INVESTIGADORES
BALDO Juan Diego
artículos
Título:
Phylogenetic relationships of toads of the Rhinella granulosa Group (Anura: Bufonidae): A molecular perspective with comments on hybridization and introgression
Autor/es:
PEREYRA MARTÏN; BALDO DIEGO; BLOTTO BORIS; IGLESIAS PATRICIA; THOMÉ TEREZA; BARIOS AMOROS CESAR; IBAÑEZ ROBERTO; HADDAD CELIO; FAIVOVICH JULIÁN
Revista:
CLADISTICS (PRINT)
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2016 vol. 32 p. 36 - 53
ISSN:
0748-3007
Resumen:
The Rhinella granulosa Group is composed of 13 species of toads distributed throughout open areas of South America and Panama. In this paper we perform a phylogenetic analysis considering all but one species of the group, employing five nuclear and four mitochondrial genes, for up to 8285 bp per specimen. Separate phylogenetic analyses under direct optimization (DO) of nuclear and mitochondrial sequences recovered the R. granulosa Group as monophyletic and revealed topological incongruence that can be mainly explained by multiple events of hybridization and introgression, both mitochondrial and nuclear. The DO combined analysis, after the exclusion of putatively introgressed or heterozygous genomes, resulted in a phylogenetic hypothesis for the R. granulosa Group in which most of the species are recovered as monophyletic, but with interspecific relationships poorly supported. The optimization of morphological (adult and larval), chromosomal, and behavioral characters resulted in 12 putative phenotypic synapomorphies for this species group and some other for internal clades. Our results indicate the need of additional population genetic studies on R. dorbignyi and R. fernandezae to corroborate the taxonomic status of both taxa. Finally, we discuss biological and genetic characteristics of Bufonidae, as possible explanations for the high occurrence of hybridization and introgression observed in some lineages of this family.