Múltiplas zonas de contato e evolução cariotípica em um complexo de espécies de anuros neotropicais

• Processo: 24/00352-9
• Modalidade de apoio: Auxílio à Pesquisa - Publicações científicas - Artigo
• Data de Início da vigência: 01 de março de 2024
• Data de Término da vigência: 31 de agosto de 2024
• Área do conhecimento: Ciências Biológicas - Genética - Genética Animal
• Pesquisador responsável: Luciana Bolsoni Lourenço
• Beneficiário: Luciana Bolsoni Lourenço
• Instituição Sede: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brasil
• Município da Instituição Sede: Campinas
• Assunto(s): Anura Evolução
• Palavra(s)-Chave do Pesquisador: Anura | chromosome | Karyotype | evolução

Resumo

Previous studies of DNA sequence and karyotypic data have revealed high genetic diversity in the Physalaemus cuvieri - Physalaemus ephippifer species complex-a group of small leptodactylid frogs in South America. To date, seven major genetic lineages have been recognized in this group, with species delimitation tests supporting four to seven of them as valid species. Among these, only P. ephippifer shows heteromorphic sex chromosomes, but the implications of cytogenetic divergence for the evolution of this group are unknown. We analyzed karyotypic, mitochondrial DNA, and 3RAD genomic data to characterize a putative contact zone between P. ephippifer and P. cuvieri Lineage 1, finding evidence for hybridizationadmixture and rapid karyotypic evolution. We also describe preliminary evidence for secondary contactadmixture between two other members of this species complex-Lineage 1 and Lineage 3 of P. cuvieri. Our study sheds new light on evolutionary relationships in the P. cuvieri - P. ephippifer species complex, suggesting an important role of karyotypic divergence in its evolutionary history and underscoring the importance of hybridization as a mechanism of sex chromosome evolution in amphibians. (AU)