Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs)
Chromosome analyses were performed in two grasshopper species of the genus Schistocerca, S. pallens and S. flavofasciata. Both species shared the same diploid number (2n = 23, X in males; 2n = 24, XX in females);and a conserved karyotype composed exclusively of acrocentric chromosomes, but differed...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Genética
2007-01-01
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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=S1415-47572007000100011 |
| _version_ | 1819064045417791488 |
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| author | Maria José de Souza Natoniel Franklin de Melo |
| author_facet | Maria José de Souza Natoniel Franklin de Melo |
| author_sort | Maria José de Souza |
| collection | DOAJ |
| description | Chromosome analyses were performed in two grasshopper species of the genus Schistocerca, S. pallens and S. flavofasciata. Both species shared the same diploid number (2n = 23, X in males; 2n = 24, XX in females);and a conserved karyotype composed exclusively of acrocentric chromosomes, but differed in their distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs). Constitutive heterochromatin was located in the pericentromeric region of all chromosomes in both species. S. flavofasciata presented an additional C-band on the distal region of the long arm of a small autosome pair (S9). Nucleolus organizer regions (NORs), revealed by silver nitrate staining (Ag-NORs), were observed on a medium autosome pair (M5) in both species. S. pallens presented an additional NOR-bearing autosome (M6). The same sites were labeled after FISH with an rDNA probe in S. pallens cells. |
| first_indexed | 2024-12-21T15:24:19Z |
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| id | doaj.art-8a958703670a470ab11256ca5592617e |
| institution | Directory Open Access Journal |
| issn | 1415-4757 1678-4685 |
| language | English |
| last_indexed | 2024-12-21T15:24:19Z |
| publishDate | 2007-01-01 |
| publisher | Sociedade Brasileira de Genética |
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| series | Genetics and Molecular Biology |
| spelling | doaj.art-8a958703670a470ab11256ca5592617e2022-12-21T18:58:58ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1415-47571678-46852007-01-01301545910.1590/S1415-47572007000100011Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs)Maria José de SouzaNatoniel Franklin de MeloChromosome analyses were performed in two grasshopper species of the genus Schistocerca, S. pallens and S. flavofasciata. Both species shared the same diploid number (2n = 23, X in males; 2n = 24, XX in females);and a conserved karyotype composed exclusively of acrocentric chromosomes, but differed in their distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs). Constitutive heterochromatin was located in the pericentromeric region of all chromosomes in both species. S. flavofasciata presented an additional C-band on the distal region of the long arm of a small autosome pair (S9). Nucleolus organizer regions (NORs), revealed by silver nitrate staining (Ag-NORs), were observed on a medium autosome pair (M5) in both species. S. pallens presented an additional NOR-bearing autosome (M6). The same sites were labeled after FISH with an rDNA probe in S. pallens cells.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100011grasshopperconstitutive heterochromatinnucleolus organizer regions |
| spellingShingle | Maria José de Souza Natoniel Franklin de Melo Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs) Genetics and Molecular Biology grasshopper constitutive heterochromatin nucleolus organizer regions |
| title | Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs) |
| title_full | Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs) |
| title_fullStr | Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs) |
| title_full_unstemmed | Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs) |
| title_short | Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs) |
| title_sort | chromosome study in schistocerca orthoptera acrididae cyrtacanthacridinae karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions nors |
| topic | grasshopper constitutive heterochromatin nucleolus organizer regions |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100011 |
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