenetic characterization was performed on three wandering spiders: Ctenus amphora Mello-Leitão, 1930, C. crulsi Mello-Leitão, 1930 and C. villasboasi Mello-Leitão, 1949. The three species had similar karyotypes, with 2n = 28 (26 + X(1)X(2)0) in males, with sex chromosomes exhibiting positive het...

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Autores principales: Pinto, José Paulo da Costa, Goll, Leonardo Gusso, Gross, Maria Claudia, Feldsberg, Eliana, Schneider, Carlos Henrique
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Sociedade Brasileira de Genética 2020
Materias:
Animal Genetics
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7678259/
https://www.ncbi.nlm.nih.gov/pubmed/33211059
http://dx.doi.org/10.1590/1678-4685-GMB-2020-0069
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author Pinto, José Paulo da Costa
Goll, Leonardo Gusso
Gross, Maria Claudia
Feldsberg, Eliana
Schneider, Carlos Henrique
author_facet Pinto, José Paulo da Costa
Goll, Leonardo Gusso
Gross, Maria Claudia
Feldsberg, Eliana
Schneider, Carlos Henrique
author_sort Pinto, José Paulo da Costa
collection PubMed
description Cytogenetic characterization was performed on three wandering spiders: Ctenus amphora Mello-Leitão, 1930, C. crulsi Mello-Leitão, 1930 and C. villasboasi Mello-Leitão, 1949. The three species had similar karyotypes, with 2n = 28 (26 + X(1)X(2)0) in males, with sex chromosomes exhibiting positive heteropicnosis in meiotic cells. 18S rDNA mapping revealed gene sites at the terminal region of one chromosomal pair for all species, with one C. crulsi individual, showing markings in two pairs. C. villasboasi showed markers only in the pachytene phase. The distribution pattern of constitutive heterochromatin was found to be characteristic for the genus, with markings in the centromeric region of all chromosomes, suggesting an acrocentric morphology for all chromosomes of the three analysed species. The results support the fusion of sex chromosomes as an evolutionary tendency for this spider group.
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spelling pubmed-76782592020-11-25 Cytogenetic analysis of three Ctenidae species (Araneae) from the Amazon Pinto, José Paulo da Costa Goll, Leonardo Gusso Gross, Maria Claudia Feldsberg, Eliana Schneider, Carlos Henrique Genet Mol Biol Animal Genetics Cytogenetic characterization was performed on three wandering spiders: Ctenus amphora Mello-Leitão, 1930, C. crulsi Mello-Leitão, 1930 and C. villasboasi Mello-Leitão, 1949. The three species had similar karyotypes, with 2n = 28 (26 + X(1)X(2)0) in males, with sex chromosomes exhibiting positive heteropicnosis in meiotic cells. 18S rDNA mapping revealed gene sites at the terminal region of one chromosomal pair for all species, with one C. crulsi individual, showing markings in two pairs. C. villasboasi showed markers only in the pachytene phase. The distribution pattern of constitutive heterochromatin was found to be characteristic for the genus, with markings in the centromeric region of all chromosomes, suggesting an acrocentric morphology for all chromosomes of the three analysed species. The results support the fusion of sex chromosomes as an evolutionary tendency for this spider group. Sociedade Brasileira de Genética 2020-11-16 /pmc/articles/PMC7678259/ /pubmed/33211059 http://dx.doi.org/10.1590/1678-4685-GMB-2020-0069 Text en Copyright © 2020, Sociedade Brasileira de Genética. https://creativecommons.org/licenses/by/4.0/ License information: This is an open-access article distributed under the terms of the Creative Commons Attribution License (type CC-BY), which permits unrestricted use, distribution and reproduction in any medium, provided the original article is properly cited.
spellingShingle Animal Genetics
Pinto, José Paulo da Costa
Goll, Leonardo Gusso
Gross, Maria Claudia
Feldsberg, Eliana
Schneider, Carlos Henrique
Cytogenetic analysis of three Ctenidae species (Araneae) from the Amazon
title Cytogenetic analysis of three Ctenidae species (Araneae) from the Amazon
title_full Cytogenetic analysis of three Ctenidae species (Araneae) from the Amazon
title_fullStr Cytogenetic analysis of three Ctenidae species (Araneae) from the Amazon
title_full_unstemmed Cytogenetic analysis of three Ctenidae species (Araneae) from the Amazon
title_short Cytogenetic analysis of three Ctenidae species (Araneae) from the Amazon
title_sort cytogenetic analysis of three ctenidae species (araneae) from the amazon
topic Animal Genetics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7678259/
https://www.ncbi.nlm.nih.gov/pubmed/33211059
http://dx.doi.org/10.1590/1678-4685-GMB-2020-0069
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