A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogenetics
Abstract Loricariidae is a Neotropical fish family divided into six subfamilies and ranking in third among the most biodiverse fish groups. This study conducts an updated review of the cytogenetic investigations within the family, discussing the trends in chromosomal evolution and the main gaps and...
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Sociedade Brasileira de Ictiologia
2025-01-01
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252024000400301&lng=en&tlng=en |
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| author | Francisco de Menezes Cavalcante Sassi Marcelo de Bello Cioffi Orlando Moreira-Filho |
| author_facet | Francisco de Menezes Cavalcante Sassi Marcelo de Bello Cioffi Orlando Moreira-Filho |
| author_sort | Francisco de Menezes Cavalcante Sassi |
| collection | DOAJ |
| description | Abstract Loricariidae is a Neotropical fish family divided into six subfamilies and ranking in third among the most biodiverse fish groups. This study conducts an updated review of the cytogenetic investigations within the family, discussing the trends in chromosomal evolution and the main gaps and future directions for studies. Covering 125 publications that analyzed 234 species from all subfamilies except Lithogeninae, corresponding to about 21% of the valid species diversity, our study revealed samples from six different river basins in Argentina, Brazil, Ecuador, Paraguay, and Venezuela. There was a dearth of data for northeast Brazil, the Western Amazon, the Guianas Shield, and other Neotropical countries. In loricariids, there are seven different sex chromosome systems and a variety of diploid numbers (2n) ranging from 33 to 96 as a result of different chromosomal rearrangements such as fusions, fissions, translocations, and inversions. We recorded more simple nucleolar organizer regions (Ag-NOR) compared to multiple ones, and the fundamental number (FN) varied between 34 and 142. Populational studies have been conducted only in a few taxa, but a remarkable karyotype variation that includes B chromosomes is shown. Despite continuous efforts, cytogenetics still does not adequately capture the diversity of Loricariidae. |
| format | Article |
| id | doaj-art-9b1ac1f4c23a47e3b8d7c58f045ed46c |
| institution | Kabale University |
| issn | 1982-0224 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj-art-9b1ac1f4c23a47e3b8d7c58f045ed46c2025-01-21T07:40:32ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242025-01-0122410.1590/1982-0224-2024-0050A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogeneticsFrancisco de Menezes Cavalcante Sassihttps://orcid.org/0000-0001-5699-5789Marcelo de Bello Cioffihttps://orcid.org/0000-0003-4340-1464Orlando Moreira-Filhohttps://orcid.org/0000-0001-5137-0122Abstract Loricariidae is a Neotropical fish family divided into six subfamilies and ranking in third among the most biodiverse fish groups. This study conducts an updated review of the cytogenetic investigations within the family, discussing the trends in chromosomal evolution and the main gaps and future directions for studies. Covering 125 publications that analyzed 234 species from all subfamilies except Lithogeninae, corresponding to about 21% of the valid species diversity, our study revealed samples from six different river basins in Argentina, Brazil, Ecuador, Paraguay, and Venezuela. There was a dearth of data for northeast Brazil, the Western Amazon, the Guianas Shield, and other Neotropical countries. In loricariids, there are seven different sex chromosome systems and a variety of diploid numbers (2n) ranging from 33 to 96 as a result of different chromosomal rearrangements such as fusions, fissions, translocations, and inversions. We recorded more simple nucleolar organizer regions (Ag-NOR) compared to multiple ones, and the fundamental number (FN) varied between 34 and 142. Populational studies have been conducted only in a few taxa, but a remarkable karyotype variation that includes B chromosomes is shown. Despite continuous efforts, cytogenetics still does not adequately capture the diversity of Loricariidae.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252024000400301&lng=en&tlng=enAg-NORB chromosomesKaryotypePlecosSex chromosomes |
| spellingShingle | Francisco de Menezes Cavalcante Sassi Marcelo de Bello Cioffi Orlando Moreira-Filho A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogenetics Neotropical Ichthyology Ag-NOR B chromosomes Karyotype Plecos Sex chromosomes |
| title | A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogenetics |
| title_full | A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogenetics |
| title_fullStr | A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogenetics |
| title_full_unstemmed | A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogenetics |
| title_short | A state-of-art review of Loricariidae (Ostariophysi: Siluriformes) cytogenetics |
| title_sort | state of art review of loricariidae ostariophysi siluriformes cytogenetics |
| topic | Ag-NOR B chromosomes Karyotype Plecos Sex chromosomes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252024000400301&lng=en&tlng=en |
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