1
|
Dominato RC, de Oliveira GC, Cassini CS, Orrico VGD, Mariano CDSF, Silva JG. First karyotype description of the species of Adenomera Steindachner, 1867 (Anura, Leptodactylidae) in the " thomei" clade. COMPARATIVE CYTOGENETICS 2022; 16:151-159. [PMID: 36762072 PMCID: PMC9849051 DOI: 10.3897/compcytogen.v16.i3.82641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 04/06/2022] [Indexed: 06/18/2023]
Abstract
The genus Adenomera Steindachner, 1867 currently comprises 29 nominal species, some of which are suggested to be cryptic species complexes. The present study was carried out with specimens of the "thomei" clade that encompasses three taxa distributed in the Atlantic Forest biome: Adenomerathomei Almeida et Angulo, 2006, Adenomera sp. L., and Adenomera sp. M. We used classical cytogenetics to describe the diploid number and karyomorphology of these three species collected in two different locations in the state of Bahia, Brazil. Our results revealed the diploid number 2n = 24 (FN = 34) with two pairs of metacentric chromosomes (pairs 1 and 5), three pairs of submetacentric chromosomes (pairs 2, 3, and 4), and seven pairs of telocentric chromosomes (pairs 6, 7, 8, 9, 10, 11, and 12). Further morphological, bioacoustic, and cytogenetic data (C-banding and AgNor) are needed to better delineate the lineages within the "thomei" clade.
Collapse
Affiliation(s)
- Ramon Costa Dominato
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16. CEP: 45662-900 Ilhéus, BA BrazilUniversidade Estadual de Santa CruzIlhéusBrazil
| | - Guilherme Costa de Oliveira
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16. CEP: 45662-900 Ilhéus, BA BrazilUniversidade Estadual de Santa CruzIlhéusBrazil
| | - Carla Santana Cassini
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16. CEP: 45662-900 Ilhéus, BA BrazilUniversidade Estadual de Santa CruzIlhéusBrazil
| | - Victor Goyannes Dill Orrico
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16. CEP: 45662-900 Ilhéus, BA BrazilUniversidade Estadual de Santa CruzIlhéusBrazil
| | - Cléa dos Santos Ferreira Mariano
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16. CEP: 45662-900 Ilhéus, BA BrazilUniversidade Estadual de Santa CruzIlhéusBrazil
| | - Janisete Gomes Silva
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16. CEP: 45662-900 Ilhéus, BA BrazilUniversidade Estadual de Santa CruzIlhéusBrazil
| |
Collapse
|
2
|
do Nascimento FAC, de Sá RO, Garcia PCDA. Larval morphology of Amazonia foam-nesting frogs of the genus Engystomops (Anura: Leptodactylidae: Leiuperinae). J Morphol 2022; 283:1299-1317. [PMID: 35971644 DOI: 10.1002/jmor.21503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/31/2022] [Accepted: 08/04/2022] [Indexed: 11/12/2022]
Abstract
The highly differentiated anuran larvae make them an interesting and complementary source of information to understand anuran evolution. Among neotropical foam-nesting frogs, the available information on tadpole morphology for the subfamily Leiuperinae remains largely incomplete and variably reported among genera; in the monophyletic genus Engystomops it is still incipient. Herein, we summarize available information on larval morphology for five of the nine known species of Engystomops, three of them for the first time, reporting external morphology, buccopharyngeal cavity, and skeleton. The tadpoles of the genus have an overall generalized morphology and many traits are conserved across species. Nevertheless, many characters are systematically informative and some are diagnostic for some species, as the paravertebral gland in E. petersi and the dorsally directed spiracle in E. puyango. Other characters provide support for some subclades within the genus. Moreover, some traits, such as the direction of the vent tube, supports the close relationship between Engystomops and Physalaemus, whereas other support the existence of these two as distinct genera, such as the overall shape of the lateral ridge papillae and the presence of a processus pseudopterygoideus. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Filipe A C do Nascimento
- Setor de Herpetologia, Museu de História Natural, Universidade Federal de Alagoas, Maceió, Alagoas, Brazil.,Pós-Graduação em Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rafael O de Sá
- Department of Biology, University of Richmond, Richmond, Virginia, USA
| | - Paulo C de A Garcia
- Pós-Graduação em Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.,Departamento de Ecologia e Zoologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| |
Collapse
|
3
|
Pedroso RN, Santos MTT, Lourenço LB. Rapid karyotypic evolution with high diploid number variation in a rare genus of bromeligenous frogs. Genome 2022; 65:255-264. [PMID: 35275781 DOI: 10.1139/gen-2021-0090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bromeligenous Crossodactylodes is a leptodactylid genus closely related to Paratelmatobius and Scythrophrys. The diploid number in all karyotyped species of these two latter genera is 24, which diverges from the modal diploid number (2n = 22) in the family. Here, we analyzed three species of Crossodactylodes and found karyotypes with 2n = 30, 2n = 32, and 2n = 36, diploid numbers that have not been reported in any other diploid leptodactylid species to date. Reconstruction of the ancestral chromosome number indicated that the diploid number changed from 22 to 24 in the common ancestor of Crossodactylodes, Paratelmatobius, and Scythrophrys, and that progressive increases in diploid number have occurred in Crossodactylodes. The large number of telocentric/subtelocentric chromosomes in karyotypes with higher diploid numbers raises the possibility that centric fissions may have occurred during the evolution of Paratelmatobiinae. Three metacentric chromosomes, probably involved in fission events, were inferred to be present in the common ancestor of all species of Crossodactylodes, but in C. bokermanni. Chromosome mapping of the satellite DNA PcP190 suggests homology between one arm of metacentric chromosome 1 of Crossodactylodes sp. 3 and telocentric chromosome 2 of C. itambe, supporting one of the presumed centric fission events.
Collapse
Affiliation(s)
- Ricardo Neves Pedroso
- LabEsC (Laboratório de Estudos Cromossômicos), Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13083-863, Campinas, SP, Brazil
| | - Marcus Thadeu Teixeira Santos
- Laboratório de Herpetologia, Departamento de Biodiversidade e Centro de Aquicultura (CAUNESP), Instituto de Biociências, Universidade Estadual Paulista (UNESP), 13506-900, Rio Claro, SP, Brazil.,Laboratório de Herpetologia, Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), 31270-901, Belo Horizonte, MG, Brazil
| | - Luciana Bolsoni Lourenço
- LabEsC (Laboratório de Estudos Cromossômicos), Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13083-863, Campinas, SP, Brazil
| |
Collapse
|
4
|
Schneider RG, Ferro JM, Reinko IN, Boeris JM, Cardozo DE, Baldo D. Sex chromosomes in the Vizcacheras' White-lipped frog, Leptodactylus bufonius (Anura, Leptodactylidae). AN ACAD BRAS CIENC 2021; 93:e20190426. [PMID: 34105608 DOI: 10.1590/0001-3765202120190426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 06/13/2019] [Indexed: 11/21/2022] Open
Abstract
Cytogenetic analyses were performed on specimens of Leptodactylus bufonius from different localities in Argentina. Mitotic chromosomes were studied with Giemsa and differential staining techniques (Ag-NOR, C-banding, and CMA3/DAPI) and fluorescence in situ hybridization with the 18S DNAr probe. All specimens showed karyotypes with 2n = 2x = 22 and FN = 44. Secondary constrictions were present in the long arm of chromosome pair 8, coincident with Ag-NOR and hybridization signals of the 18S DNAr probe. The C-banding technique evidenced an important amount of heterochromatin with a sex-linked pericentromeric band in the short arm of chromosome pair 4. This heterochromatic band was heteromorphic in males but present in both homologues of females, and it was CMA3 positive (DAPI negative) at fluorescence staining. The occurrence of heteromorphic XY sex chromosomes in L. bufonius is the second known case in Leptodactylus and the fifth within the speciose family Leptodactylidae.
Collapse
Affiliation(s)
- Rosio G Schneider
- Laboratorio de Genética Evolutiva "Claudio Juan Bidau", Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552, 6to Piso, CPA N3300LQF, Posadas, Misiones, Argentina
| | - Juan M Ferro
- Laboratorio de Genética Evolutiva "Claudio Juan Bidau", Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552, 6to Piso, CPA N3300LQF, Posadas, Misiones, Argentina
| | - Ivana N Reinko
- Laboratorio de Genética Evolutiva "Claudio Juan Bidau", Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552, 6to Piso, CPA N3300LQF, Posadas, Misiones, Argentina
| | - Juan M Boeris
- Laboratorio de Genética Evolutiva "Claudio Juan Bidau", Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552, 6to Piso, CPA N3300LQF, Posadas, Misiones, Argentina
| | - Darío E Cardozo
- Laboratorio de Genética Evolutiva "Claudio Juan Bidau", Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552, 6to Piso, CPA N3300LQF, Posadas, Misiones, Argentina
| | - Diego Baldo
- Laboratorio de Genética Evolutiva "Claudio Juan Bidau", Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552, 6to Piso, CPA N3300LQF, Posadas, Misiones, Argentina
| |
Collapse
|
5
|
Gazoni T, Lyra ML, Ron SR, Strüssmann C, Baldo D, Narimatsu H, Pansonato A, Schneider RG, Giaretta AA, Haddad CF, Parise-Maltempi PP, Carvalho TR. Revisiting the systematics of the Leptodactylus melanonotus group (Anura: Leptodactylidae): Redescription of L. petersii and revalidation of its junior synonyms. ZOOL ANZ 2021. [DOI: 10.1016/j.jcz.2020.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
6
|
Targueta CP, Krylov V, Nondilo TE, Lima J, Lourenço LB. Sex chromosome evolution in frogs-helpful insights from chromosome painting in the genus Engystomops. Heredity (Edinb) 2020; 126:396-409. [PMID: 33184505 DOI: 10.1038/s41437-020-00385-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 12/29/2022] Open
Abstract
The differentiation of sex chromosomes is thought to be interrupted by relatively frequent sex chromosome turnover and/or occasional recombination between sex chromosomes (fountain-of-youth model) in some vertebrate groups as fishes, amphibians, and lizards. As a result, we observe the prevalence of homomorphic sex chromosomes in these groups. Here, we provide evidence for the loss of sex chromosome heteromorphism in the Amazonian frogs of the genus Engystomops, which harbors an intriguing history of sex chromosome evolution. In this species complex composed of two named species, two confirmed unnamed species, and up to three unconfirmed species, highly divergent karyotypes are present, and heteromorphic X and Y chromosomes were previously found in two species. We describe the karyotype of a lineage estimated to be the sister of all remaining Amazonian Engystomops (named Engystomops sp.) and perform chromosome painting techniques using one probe for the Y chromosome and one probe for the non-centromeric heterochromatic bands of the X chromosome of E. freibergi to compare three Engystomops karyotypes. The Y probe detected the Y chromosomes of E. freibergi and E. petersi and one homolog of chromosome pair 11 of Engystomops sp., suggesting their common evolutionary origin. The X probe showed no interspecific hybridization, revealing that X chromosome heterochromatin is strongly divergent among the studied species. In the light of the phylogenetic relationships, our data suggest that sex chromosome heteromorphism may have occurred early in the evolution of the Amazonian Engystomops and have been lost in two unnamed but confirmed candidate species.
Collapse
Affiliation(s)
- Cíntia P Targueta
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, São Paulo, 13083-863, Brazil.,Department of Genetics, Institute of Biology Science, Federal University of Goiás, Goiânia, 74960-000, Brazil
| | - Vladimir Krylov
- Faculty of Science, Department of Cell Biology, Charles University, Vinicna 7, Prague 2, 128 44, Czech Republic
| | - Tobias E Nondilo
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, São Paulo, 13083-863, Brazil
| | - Jucivaldo Lima
- Institute of Scientific and Technological Research of Amapá-IEPA, Nucleus of Biodiversity (NUBIO); Rodovia Juscelino Kubitschek, s/n, Distrito da Fazendinha, Macapá, Amapá, Brazil
| | - Luciana B Lourenço
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas, Campinas, São Paulo, 13083-863, Brazil.
| |
Collapse
|
7
|
Baldo D, Bunge MM, Barrasso DA, Boeris JM, Ferro JM, Cotichelli L, Úbeda CA, Basso NG. Rebuilding the Cytogenetics of Atelognathus (Anura: Batrachylidae): Half a Century of Confusion. HERPETOLOGICA 2020. [DOI: 10.1655/herpetologica-d-19-00050.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Diego Baldo
- Laboratorio de Genética Evolutiva, Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas Químicas y Naturales, Universidad Nacional de Misiones, N3300LQF Posadas, Misiones, Argentina
| | - María Marta Bunge
- Centro Regional Bariloche, Universidad Nacional del Comahue, R 8400 FRF, San Carlos de Bariloche, Río Negro, Argentina
| | - Diego Andrés Barrasso
- Instituto de Diversidad y Evolución Austral (IDEAus-CONICET) and Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia “San Juan Bosco,” U9120ACD Puerto Madryn, Chubut, Argentina
| | - Juan Martín Boeris
- Laboratorio de Genética Evolutiva, Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas Químicas y Naturales, Universidad Nacional de Misiones, N3300LQF Posadas, Misiones, Argentina
| | - Juan Martín Ferro
- Laboratorio de Genética Evolutiva, Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas Químicas y Naturales, Universidad Nacional de Misiones, N3300LQF Posadas, Misiones, Argentina
| | - Leonardo Cotichelli
- Instituto de Diversidad y Evolución Austral (IDEAus-CONICET) and Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia “San Juan Bosco,” U9120ACD Puerto Madryn, Chubut, Argentina
| | - Carmen Adria Úbeda
- Centro Regional Bariloche, Universidad Nacional del Comahue, R 8400 FRF, San Carlos de Bariloche, Río Negro, Argentina
| | - Néstor Guillermo Basso
- Instituto de Diversidad y Evolución Austral (IDEAus-CONICET) and Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia “San Juan Bosco,” U9120ACD Puerto Madryn, Chubut, Argentina
| |
Collapse
|
8
|
Targueta CP, Guerra V, Gambale PG, Bastos RP, Silva DDME, Telles MPDC. Cytogenetics of two hylid frogs from Brazilian Cerrado. Genet Mol Biol 2018; 41:814-819. [PMID: 30508007 PMCID: PMC6415605 DOI: 10.1590/1678-4685-gmb-2017-0382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 04/10/2018] [Indexed: 11/22/2022] Open
Abstract
Cytogenetic data can be useful for taxonomic and phylogenetic studies, as well as to provide information about chromosome evolution. Therefore, it may help design conservation priorities for some threatened species, such as anurans. Herein, we describe the karyotypes of Scinax constrictus and Ololygon centralis, native endemic species from the Brazilian Cerrado. Chromosome preparations for both species were stained with Giemsa for morphological analyses and then impregnated by the Ag-NOR method for localization of the nucleolar organizer region (NOR). Both species had 24 chromosomes, as confirmed by meiotic analyses, which showed 12 bivalents. Chromosome morphologies presented the same pattern for Scinax and Ololygon compared to species already karyotyped in both genera. The NOR was interstitially located in the long arm of pair 7 in S. constrictus, whereas in O. centralis it was found near the centromere in the long arm of pair 1, thus diverging from what is commonly found for other Ololygon species. Therefore, we provide the first description of the karyotype of O. centralis and the first report of the localization of the NOR for the karyotype of both species. Our study increases the cytogenetic knowledge in species of the genera Scinax and Ololygon, and provide support for further studies on the taxonomy, ecology, and evolution of hylid anurans.
Collapse
Affiliation(s)
- Cíntia Pelegrineti Targueta
- Laboratório de Genética & Biodiversidade, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Vinícius Guerra
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Maringá, PR, Brazil
| | - Priscilla Guedes Gambale
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Maringá, PR, Brazil
| | - Rogério Pereira Bastos
- Departamento de Ecologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Daniela de Melo e Silva
- Laboratório de Mutagênese, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Mariana Pires de Campos Telles
- Laboratório de Genética & Biodiversidade, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brazil
- Escola de Ciências Agrárias e Biológicas, Pontifícia Universidade Católica de Goiás, Goiânia, GO, Brazil
| |
Collapse
|
9
|
Mating patterns and post-mating isolation in three cryptic species of the Engystomops petersi species complex. PLoS One 2017; 12:e0174743. [PMID: 28388628 PMCID: PMC5384746 DOI: 10.1371/journal.pone.0174743] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/14/2017] [Indexed: 12/02/2022] Open
Abstract
Determining the extent of reproductive isolation in cryptic species with dynamic geographic ranges can yield important insights into the processes that generate and maintain genetic divergence in the absence of severe geographic barriers. We studied mating patterns, propensity to hybridize in nature and subsequent fertilization rates, as well as survival and development of hybrid F1 offspring for three nominal species of the Engystomops petersi species complex in Yasuní National Park, Ecuador. We found at least two species in four out of six locations sampled, and 14.3% of the wild pairs genotyped were mixed-species (heterospecific) crosses. We also found reduced fertilization rates in hybrid crosses between E. petersi females and E. “magnus” males, and between E. “magnus” females and E. “selva” males but not in the reciprocal crosses, suggesting asymmetric reproductive isolation for these species. Larval development times decreased in F1 hybrid crosses compared to same species (conspecific) crosses, but we did not find significant reduction in larval survival or early metamorph survival. Our results show evidence of post-mating isolation for at least two hybrid crosses of the cryptic species we studied. The general decrease in fertilization rates in heterospecific crosses suggests that sexual selection and reinforcement might have not only contributed to the pattern of call variation and behavioral isolation we see between species today, but they may also contribute to further signal divergence and behavioral evolution, especially in locations where hybridization is common and fertilization success is diminished.
Collapse
|
10
|
de Freitas Tallarico L, Orlandi Introíni G, Bonini A, Dias Passos F, Marcondes Machado F, Pintor de Arruda E, Recco-Pimentel SM. Spermatozoan ultrastructure and mitochondrial gene sequence ofCaryocorbula caribaea(d'Orbigny, 1853) (Corbulidae: Bivalvia), a species with plasticity in shell morphology. MOLLUSCAN RESEARCH 2015. [DOI: 10.1080/13235818.2015.1052127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
11
|
Bruschi DP, Busin CS, Toledo LF, Vasconcellos GA, Strussmann C, Weber LN, Lima AP, Lima JD, Recco-Pimentel SM. Evaluation of the taxonomic status of populations assigned to Phyllomedusa hypochondrialis (Anura, Hylidae, Phyllomedusinae) based on molecular, chromosomal, and morphological approach. BMC Genet 2013; 14:70. [PMID: 23937545 PMCID: PMC3751434 DOI: 10.1186/1471-2156-14-70] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 07/30/2013] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND The taxonomic and phylogenetic relationships of the genus Phyllomedusa have been amply discussed. The marked morphological similarities among some species hamper the reliable identification of specimens and may often lead to their incorrect taxonomic classification on the sole basis of morphological traits. Phenotypic variation was observed among populations assigned to either P. azurea or P. hypochondrialis. In order to evaluate whether the variation observed in populations assigned to P. hypochondrialis is related to that in genotypes, a cytogenetic analysis was combined with phylogenetic inferences based on mitochondrial and nuclear sequences. RESULTS The inter- and intra-population variation in the external morphology observed among the specimens analyzed in the present study do not reflect the phylogenetic relationships among populations. A monophyletic clade was recovered, grouping all the specimens identified as P. hypochondrialis and specimens assigned P. azurea from Minas Gerais state. This clade is characterized by conserved chromosomal morphology and a common C-banding pattern. Extensive variation in the nucleolar organizing region (NOR) was observed among populations, with four distinct NOR positions being recognized in the karyotypes. Intra-population polymorphism of the additional rDNA clusters observed in specimens from Barreiras, Bahia state, also highlights the marked genomic instability of the rDNA in the genome of this group. Based on the topology obtained in the phylogenetic analyses, the re-evaluation of the taxonomic status of the specimens from the southernmost population known in Brazil is recommended. CONCLUSIONS The results of this study support the need for a thorough revision of the phenotypic features used to discriminate P. azurea and P. hypochondrialis. The phylogenetic data presented here also contribute to an extension of the geographic range of P. hypochondrialis, which is known to occur in the Amazon basin and neighboring areas of the Cerrado savanna, where it may be sympatric with P. azurea, within contact zones. The misidentification of specimens may have led to inconsistencies in the original definition of the geographic range of P. azurea. The variability observed in the NOR of P. hypochondrialis reinforces the conclusion that these sites represent hotspots of rearrangement. Intraspecific variation in the location of these sites is the result of constant rearrangements that are not detected by classical cytogenetic methods or are traits of an ancestral, polymorphic karyotype, which would not be phylogenetically informative for this group.
Collapse
Affiliation(s)
- Daniel Pacheco Bruschi
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade de Campinas (UNICAMP), 13083-863 Campinas, SP, Brazil
| | - Carmen Sílvia Busin
- Laboratório de Citogenética, Instituto de Ciências Biológicas, Universidade de Passo Fundo (UPF), CEP 99001-970 Passo Fundo, RS, Brazil
| | - Luís Felipe Toledo
- Museu de Zoologia "Prof. Adão José Cardoso", Instituto de Biologia, Universidade Estadual de Campinas, 13083-863 Campinas, SP, Brazil
| | - Gilda Andrade Vasconcellos
- Departamento de Biologia, Centro de Ciências da Saúde, Universidade Federal do Maranhão, 65085-580 São Luis, MA, Brazil
| | - Christine Strussmann
- Departamento de Ciências Básicas e Produção Animal, Faculdade de Agronomia, Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso, 78060-900 Cuiabá, MT, Brazil
| | - Luiz Norberto Weber
- Departamento de Biologia, Centro de Ciências da Saúde, Universidade Federal do Maranhão, 65085-580 São Luis, MA, Brazil
| | | | - Jucivaldo Dias Lima
- Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá, Divisão de Zoologia, 68912-250 Macapá, AP, Brazil
| | - Shirlei Maria Recco-Pimentel
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade de Campinas (UNICAMP), 13083-863 Campinas, SP, Brazil
| |
Collapse
|
12
|
Rodrigues DS, Rivera M, Lourenço LB. Molecular organization and chromosomal localization of 5S rDNA in Amazonian Engystomops (Anura, Leiuperidae). BMC Genet 2012; 13:17. [PMID: 22433220 PMCID: PMC3342222 DOI: 10.1186/1471-2156-13-17] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 03/20/2012] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND For anurans, knowledge of 5S rDNA is scarce. For Engystomops species, chromosomal homeologies are difficult to recognize due to the high level of inter- and intraspecific cytogenetic variation. In an attempt to better compare the karyotypes of the Amazonian species Engystomops freibergi and Engystomops petersi, and to extend the knowledge of 5S rDNA organization in anurans, the 5S rDNA sequences of Amazonian Engystomops species were isolated, characterized, and mapped. RESULTS Two types of 5S rDNA, which were readily differentiated by their NTS (non-transcribed spacer) sizes and compositions, were isolated from specimens of E. freibergi from Brazil and E. petersi from two Ecuadorian localities (Puyo and Yasuní). In the E. freibergi karyotypes, the entire type I 5S rDNA repeating unit hybridized to the pericentromeric region of 3p, whereas the entire type II 5S rDNA repeating unit mapped to the distal region of 6q, suggesting a differential localization of these sequences. The type I NTS probe clearly detected the 3p pericentromeric region in the karyotypes of E. freibergi and E. petersi from Puyo and the 5p pericentromeric region in the karyotype of E. petersi from Yasuní, but no distal or interstitial signals were observed. Interestingly, this probe also detected many centromeric regions in the three karyotypes, suggesting the presence of a satellite DNA family derived from 5S rDNA. The type II NTS probe detected only distal 6q regions in the three karyotypes, corroborating the differential distribution of the two types of 5S rDNA. CONCLUSIONS Because the 5S rDNA types found in Engystomops are related to those of Physalaemus with respect to their nucleotide sequences and chromosomal locations, their origin likely preceded the evolutionary divergence of these genera. In addition, our data indicated homeology between Chromosome 5 in E. petersi from Yasuní and Chromosomes 3 in E. freibergi and E. petersi from Puyo. In addition, the chromosomal location of the type II 5S rDNA corroborates the hypothesis that the Chromosomes 6 of E. petersi and E. freibergi are homeologous despite the great differences observed between the karyotypes of the Yasuní specimens and the others.
Collapse
Affiliation(s)
- Débora Silva Rodrigues
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP 13083-863, Brazil
| | - Miryan Rivera
- Escuela de Ciencias Biológicas, Pontifícia Universidad Católica Del Ecuador, Quito, Ecuador
| | - Luciana Bolsoni Lourenço
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP 13083-863, Brazil
| |
Collapse
|
13
|
Karyotypic differentiation via 2n reduction and a finding of a case of triploidy in anurans of the genus Engystomops (Anura, Leiuperidae). Genetica 2012; 139:1339-47. [PMID: 22350565 DOI: 10.1007/s10709-012-9636-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 02/04/2012] [Indexed: 10/14/2022]
Abstract
The genus Engystomops is divided into two groups, namely the Duovox clade and the Edentulus clade. The species of Edentulus clade have karyotypes with 2n = 22, while E. pustulatus and E. puyango, which belong to Duovox clade, have 2n = 20. To investigate if 2n = 20 is a synapomorphy of Duovox clade, we cytogenetically analyzed all the species of this group, except for E. puyango, in the present study. All of them had 2n = 20, differing from the species of Edentulus clade. Since the species already karyotyped of the genus Physalaemus, which is considered to be the sister group of Engystomops, also have 2n = 22, we conclude that the 2n reduction is a synapomorphy of Duovox clade. Despite the karyotypes of all the species of Duovox clade were very similar, they varied in the NOR pattern. In E. coloradorum, an additional NOR was found in one homologue of the chromosome pair 10 exclusively in all females, indicating that this could possibly be a sexual pair of the ZZ/ZW system. Also in this species, it was found the first case of natural polyploidy of the genus Engystomops.
Collapse
|
14
|
Nascimento J, Quinderé YRSD, Recco-Pimentel SM, Lima JRF, Lourenço LB. Heteromorphic Z and W sex chromosomes in Physalaemus ephippifer (Steindachner, 1864) (Anura, Leiuperidae). Genetica 2010; 138:1127-32. [DOI: 10.1007/s10709-010-9501-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Accepted: 09/13/2010] [Indexed: 11/30/2022]
|