Cytogenetic and Nucleolar Meiotic Cycle Analyses in Dysdercus imitator Blöte, 1931 (Pyrrhocoridae, Heteroptera) from Argentina
So far, only seven and five species of Dysdercus from the Old and New Worlds, respectively, have been cytogenetically analysed. They all have holokinetic chromosomes and a pre-reductional type of meiosis. In the present study the chromosome complement, male meiosis and nucleolar meiotic cycle of Dys...
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todo:paper_00155497_v51_n3-4_p135_Bressa2023-10-03T14:13:35Z Cytogenetic and Nucleolar Meiotic Cycle Analyses in Dysdercus imitator Blöte, 1931 (Pyrrhocoridae, Heteroptera) from Argentina Bressa, M.J. Papeschi, A.G. Fumagalli, E. Van Doesburg, P.H. Larramendy, M.L. Dysdercus Heteroptera Holokinetic chromosomes Karyotype Nucleolar meiotic cycle Pyrrhocoridae Argentina article cell nucleus chromosome analysis cytogenetics Dysdercus imitator female genetic analysis Heteroptera karyotype male meiosis nonhuman pachytene species Animals Cell Cycle Chromosomes Cytogenetics Heteroptera Karyotyping Male Meiosis Dysdercus Heteroptera Insecta Pyrrhocoridae So far, only seven and five species of Dysdercus from the Old and New Worlds, respectively, have been cytogenetically analysed. They all have holokinetic chromosomes and a pre-reductional type of meiosis. In the present study the chromosome complement, male meiosis and nucleolar meiotic cycle of Dysdercus imitator were analyzed. During male meiosis several cytogenetic features are remarkable, namely the presence of a long diffuse stage after pachytene, the finding of one or two ring bivalents per cell in almost all specimens, and the presence of several prenucleolar bodies lasting up to telophase II. The origin and function of these prenucleolar bodies could be related to a particular physiological cycle of the meiocytes. Fil:Bressa, M.J. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00155497_v51_n3-4_p135_Bressa |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Dysdercus Heteroptera Holokinetic chromosomes Karyotype Nucleolar meiotic cycle Pyrrhocoridae Argentina article cell nucleus chromosome analysis cytogenetics Dysdercus imitator female genetic analysis Heteroptera karyotype male meiosis nonhuman pachytene species Animals Cell Cycle Chromosomes Cytogenetics Heteroptera Karyotyping Male Meiosis Dysdercus Heteroptera Insecta Pyrrhocoridae |
| spellingShingle |
Dysdercus Heteroptera Holokinetic chromosomes Karyotype Nucleolar meiotic cycle Pyrrhocoridae Argentina article cell nucleus chromosome analysis cytogenetics Dysdercus imitator female genetic analysis Heteroptera karyotype male meiosis nonhuman pachytene species Animals Cell Cycle Chromosomes Cytogenetics Heteroptera Karyotyping Male Meiosis Dysdercus Heteroptera Insecta Pyrrhocoridae Bressa, M.J. Papeschi, A.G. Fumagalli, E. Van Doesburg, P.H. Larramendy, M.L. Cytogenetic and Nucleolar Meiotic Cycle Analyses in Dysdercus imitator Blöte, 1931 (Pyrrhocoridae, Heteroptera) from Argentina |
| topic_facet |
Dysdercus Heteroptera Holokinetic chromosomes Karyotype Nucleolar meiotic cycle Pyrrhocoridae Argentina article cell nucleus chromosome analysis cytogenetics Dysdercus imitator female genetic analysis Heteroptera karyotype male meiosis nonhuman pachytene species Animals Cell Cycle Chromosomes Cytogenetics Heteroptera Karyotyping Male Meiosis Dysdercus Heteroptera Insecta Pyrrhocoridae |
| description |
So far, only seven and five species of Dysdercus from the Old and New Worlds, respectively, have been cytogenetically analysed. They all have holokinetic chromosomes and a pre-reductional type of meiosis. In the present study the chromosome complement, male meiosis and nucleolar meiotic cycle of Dysdercus imitator were analyzed. During male meiosis several cytogenetic features are remarkable, namely the presence of a long diffuse stage after pachytene, the finding of one or two ring bivalents per cell in almost all specimens, and the presence of several prenucleolar bodies lasting up to telophase II. The origin and function of these prenucleolar bodies could be related to a particular physiological cycle of the meiocytes. |
| format |
JOUR |
| author |
Bressa, M.J. Papeschi, A.G. Fumagalli, E. Van Doesburg, P.H. Larramendy, M.L. |
| author_facet |
Bressa, M.J. Papeschi, A.G. Fumagalli, E. Van Doesburg, P.H. Larramendy, M.L. |
| author_sort |
Bressa, M.J. |
| title |
Cytogenetic and Nucleolar Meiotic Cycle Analyses in Dysdercus imitator Blöte, 1931 (Pyrrhocoridae, Heteroptera) from Argentina |
| title_short |
Cytogenetic and Nucleolar Meiotic Cycle Analyses in Dysdercus imitator Blöte, 1931 (Pyrrhocoridae, Heteroptera) from Argentina |
| title_full |
Cytogenetic and Nucleolar Meiotic Cycle Analyses in Dysdercus imitator Blöte, 1931 (Pyrrhocoridae, Heteroptera) from Argentina |
| title_fullStr |
Cytogenetic and Nucleolar Meiotic Cycle Analyses in Dysdercus imitator Blöte, 1931 (Pyrrhocoridae, Heteroptera) from Argentina |
| title_full_unstemmed |
Cytogenetic and Nucleolar Meiotic Cycle Analyses in Dysdercus imitator Blöte, 1931 (Pyrrhocoridae, Heteroptera) from Argentina |
| title_sort |
cytogenetic and nucleolar meiotic cycle analyses in dysdercus imitator blöte, 1931 (pyrrhocoridae, heteroptera) from argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_00155497_v51_n3-4_p135_Bressa |
| work_keys_str_mv |
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