Comparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon region
We made a comparative analysis of the cytogenetics of spiny rat species of the genus Proechimys collected from several sites of the Madeira River basin (Amazonas State, Brazil) and Jari River valley (Pará State, Brazil). Individuals were assigned to three groups based on diploid and fundamental numb...
| Autor principal: | Eler, Eduardo Schmidt |
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| Outros Autores: | Silva, Maria Nazareth Fda, Silva, Carlos E.F., Feldberg, Eliana |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Genetics and Molecular Research
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/14996 |
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oai:repositorio:1-14996 |
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oai:repositorio:1-14996 Comparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon region Eler, Eduardo Schmidt Silva, Maria Nazareth Fda Silva, Carlos E.F. Feldberg, Eliana Brasil Chromosome Analysis Chromosome Arm Chromosome Band Chromosome Nor Controlled Study Cytogenetics Cytotype Diploidy Female Genetic Conservation Genus Geographic Distribution Karyotyping Male Nonhuman Rat River Basin Rodent Sequence Homology Sex Chromosome Species Difference Animal Brasil Chromosome Banding Karyotyping Rodentia Echimyidae Proechimys Proechimys Cuvieri Rattus Rodentia We made a comparative analysis of the cytogenetics of spiny rat species of the genus Proechimys collected from several sites of the Madeira River basin (Amazonas State, Brazil) and Jari River valley (Pará State, Brazil). Individuals were assigned to three groups based on diploid and fundamental numbers: 2n=28, FN=46 (P. cuvieri and P. gr. longicaudatus); 2n=38, FN=52 (Proechimys gr. guyannensis), and 2n=40, FN=54 (P. gardneri). The nucleolar organizer region (NOR) was interstitial on the long arm of one submetacentric pair, as seen in all species of Proechimys analyzed thus far. However, its position in the karyotype was variable. A duplication of the NOR in one of the homologues was detected in P. gr. longicaudatus from the Aripuanã basin along the mid Madeira. The C-band pattern varied between species and, together with the NOR, allowed the identification of two evolutionary units in P. gr. longicaudatus in the region of the mid Madeira River (cytotypes A and B). The morphology and banding of the sex chromosomes were species specific. A range extension is suggested for the geographic distribution of P. gardneri and P. gr. longicaudatus. Moreover, we suggest that species of Proechimys with 2n=38 chromosomes are restricted to east of the Negro River and north of the Amazon River. We also revised the published chromosome data available for Proechimys. © FUNPEC-RP. 2020-05-07T14:00:25Z 2020-05-07T14:00:25Z 2012 Artigo https://repositorio.inpa.gov.br/handle/1/14996 10.4238/2012.April.3.5 en Volume 11, Número 2, Pags. 830-846 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Genetics and Molecular Research |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Brasil Chromosome Analysis Chromosome Arm Chromosome Band Chromosome Nor Controlled Study Cytogenetics Cytotype Diploidy Female Genetic Conservation Genus Geographic Distribution Karyotyping Male Nonhuman Rat River Basin Rodent Sequence Homology Sex Chromosome Species Difference Animal Brasil Chromosome Banding Karyotyping Rodentia Echimyidae Proechimys Proechimys Cuvieri Rattus Rodentia |
| spellingShingle |
Brasil Chromosome Analysis Chromosome Arm Chromosome Band Chromosome Nor Controlled Study Cytogenetics Cytotype Diploidy Female Genetic Conservation Genus Geographic Distribution Karyotyping Male Nonhuman Rat River Basin Rodent Sequence Homology Sex Chromosome Species Difference Animal Brasil Chromosome Banding Karyotyping Rodentia Echimyidae Proechimys Proechimys Cuvieri Rattus Rodentia Eler, Eduardo Schmidt Comparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon region |
| topic_facet |
Brasil Chromosome Analysis Chromosome Arm Chromosome Band Chromosome Nor Controlled Study Cytogenetics Cytotype Diploidy Female Genetic Conservation Genus Geographic Distribution Karyotyping Male Nonhuman Rat River Basin Rodent Sequence Homology Sex Chromosome Species Difference Animal Brasil Chromosome Banding Karyotyping Rodentia Echimyidae Proechimys Proechimys Cuvieri Rattus Rodentia |
| description |
We made a comparative analysis of the cytogenetics of spiny rat species of the genus Proechimys collected from several sites of the Madeira River basin (Amazonas State, Brazil) and Jari River valley (Pará State, Brazil). Individuals were assigned to three groups based on diploid and fundamental numbers: 2n=28, FN=46 (P. cuvieri and P. gr. longicaudatus); 2n=38, FN=52 (Proechimys gr. guyannensis), and 2n=40, FN=54 (P. gardneri). The nucleolar organizer region (NOR) was interstitial on the long arm of one submetacentric pair, as seen in all species of Proechimys analyzed thus far. However, its position in the karyotype was variable. A duplication of the NOR in one of the homologues was detected in P. gr. longicaudatus from the Aripuanã basin along the mid Madeira. The C-band pattern varied between species and, together with the NOR, allowed the identification of two evolutionary units in P. gr. longicaudatus in the region of the mid Madeira River (cytotypes A and B). The morphology and banding of the sex chromosomes were species specific. A range extension is suggested for the geographic distribution of P. gardneri and P. gr. longicaudatus. Moreover, we suggest that species of Proechimys with 2n=38 chromosomes are restricted to east of the Negro River and north of the Amazon River. We also revised the published chromosome data available for Proechimys. © FUNPEC-RP. |
| format |
Artigo |
| author |
Eler, Eduardo Schmidt |
| author2 |
Silva, Maria Nazareth Fda Silva, Carlos E.F. Feldberg, Eliana |
| author2Str |
Silva, Maria Nazareth Fda Silva, Carlos E.F. Feldberg, Eliana |
| title |
Comparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon region |
| title_short |
Comparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon region |
| title_full |
Comparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon region |
| title_fullStr |
Comparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon region |
| title_full_unstemmed |
Comparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon region |
| title_sort |
comparative cytogenetics of spiny rats of the genus proechimys (rodentia, echimyidae) from the amazon region |
| publisher |
Genetics and Molecular Research |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/14996 |
| _version_ |
1787141303692165120 |
| score |
11.755432 |