The first record of polyploidy in a land planarian species (Geoplana burmeisteri)

Álvarez, Luciana; Almeida, Eunice Judith Cardoso de

doi:10.1080/00087114.2002.10589283

Cited by 3 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polyploid cells were found in two Terricola species: Geoplana burmeisteri and Pasipha pasipha (Garcia et al, 1998;Alvarez and Almeida, 2002). Specimens of Microplana terrestris with aneuploid cells have been described (Ball and De Vries, 1983).…”

Section: Introductionmentioning

confidence: 99%

Comparative karyotype analysis in diploid and triploid Dolichoplana carvalhoi (Tricladida, Terricola, Rhynchodemidae) from Brazil

Álvarez

Almeida

2007

Genet. Mol. Biol.

Self Cite

View full text Add to dashboard Cite

In this work, we present cytogenetic data for the land planarian Dolichoplana carvalhoi. Two different karyotypes, one diploid (2n = 2x = 14 chromosomes) and one triploid (2n = 3x = 21 chromosomes), corresponding to two morphological body patterns, are described. Chromosomes from regenerating blastema were studied after routine Giemsa staining and CBG banding. Our analyses revealed heteromorphisms in chromosomes 2, 3 and 4 of the diploid karyotype and in chromosomes 1, 3 and 7 of the triploid karyotype. Further studies are needed in order to determine if the two morphological patterns of D. carvalhoi represent distinct species.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparative karyotype analysis in diploid and triploid Dolichoplana carvalhoi (Tricladida, Terricola, Rhynchodemidae) from Brazil

Álvarez

Almeida

2007

Genet. Mol. Biol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Assunto Táxon principal Almeida et al (1988) bio Terricola Almeida et al (1991) bio Terricola Alvarez & Almeida (1999) bio Terricola Alvarez & Almeida (2002) bio Terricola Alvarez & Almeida (2007) bio Terricola Anônimo (1987) Fiorentin & Friedrich (1985) bio Paludicola Forneris (1999) con Turbellaria div Terricola div Terricola Froehlich (1955c) bio Terricola Froehlich (1956a) div Terricola Froehlich (1956b) div Terricola Froehlich (1958) div Terricola Froehlich (1959) div Terricola Froehlich (1964) con Paludicola Froehlich (1966) bio Terricola Froehlich (1967) div Terricola E.M. div Terricola E.M. div Terricola E.M. Froehlich (1985) tec Terricola E.M. Froehlich & Froehlich (1972) div Terricola E.M. Froehlich & Leal-Zanchet (2003) div Terricola Goeldi (1894) div Terricola Graff (1896) div Terricola Graff (1899) div Terricola Guecheva et al (2001) tec Paludicola Guecheva et al (2003) tec Paludicola Guimarães & Hirano (1971) bio Paludicola Guimarães & Hirano (1973) bio Paludicola Guimarães et al (1975) bio Paludicola Hauser (1959a) bio Terricola Hauser (1959b) bio Terricola Hauser (1979) bio Paludicola Hauser (1985) bio Paludicola Hauser (1987) bio Paludicola Hauser et al (1979a) tec Paludicola Hauser et al (1979b) bio Paludicola Hauser et al (1979c) bio Paludicola Hauser et al (1980) bio …”

Section: Referênciamentioning

confidence: 99%

Estado do conhecimento dos macroturbelários (Platyhelminthes) do Brasil

Carbayo

Froehlich

2008

Biota Neotrop.

View full text Add to dashboard Cite

FROEHLICH, E.M. 2008. State of knowledge of the macroturbellarians (Platyhelminthes) from Brazil. Biota Neotrop. 8(4): http://www.biotaneotropica.org.br/v8n4/en/abstract?thematicreview+bn01908042008. Abstract:In the last decades, international efforts have increased, with the aim of acquiring greater knowledge on worldwide biodiversity and to propose adequate conservation policies. Brazil has joined in these efforts, as is shown by recent publications on the state of knowledge of several taxa of organisms. The macroturbellarians (Polycladida and Tricladida, Platyhelminthes) are part of one of the less studied faunal groups, not only in Brazil but also in other regions of the world. In the present study we inventoried the knowledge on the diversity of Brazilian macroturbellarians and make a comparison with that from the rest of the world. We also analyze the accomplishments of Brazilian taxonomists dealing with macroturbellarians, with regard to the world context. Our results show that almost all of the 246 described species are from the South-eastern and Southern regions. The number of species will increase significantly when new samples are undertaken in biomes and regions still little or non-sampled, as well as in already explored areas. Brazil is relatively well provided with specialists in relation to other countries. Nonetheless, in view of the high numbers of estimated diversity, new samples should concur with the academic formation of new taxonomists. Keywords: Turbellaria, Tricladida, Polycladida, biodiversity. CARBAYO, F. & FROEHLICH, E.M. 2008. Estado do conhecimento dos macroturbelários(Platyhelminthes) do Brasil. Biota Neotrop. 8(4): http://www.biotaneotropica.org.br/v8n4/pt/abstract?thematicreview+bn01908042008.Resumo: Nas últimas décadas tem crescido o esforço internacional para conhecer a biodiversidade mundial visando a criação de políticas públicas de conservação. O Brasil vem participando deste esforço, como evidenciam as recentes publicações sobre o estado do conhecimento de vários táxons de organismos. Os macroturbelários (Polycladida e Tricladida, Platyhelminthes) fazem parte da fauna mundialmente menos estudada. Neste trabalho inventariamos por regiões a diversidade da fauna brasileira conhecida de macroturbelários e comparamos esta diversidade com a do resto do mundo. Analisamos também a atividade dos taxonomistas brasileiros do grupo no contexto mundial. Os resultados mostram que praticamente a totalidade das 246 espécies nominais descritas procede das regiões Sudeste e Sul. O número de espécies deverá aumentar significativamente quando forem feitas novas coletas, tanto em biomas e regiões ainda pouco ou nada explorados quanto nas áreas já amostradas. O Brasil está, relativamente a outros países, bem provido de especialistas. No entanto, em face da grande diversidade estimada, as amostragens deveriam ocorrer concomitantemente com a formação de novos especialistas. Palavras-chave: Turbellaria, Tricladida, Polycladida, biodiversidade.

show abstract

Assignment of Homoeologs to Parental Genomes in Allopolyploids for Species Tree Inference, with an Example from Fumaria (Papaveraceae)

et al. 2015

View full text Add to dashboard Cite

There is a rising awareness that species trees are best inferred from multiple loci while taking into account processes affecting individual gene trees, such as substitution model error (failure of the model to account for the complexity of the data) and coalescent stochasticity (presence of incomplete lineage sorting [ILS]). Although most studies have been carried out in the context of dichotomous species trees, these processes operate also in more complex evolutionary histories involving multiple hybridizations and polyploidy. Recently, methods have been developed that accurately handle ILS in allopolyploids, but they are thus far restricted to networks of diploids and tetraploids. We propose a procedure that improves on this limitation by designing a workflow that assigns homoeologs to hypothetical diploid ancestral genomes prior to genome tree construction. Conflicting assignment hypotheses are evaluated against substitution model error and coalescent stochasticity. Incongruence that cannot be explained by stochastic mechanisms needs to be explained by other processes (e.g., homoploid hybridization or paralogy). The data can then be filtered to build multilabeled genome phylogenies using inference methods that can recover species trees, either in the face of substitution model error and coalescent stochasticity alone, or while simultaneously accounting for hybridization. Methods are already available for folding the resulting multilabeled genome phylogeny into a network. We apply the workflow to the reconstruction of the reticulate phylogeny of the plant genus Fumaria (Papaveraceae) with ploidal levels ranging from 2[Formula: see text] to 14[Formula: see text]. We describe the challenges in recovering nuclear NRPB2 homoeologs in high ploidy species while combining in vivo cloning and direct sequencing techniques. Using parametric bootstrapping simulations we assign nuclear homoeologs and chloroplast sequences (four concatenated loci) to their common hypothetical diploid ancestral genomes. As these assignments hinge on effective population size assumptions, we investigate how varying these assumptions impacts the recovered multilabeled genome phylogeny.

show abstract

The first record of polyploidy in a land planarian species (Geoplana burmeisteri)

Cited by 3 publications

References 10 publications

Comparative karyotype analysis in diploid and triploid Dolichoplana carvalhoi (Tricladida, Terricola, Rhynchodemidae) from Brazil

Comparative karyotype analysis in diploid and triploid Dolichoplana carvalhoi (Tricladida, Terricola, Rhynchodemidae) from Brazil

Estado do conhecimento dos macroturbelários (Platyhelminthes) do Brasil

Assignment of Homoeologs to Parental Genomes in Allopolyploids for Species Tree Inference, with an Example from Fumaria (Papaveraceae)

Contact Info

Product

Resources

About