Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera)
Triatoma sordida and T. guasayana are competent Trypanosoma cruzi vectors, with overlapping distribution areas in Argentina. Both species are morphologically similar, and their immature stages are hard to discriminate. Cytogenetic studies in the genus Triatoma reveal scarce karyotypic variations, be...
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1998
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v93_n3_p309_Rebagliati http://hdl.handle.net/20.500.12110/paper_00740276_v93_n3_p309_Rebagliati |
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paper:paper_00740276_v93_n3_p309_Rebagliati2023-06-08T15:06:57Z Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera) Rebagliati, Pablo Javier Papeschi, Alba Graciela Mola, Liliana Maria Pietrokovsky, Silvia Monica Wisnivesky Colli, María Cristina Heteroptera Holokinetic chromosomes Meiotic behaviour Meiotic karyotype Triatoma Heteroptera Reduviidae Triatoma guasayana Triatoma sordida Trypanosoma Trypanosoma cruzi animal Argentina article chromosome map classification comparative study cytology genetics karyotyping male meiosis sex chromosome spermatogenesis Triatoma Triatominae Animals Argentina Chromosome Mapping Karyotyping Male Meiosis Sex Chromosomes Spermatogenesis Triatoma Triatominae Triatoma sordida and T. guasayana are competent Trypanosoma cruzi vectors, with overlapping distribution areas in Argentina. Both species are morphologically similar, and their immature stages are hard to discriminate. Cytogenetic studies in the genus Triatoma reveal scarce karyotypic variations, being 2n= 20 + XY the most frequent diploid number in males. In the present work the meiotic behaviour of different Argentinian populations of T. sordida and T. guasayana has been analyzed; the meiotic karyotype of both species has also been compared. The species differ in total chromosome area and in the relative area of the sex chromosomes. These meiotic karyotypic differences constitute an additional tool for the taxonomic characterization of T. sordida and T. guasayana. The analysis of an interpopulation hybrid of T. sordida (Brazil x Argentina) reveals a regular meiotic behaviour, despite the presence of heteromorphic bivalents. Our observations support the hypothesis that karyotype variations through the gain or loss of heterochromatin can not be considered as a primary mechanism of reproductive isolation in Triatoma. Fil:Rebagliati, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Papeschi, A.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mola, L.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pietrokovsky, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Wisnivesky-Colli, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v93_n3_p309_Rebagliati http://hdl.handle.net/20.500.12110/paper_00740276_v93_n3_p309_Rebagliati |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Heteroptera Holokinetic chromosomes Meiotic behaviour Meiotic karyotype Triatoma Heteroptera Reduviidae Triatoma guasayana Triatoma sordida Trypanosoma Trypanosoma cruzi animal Argentina article chromosome map classification comparative study cytology genetics karyotyping male meiosis sex chromosome spermatogenesis Triatoma Triatominae Animals Argentina Chromosome Mapping Karyotyping Male Meiosis Sex Chromosomes Spermatogenesis Triatoma Triatominae |
| spellingShingle |
Heteroptera Holokinetic chromosomes Meiotic behaviour Meiotic karyotype Triatoma Heteroptera Reduviidae Triatoma guasayana Triatoma sordida Trypanosoma Trypanosoma cruzi animal Argentina article chromosome map classification comparative study cytology genetics karyotyping male meiosis sex chromosome spermatogenesis Triatoma Triatominae Animals Argentina Chromosome Mapping Karyotyping Male Meiosis Sex Chromosomes Spermatogenesis Triatoma Triatominae Rebagliati, Pablo Javier Papeschi, Alba Graciela Mola, Liliana Maria Pietrokovsky, Silvia Monica Wisnivesky Colli, María Cristina Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera) |
| topic_facet |
Heteroptera Holokinetic chromosomes Meiotic behaviour Meiotic karyotype Triatoma Heteroptera Reduviidae Triatoma guasayana Triatoma sordida Trypanosoma Trypanosoma cruzi animal Argentina article chromosome map classification comparative study cytology genetics karyotyping male meiosis sex chromosome spermatogenesis Triatoma Triatominae Animals Argentina Chromosome Mapping Karyotyping Male Meiosis Sex Chromosomes Spermatogenesis Triatoma Triatominae |
| description |
Triatoma sordida and T. guasayana are competent Trypanosoma cruzi vectors, with overlapping distribution areas in Argentina. Both species are morphologically similar, and their immature stages are hard to discriminate. Cytogenetic studies in the genus Triatoma reveal scarce karyotypic variations, being 2n= 20 + XY the most frequent diploid number in males. In the present work the meiotic behaviour of different Argentinian populations of T. sordida and T. guasayana has been analyzed; the meiotic karyotype of both species has also been compared. The species differ in total chromosome area and in the relative area of the sex chromosomes. These meiotic karyotypic differences constitute an additional tool for the taxonomic characterization of T. sordida and T. guasayana. The analysis of an interpopulation hybrid of T. sordida (Brazil x Argentina) reveals a regular meiotic behaviour, despite the presence of heteromorphic bivalents. Our observations support the hypothesis that karyotype variations through the gain or loss of heterochromatin can not be considered as a primary mechanism of reproductive isolation in Triatoma. |
| author |
Rebagliati, Pablo Javier Papeschi, Alba Graciela Mola, Liliana Maria Pietrokovsky, Silvia Monica Wisnivesky Colli, María Cristina |
| author_facet |
Rebagliati, Pablo Javier Papeschi, Alba Graciela Mola, Liliana Maria Pietrokovsky, Silvia Monica Wisnivesky Colli, María Cristina |
| author_sort |
Rebagliati, Pablo Javier |
| title |
Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera) |
| title_short |
Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera) |
| title_full |
Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera) |
| title_fullStr |
Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera) |
| title_full_unstemmed |
Comparative Meiotic Studies in Triatoma sordida (Stål) and T. guasayana Wygodzinsky & Abalos (Reduviidae, Heteroptera) |
| title_sort |
comparative meiotic studies in triatoma sordida (stål) and t. guasayana wygodzinsky & abalos (reduviidae, heteroptera) |
| publishDate |
1998 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v93_n3_p309_Rebagliati http://hdl.handle.net/20.500.12110/paper_00740276_v93_n3_p309_Rebagliati |
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