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Bruschi DP, Sousa DY, Soares A, de Carvalho KA, Busin CS, Ficanha NC, Lima AP, Andrade GV, Recco-Pimentel SM. Comparative cytogenetics of nine populations of the Rhinella genus (Anura, Bufonidae) with a highlight on their conservative karyotype. Genet Mol Biol 2019; 42:445-451. [PMID: 31259364 PMCID: PMC6726150 DOI: 10.1590/1678-4685-gmb-2018-0139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 07/17/2018] [Indexed: 11/21/2022] Open
Abstract
The genus Rhinella is one of the most diverse groups of bufonid toads, currently composed by 93 valid species and naturally distributed throughout different Neotropical ecoregions. Here, we analyze nine Brazilian populations of toads representing species of the Rhinella margaritifera and Rhinella marina groups. These new data include the first description of the R. hoogmoedi and R. proboscidae karyotypes, as well as other taxonomically unresolved forms. Chromosomal analysis of the populations revealed pronounced chromosomal uniformity (2n=22), including the diploid number and chromosomal morphology. Three different NOR-bearing chromosomes were identified: in the subterminal region of pair 10q in R. hoogmoedi, Rhinella sp. 1 and Rhinella sp. 2, in subterminal region of 7p in R. proboscidae and Rhinella cf. margaritifera while in R. henseli and R. icterica was detected in interstitial region of 7p. Karyotypic uniformity of the genus permits the inference of interspecific chromosome homologies and evolutionary changes in the NOR-bearing chromosome may represent an informative character in species group level. The review of the cytogenetic data of the Rhinella species together with the new karyotypes reported here contributes to the understanding of the chromosomal evolution of these toads, which karyotypes are highly conserved despite the ample distribution of many forms.
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Affiliation(s)
- Daniel Pacheco Bruschi
- Departamento de Genética, Setor de Ciências Biológicas,
Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
- Departamento de Biologia Estrutural e Funcional, Instituto de
Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, SP,
Brazil
| | - Deborah Yasmim Sousa
- Departamento de Genética, Setor de Ciências Biológicas,
Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
| | - Amanda Soares
- Departamento de Genética, Setor de Ciências Biológicas,
Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
| | - Klélia Aparecida de Carvalho
- Departamento de Genética e Evolução, Microbiologia e
Imunologia, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP),
Campinas, SP, Brazil
| | - Carmen Sílvia Busin
- Instituto de Ciências Biológicas, Programa de Pós-Graduação em
Ciências Ambientais (PPGCiAmb), Universidade de Passo Fundo (UPF), Passo Fundo,
RS, Brazil
| | - Natália Cristine Ficanha
- Instituto de Ciências Biológicas, Programa de Pós-Graduação em
Ciências Ambientais (PPGCiAmb), Universidade de Passo Fundo (UPF), Passo Fundo,
RS, Brazil
| | | | - Gilda Vasconcellos Andrade
- Departamento de Biologia, Centro de Ciências Biológicas e da
Saúde, Universidade Federal do Maranhão (UFMA), São Luís, MA, Brazil
| | - Shirlei Maria Recco-Pimentel
- Departamento de Biologia Estrutural e Funcional, Instituto de
Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, SP,
Brazil
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Medeiros LR, Lourenço LB, Rossa-Feres DC, Lima AP, Andrade GV, Giaretta AA, Egito GTBT, Recco-Pimentel SM. Comparative cytogenetic analysis of some species of the Dendropsophus microcephalus group (Anura, Hylidae) in the light of phylogenetic inferences. BMC Genet 2013; 14:59. [PMID: 23822759 PMCID: PMC3710474 DOI: 10.1186/1471-2156-14-59] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 06/20/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dendropsophus is a monophyletic anuran genus with a diploid number of 30 chromosomes as an important synapomorphy. However, the internal phylogenetic relationships of this genus are poorly understood. Interestingly, an intriguing interspecific variation in the telocentric chromosome number has been useful in species identification. To address certain uncertainties related to one of the species groups of Dendropsophus, the D. microcephalus group, we carried out a cytogenetic analysis combined with phylogenetic inferences based on mitochondrial sequences, which aimed to aid in the analysis of chromosomal characters. Populations of Dendropsophus nanus, Dendropsophus walfordi, Dendropsophus sanborni, Dendropsophus jimi and Dendropsophus elianeae, ranging from the extreme south to the north of Brazil, were cytogenetically compared. A mitochondrial region of the ribosomal 12S gene from these populations, as well as from 30 other species of Dendropsophus, was used for the phylogenetic inferences. Phylogenetic relationships were inferred using maximum parsimony and Bayesian analyses. RESULTS The species D. nanus and D. walfordi exhibited identical karyotypes (2n = 30; FN = 52), with four pairs of telocentric chromosomes and a NOR located on metacentric chromosome pair 13. In all of the phylogenetic hypotheses, the paraphyly of D. nanus and D. walfordi was inferred. D. sanborni from Botucatu-SP and Torres-RS showed the same karyotype as D. jimi, with 5 pairs of telocentric chromosomes (2n = 30; FN = 50) and a terminal NOR in the long arm of the telocentric chromosome pair 12. Despite their karyotypic similarity, these species were not found to compose a monophyletic group. Finally, the phylogenetic and cytogenetic analyses did not cluster the specimens of D. elianeae according to their geographical occurrence or recognized morphotypes. CONCLUSIONS We suggest that a taxonomic revision of the taxa D. nanus and D. walfordi is quite necessary. We also observe that the number of telocentric chromosomes is useful to distinguish among valid species in some cases, although it is unchanged in species that are not necessarily closely related phylogenetically. Therefore, inferences based on this chromosomal character must be made with caution; a proper evolutionary analysis of the karyotypic variation in Dendropsophus depends on further characterization of the telocentric chromosomes found in this group.
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Affiliation(s)
- Lilian Ricco Medeiros
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13086-863, Campinas, SP, Brazil
| | - Luciana Bolsoni Lourenço
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13086-863, Campinas, SP, Brazil
| | - Denise Cerqueira Rossa-Feres
- Departamento de Zoologia e Botânica, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista (UNESP), 15054-000, São José do Rio Preto, São Paulo, Brazil
| | - Albertina Pimentel Lima
- Coordenadoria de Pesquisas em Ecologia, Instituto Nacional de Pesquisas da Amazônia (INPA), 69011-970, Manaus, AM, Brazil
| | - Gilda Vasconcellos Andrade
- Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão (UFMA), Campus do Bacanga, 65080-040, São Luís, MA, Brazil
| | - Ariovaldo Antonio Giaretta
- Laboratório de Anuros Neotropicais, Faculdade de Ciências Integradas do Pontal, Universidade Federal de Uberlândia, 38304-402, Ituiutaba, MG, Brazil
| | - Gabriel Toselli Barbosa Tabosa Egito
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13086-863, Campinas, SP, Brazil
- Departamento de Polícia Federal, Ministério da Justiça, 68908-901, Macapá, AP, Brazil
| | - Shirlei Maria Recco-Pimentel
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13086-863, Campinas, SP, Brazil
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Conte M, Zucchi MI, Andrade GV, Souza AP, Recco-Pimentel SM. Study of closely related species within the Physalaemus cuvieri group (Anura): contribution of microsatellite markers. Genet Mol Res 2012; 10:1434-44. [PMID: 21823093 DOI: 10.4238/vol10-3gmr1136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Various species of the Physalaemus cuvieri group of frogs are difficult to distinguish morphologically, making molecular analysis an attractive alternative for indentifying members of this group, which is considered to be at risk because of loss of habitat. The genetic structure of natural populations of P. ephippifer and P. albonotatus species was investigated and analyzed, together with that of five previously studied populations of P. cuvieri. Nine microsatellite loci were used in the analyses. The overall G(ST) value (0.46) revealed high genetic variation among the populations, as expected for different species. Bayesian analysis implemented by the STRUCTURE software clustered the seven populations into seven groups (K = 7). All the P. albonotatus and P. ephippifer specimens were grouped into a single cluster, both species showing clear differentiation from P. cuvieri. The different grouping based on these microsatellites of some P. cuvieri individuals from Porto Nacional and from Passo Fundo suggests that they could be a new species, indicating a necessity for taxonomic reevaluation. Despite the intrinsic difficulties in analyzing closely related species, the nine microsatellite loci were found to be adequate for distinguishing these three species of the P. cuvieri group and their populations.
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Affiliation(s)
- M Conte
- Departamento de Anatomia, Biologia Celular e Fisiologia e Biofísica, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brasil
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Busin CS, Andrade GV, Bertoldo J, Del Grande ML, Uetanabaro M, Recco-Pimentel SM. Cytogenetic analysis of four species of Pseudis (Anura, Hylidae), with the description of ZZ/ZW sex chromosomes in P. tocantins. Genetica 2007; 133:119-27. [PMID: 17713858 DOI: 10.1007/s10709-007-9189-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2006] [Accepted: 07/30/2007] [Indexed: 10/22/2022]
Abstract
Pseudis paradoxa paradoxa, P. p. platensis, P. bolbodactyla, P. fusca and P. tocantins were analyzed cytogenetically by conventional chromosomal staining, C-banding, silver staining and fluorescent in situ hybridization with an rDNA probe. Pseudis tocantins chromosomes were also stained with distamycin A/DAPI. All of the species had a diploid number of 2n = 24 chromosomes and the nucleolar organizer region (NOR) was located on pair 7. However, the karyotypes could be differentiated based on the morphology of chromosomal pairs 2 and 8, the region that the NORs occupied on the long arms of the homologous of pair 7, and the pattern of heterochromatin distribution. The subspecies P. p. paradoxa and P. p. platensis had identical karyotypes. Heteromorphism in NOR size was seen in P. p. paradoxa, P. p. platensis, P. bolbodactyla and P. fusca. Heteromorphic sex chromosomes (ZZ/ZW) were identified in P. tocantins. The W chromosome was subtelocentric and larger than the metacentric Z chromosomes. The differences observed in the C-banding pattern and in the position of the NOR on the sex chromosomes suggested that inversions and heterochromatinization were responsible for the morphological differentiation of these chromosomes.
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Affiliation(s)
- Carmen Silvia Busin
- Departamento de Biologia Celular, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, 13083-863, Brazil
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