| Journal: | Genetics and molecular biology |
| Database: | PERIÓDICA |
| System number: | 000459245 |
| ISSN: | 1415-4757 |
| Authors: | Silva, Anelise Fernandes e1 Oliveira, Thays Duarte de1 Bertocchi, Natasha Ávila1 Valente, Vera Lúcia da Silva1 Zefa, Edison2 Deprá, Maríndia1 |
| Institutions: | 1Universidade Federal do Rio Grande do Sul, Instituto de Biociencias, Porto Alegre, Rio Grande do Sul. Brasil 2Universidade Federal de Pelotas, Instituto de Biologia, Capao do Leao, Rio Grande do Sul. Brasil |
| Year: | 2022 |
| Volumen: | 45 |
| Number: | 2 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | Karyotypes in the worldwide subfamily Oecanthinae show variations in diploid number, chromosome morphology, and sex-chromosome system. This study described the chromosome set and phylogenetic relationships of four Neotropical species, Oecanthus lineolatus, O. valensis, O. pallidus, and O. pictus. We used classical cytogenetics and Bayesian Inference for phylogenetic reconstruction, using the mitochondrial genes COI, 12S rRNA, and 16S rRNA; and analyzed the phylogenetic patterns of changes in chromosome numbers, using ChromEvol. We observed differences in chromosome number among species and two different sex-chromosome systems. Oecanthus pictus showed 2n = 21, X0♂/22, XX♀; O. lineolatus, 2n = 20, XY♂/XX♀; and O. valensis and O. pallidus, 2n = 18, XY♂/XX♀. The karyotype of Oecanthus was asymmetric, one group with large chromosomes and variation in heterochromatin distribution, and another with small acrocentric chromosomes. The phylogenetic tree recovered two main groups: one with the Palearctic species and another with species from different bioregions, but with low posterior probability. The Neotropical species grouped separately, O. valensis and O. pictus with Nearctic and Ethiopian species, and O. pallidus and O. lineolatus in another, well-supported clade. Together, the phylogenic and chromosome data suggest descending dysploidy events during the evolution of the group |
| Disciplines: | Biología |
| Keyword: | Genética, Insectos, Orthoptera, Grillos, Citogenética molecular, Marcadores moleculares, Cariotipos, Inferencia bayesiana |
| Keyword: | Genetics, Insects, Orthoptera, Crickets, Molecular cytogenetics, Karyotypes, Bayesian inference |
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