![[PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes](/Cover/Show?author=Francisco+Carlos+de+Souza+Valentim&callnumber=&size=medium&title=%5BPROVISIONAL%5D+Chromosomal+characterization+of+Amazonian+freshwater+stingrays+with+evidence+for+new+karyomorphs+and+XX%2FXY+sex+chromosomes&recordid=doaj.art-60dd1b41c0be478c98a5d53094479fd4&source=Solr&issn=1678-4685)
[PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes
Abstract Cytogenetic studies in the subfamily Potamotrygoninae has already provided valuable insights into the understanding of the evolution and diversification of its species. In the present study, the chromosomal features of seven nominal potamotrygonin species are provided: Plesiotrygon iwamae (...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sociedade Brasileira de Genética
|
| Series: | Genetics and Molecular Biology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019005020105&lng=en&tlng=en |
| _version_ | 1818766611335610368 |
|---|---|
| author | Francisco Carlos de Souza Valentim Jorge Ivan Rebelo Porto Eliana Feldberg |
| author_facet | Francisco Carlos de Souza Valentim Jorge Ivan Rebelo Porto Eliana Feldberg |
| author_sort | Francisco Carlos de Souza Valentim |
| collection | DOAJ |
| description | Abstract Cytogenetic studies in the subfamily Potamotrygoninae has already provided valuable insights into the understanding of the evolution and diversification of its species. In the present study, the chromosomal features of seven nominal potamotrygonin species are provided: Plesiotrygon iwamae (2n=74, FN=120), Potamotrygon amazona (2n=66, FN=107), P. constellata (2n=66, FN=110), P. leopoldi (2n=64, FN=102), P. motoro (2n=66, FN=106) from four different localities, P. orbignyi (2n=66, NF=106), Potamotrygon scobina (2n=66, FN=104), from Central Amazon. Additionally, we found new karyomorph in P. wallacei. We considered the localization of Nucleolus Organizer Regions (NORs), as well as the pattern of constitutive heterochromatin, as species-specific characters. We found an XX/XY sex chromosome system in P. orbignyi, and we suggest that P. scobina and P. amazona also possess the same sex chromosome system. Overall, the chromosomal evolution in this group appears to have progressed toward a reduction in the diploid number, with a concomitant increase in the number of bi-armed and nucleolar chromosomes. |
| first_indexed | 2024-12-18T08:36:44Z |
| format | Article |
| id | doaj.art-60dd1b41c0be478c98a5d53094479fd4 |
| institution | Directory Open Access Journal |
| issn | 1678-4685 |
| language | English |
| last_indexed | 2024-12-18T08:36:44Z |
| publisher | Sociedade Brasileira de Genética |
| record_format | Article |
| series | Genetics and Molecular Biology |
| spelling | doaj.art-60dd1b41c0be478c98a5d53094479fd42022-12-21T21:14:18ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1678-4685010.1590/1678-4685-gmb-2018-0229S1415-47572019005020105[PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomesFrancisco Carlos de Souza ValentimJorge Ivan Rebelo PortoEliana FeldbergAbstract Cytogenetic studies in the subfamily Potamotrygoninae has already provided valuable insights into the understanding of the evolution and diversification of its species. In the present study, the chromosomal features of seven nominal potamotrygonin species are provided: Plesiotrygon iwamae (2n=74, FN=120), Potamotrygon amazona (2n=66, FN=107), P. constellata (2n=66, FN=110), P. leopoldi (2n=64, FN=102), P. motoro (2n=66, FN=106) from four different localities, P. orbignyi (2n=66, NF=106), Potamotrygon scobina (2n=66, FN=104), from Central Amazon. Additionally, we found new karyomorph in P. wallacei. We considered the localization of Nucleolus Organizer Regions (NORs), as well as the pattern of constitutive heterochromatin, as species-specific characters. We found an XX/XY sex chromosome system in P. orbignyi, and we suggest that P. scobina and P. amazona also possess the same sex chromosome system. Overall, the chromosomal evolution in this group appears to have progressed toward a reduction in the diploid number, with a concomitant increase in the number of bi-armed and nucleolar chromosomes.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019005020105&lng=en&tlng=enElasmobranchscytogeneticschromosomal rearrangementssex chromosomeskaryotypic diversity |
| spellingShingle | Francisco Carlos de Souza Valentim Jorge Ivan Rebelo Porto Eliana Feldberg [PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes Genetics and Molecular Biology Elasmobranchs cytogenetics chromosomal rearrangements sex chromosomes karyotypic diversity |
| title | [PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes |
| title_full | [PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes |
| title_fullStr | [PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes |
| title_full_unstemmed | [PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes |
| title_short | [PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes |
| title_sort | provisional chromosomal characterization of amazonian freshwater stingrays with evidence for new karyomorphs and xx xy sex chromosomes |
| topic | Elasmobranchs cytogenetics chromosomal rearrangements sex chromosomes karyotypic diversity |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019005020105&lng=en&tlng=en |
| work_keys_str_mv | AT franciscocarlosdesouzavalentim provisionalchromosomalcharacterizationofamazonianfreshwaterstingrayswithevidencefornewkaryomorphsandxxxysexchromosomes AT jorgeivanrebeloporto provisionalchromosomalcharacterizationofamazonianfreshwaterstingrayswithevidencefornewkaryomorphsandxxxysexchromosomes AT elianafeldberg provisionalchromosomalcharacterizationofamazonianfreshwaterstingrayswithevidencefornewkaryomorphsandxxxysexchromosomes |