Chromosomal analysis of Centromochlus heckelii (Siluriformes: Auchenipteridae), with a contribution to Centromochlus definition
ABSTRACT Historically, there are divergences in the species allocation between Centromochlus and Tatia. This study aimed to generate the first cytogenetic data about Centromochlus and, by analyzing a population of Centromochlus heckelii from the Amazon River basin, to contribute as evidence to a his...
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| Format: | Article |
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Sociedade Brasileira de Ictiologia
2020-09-01
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300203&tlng=en |
| _version_ | 1818744396500172800 |
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| author | Samantha Kowalski Leonardo Marcel Paiz Maelin da Silva Amanda de Souza Machado Eliana Feldberg Josiane Baccarin Traldi Vladimir Pavan Margarido Roberto Laridondo Lui |
| author_facet | Samantha Kowalski Leonardo Marcel Paiz Maelin da Silva Amanda de Souza Machado Eliana Feldberg Josiane Baccarin Traldi Vladimir Pavan Margarido Roberto Laridondo Lui |
| author_sort | Samantha Kowalski |
| collection | DOAJ |
| description | ABSTRACT Historically, there are divergences in the species allocation between Centromochlus and Tatia. This study aimed to generate the first cytogenetic data about Centromochlus and, by analyzing a population of Centromochlus heckelii from the Amazon River basin, to contribute as evidence to a historical taxonomic dilemma. Diploid number of 46 chromosomes and a heteromorphic pair was found in the female karyotypes, thus characterizing a ZZ/ZW sex chromosome system. Pale blocks of heterochromatin were located in centromeric regions of some chromosomes; however, the exclusive female chromosome (W) is almost entirely heterochromatic. AgNORs were detected in terminal position on the short arms of one acrocentric pair in males and two chromosome pairs in females, the acrocentric plus the sex chromosome pair. Notable differences between Centromochlus heckelii and previous data about species of Tatia are: lower diploid number, presence of a sex chromosome system and multiple AgNORs in Centromochlus, while species of Tatia have simple AgNORs and the absence of acrocentric chromosomes. Results in this study show that chromosomal markers could contribute as evidence to taxonomic delimitation studies. |
| first_indexed | 2024-12-18T02:43:39Z |
| format | Article |
| id | doaj.art-b4bdd21466d2407f8ba17f41ad4624f8 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-18T02:43:39Z |
| publishDate | 2020-09-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-b4bdd21466d2407f8ba17f41ad4624f82022-12-21T21:23:36ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242020-09-0118310.1590/1982-0224-2020-0009Chromosomal analysis of Centromochlus heckelii (Siluriformes: Auchenipteridae), with a contribution to Centromochlus definitionSamantha Kowalskihttps://orcid.org/0000-0002-4507-5714Leonardo Marcel Paizhttps://orcid.org/0000-0002-4761-8321Maelin da Silvahttps://orcid.org/0000-0001-7356-0605Amanda de Souza Machadohttps://orcid.org/0000-0002-1253-1357Eliana Feldberghttps://orcid.org/0000-0002-2962-4541Josiane Baccarin Traldihttps://orcid.org/0000-0003-3019-7441Vladimir Pavan Margaridohttps://orcid.org/0000-0002-0823-6646Roberto Laridondo Luihttps://orcid.org/0000-0003-4310-4865ABSTRACT Historically, there are divergences in the species allocation between Centromochlus and Tatia. This study aimed to generate the first cytogenetic data about Centromochlus and, by analyzing a population of Centromochlus heckelii from the Amazon River basin, to contribute as evidence to a historical taxonomic dilemma. Diploid number of 46 chromosomes and a heteromorphic pair was found in the female karyotypes, thus characterizing a ZZ/ZW sex chromosome system. Pale blocks of heterochromatin were located in centromeric regions of some chromosomes; however, the exclusive female chromosome (W) is almost entirely heterochromatic. AgNORs were detected in terminal position on the short arms of one acrocentric pair in males and two chromosome pairs in females, the acrocentric plus the sex chromosome pair. Notable differences between Centromochlus heckelii and previous data about species of Tatia are: lower diploid number, presence of a sex chromosome system and multiple AgNORs in Centromochlus, while species of Tatia have simple AgNORs and the absence of acrocentric chromosomes. Results in this study show that chromosomal markers could contribute as evidence to taxonomic delimitation studies.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300203&tlng=enCentromochlinaeCytogeneticsSex chromosome systemTaxonomyZZ/ZW |
| spellingShingle | Samantha Kowalski Leonardo Marcel Paiz Maelin da Silva Amanda de Souza Machado Eliana Feldberg Josiane Baccarin Traldi Vladimir Pavan Margarido Roberto Laridondo Lui Chromosomal analysis of Centromochlus heckelii (Siluriformes: Auchenipteridae), with a contribution to Centromochlus definition Neotropical Ichthyology Centromochlinae Cytogenetics Sex chromosome system Taxonomy ZZ/ZW |
| title | Chromosomal analysis of Centromochlus heckelii (Siluriformes: Auchenipteridae), with a contribution to Centromochlus definition |
| title_full | Chromosomal analysis of Centromochlus heckelii (Siluriformes: Auchenipteridae), with a contribution to Centromochlus definition |
| title_fullStr | Chromosomal analysis of Centromochlus heckelii (Siluriformes: Auchenipteridae), with a contribution to Centromochlus definition |
| title_full_unstemmed | Chromosomal analysis of Centromochlus heckelii (Siluriformes: Auchenipteridae), with a contribution to Centromochlus definition |
| title_short | Chromosomal analysis of Centromochlus heckelii (Siluriformes: Auchenipteridae), with a contribution to Centromochlus definition |
| title_sort | chromosomal analysis of centromochlus heckelii siluriformes auchenipteridae with a contribution to centromochlus definition |
| topic | Centromochlinae Cytogenetics Sex chromosome system Taxonomy ZZ/ZW |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300203&tlng=en |
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