Consulta: subjectFacets:"Phylogenetic relationships"
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Data/hora: 11/06/2024 02:12:17

ANALISIS MOLECULAR EN GASTROPODOS CHILENOS COMERCIALES BASADOS EN LAS SECUENCIAS 16S rRNA,. COI Y ITS1-5.8S rDNA-ITS2
Provedor de dados: Gayana
Autores: Aguilera-Muñoz,Felipe; Lafarga-Cruz,Fabiola; Gallardo-Escárate,Cristian.
Gastropod mollusks are part of the principal marine resources cultivated and commercialized in Chile. There are native Chilean species such as loco (Concholepas concholepas), locate (Thais chocolata), trumulco snail (Chorus giganteus), keyhole limpets (Fissurella spp.), tegula snail (Tegula atra) as well as exotic species such as red abalone (Haliotis rufescens) and Japanese abalone (Haliotis discus hannai). Despite their importance as marine resources, molecular genetic studies establishing phylogenetic relationships and estimating population genetic parameters are scarce. The aim of this study is to establish a molecular approach among the main commercial gastropod species in Chile. The mitochondrial genes 16S rRNA and COI, and the nuclear ribosomal...
Tipo: Journal article
Palavras-chave: 16S rRNA; COI; ITSl-5.8SrDNA-ITS2; Gastropod mollusks; Phylogenetic relationships.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382009000100003

Genetic diversity and phylogenetic relationships in the rye genus Secale L. (rye) based on Secale cereale microsatellite markers
Provedor de dados: Genetics and Molecular Biology
Autores: Shang,Hai-Ying; Wei,Yu-Ming; Wang,Xiao-Rong; Zheng,You-Liang.
The genetic diversity and phylogenetic relationships in the genus Secale L. (rye) was evaluated using 24 Secale cereale microsatellite (SCM) markers. The average polymorphism information content (PIC) value of each microsatellite locus in 30 Secale accessions evaluated was higher than that in 47 cultivated ryes (Secale cereale ssp. cereale). The mean genetic similarity (GS) index in Secale was lower than that in cultivated rye. The highest within-species GS index was observed for S. sylvestre and the lowest for S. strictum, whereas the highest between-species GS index was found between S. cereale and S. vavilovii and the lowest between S. sylvestre and S. cereale. There was no obvious difference in GS levels in the cultivated rye accessions from Asia,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cultivated rye; Genetic diversity; Microsatellite markers; Phylogenetic relationships; Secale L.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000400018

Scanning electron microscopy of acrothoracican cypris larvae (Crustacea, Thecostraca, Cirripedia, Acrothoracica, Lithoglyptidae)
Provedor de dados: Naturalis Digital Academic Repository
Autores: Kolbasov, Gregory A.; Høeg, Jens T.; Elfimov, Alexei S.
Scanning electron microscopy was used to provide a full morphological description of cypris morphology in the acrothoracican species Lithoglyptes milis and L. habei (Lithoglyptidae). Special attention was given to lattice organs, antennules, thorax, thoracopods, abdomen, and furcal rami. Cypris larvae of the Acrothoracica share some putative plesiomorphic features with the cypris-like ascothoracid larvae of the non-cirripede taxon Ascothoracida. The most notable are traces of abdominal segmentation and carapace lattice organs without pore fields. Acrothoracican cyprids also share numerous synapomorphies with those of the Thoracica and the Rhizocephala. This list includes a four-segmented antennule with a triangular first segment of two sclerites set at an...
Tipo: Article / Letter to the editor
Palavras-chave: Cirripedia; Acrothoracica; Ascothoracida; Cypris larva; Morphology; Lattice organ.; SEM; Phylogenetic relationships; Larval characters.
Ano: 1999
URL: http://www.repository.naturalis.nl/record/534290

Description of a new species of skate of the genus Malacoraja Stehmann, 1970: the first species from the southwestern Atlantic Ocean, with notes on generic monophyly and composition (Chondrichthyes: Rajidae)
Provedor de dados: Neotropical Ichthyology
Autores: Carvalho,Marcelo R. de; Gomes,Ulisses L.; Gadig,Otto B. F.
The first report of a western South Atlantic soft skate, genus Malacoraja Stehmann, 1970, is described as Malacoraja obscura, new species, from the southeastern Brazilian continental slope off the states of Espírito Santo and Rio de Janeiro, in depths ranging from 808-1105 m. The new species is known from five specimens and is distinguished from congeners by its unique dorsal coloration with small, faded white spots on disc and pelvic fins, by retaining in larger specimens an irregular row of thorns along dorsal midline of tail (extending from tail base to two-thirds of tail length in 680 mm total length female), and by presenting a ventral tail midline devoid of small denticles only at base (naked region not extending posterior to pelvic fin rear margin)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rajinae; Gurgesiellini; Anatomy; Taxonomy; Systematics; Phylogenetic relationships.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000200002

The supratemporal system and the pattern of ramification of cephalic sensory canals in Denticeps clupeoides (Denticipitoidei, Teleostei): additional evidence for monophyly of Clupeiformes and Clupeoidei
Provedor de dados: Papéis Avulsos de Zoologia
Autores: Di Dario,Fabio; de Pinna,Mário C. C.
The cephalic portions of the latero-sensory canal system in Denticeps clupeoides are described and analyzed. The species, a small herring-like fish from relictual West African streams, is the most primitive living clupeomorph and sole Recent representative of suborder Denticipitoidei. As sister group to over 360 species in Clupeoidei, Denticeps is a key taxon in understanding clupeomorph and lower teleostean relationships. Observations on recently-collected specimens of Denticeps clupeoides revealed comparatively-important and previously-unrecorded details of the cephalic latero-sensory canals which are relevant for understanding relationships at different levels in clupeomorph phylogeny. The infraorbital, supraorbital, preopercular, extrascapular and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clupeiformes; Denticeps clupeoides; Latero-sensory system; Lower teleosts; Phylogenetic relationships; Postorbital bulla; Sensory biology.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492006001000001

Does the widely distributed rodent Calomys tener (Cricetidae: Sigmodontinae) constitute a single evolutionary unit?
Provedor de dados: Revista Brasileira de Zoologia
Autores: González-Ittig,Raul E.; Kandel,Narayan P.; Bonvicino,Cibele R.; Salazar-Bravo,Jorge.
ABSTRACT The nominal species Calomys tener (Winge, 1887) ranges broadly in open lands of the Caatinga, Cerrado, Pantanal and Mata Atlântica of Brazil, and was recently reported from the Pampas of southern Brazil, and in the Selva Paranaense of eastern Paraguay and northeastern Argentina. This rodent can be infected with the pathogenic Araraquara hantavirus in Brazil. Given that most epidemiological studies have not taken into account updated taxonomic findings of their rodent hosts, in this study, we obtained sequence data of the Cyt-b and COI genes of specimens of C. tener from 22 different geographical localities from throughout the currently known distribution of the species (including individuals from Argentina, Paraguay, Bolivia, and Brazil) to test...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyt-b; Phylogenetic relationships; South America.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100311

Genetic diversity of begomovirus infecting tomato and associated weeds in Southeastern Brazil
Provedor de dados: Tropical Plant Pathology: fitopatologia brasileira
Autores: AMBROZEVICIUS,LUCIANA P.; CALEGARIO,RENATA F.; FONTES,ELIZABETH P.B.; CARVALHO,MURILO G. DE; ZERBINI,F. MURILO.
The genetic diversity of begomovirus isolates from tomato (Lycopersicon esculentum) fields in the Southeastern region of Brazil was analyzed by direct sequencing of PCR fragments amplified by using universal oligonucleotides for the begomovirus DNA-A, and subsequent computer-aided phylogenetic analysis. Samples of tomato plants and associated weeds showing typical symptoms of virus infection were collected at seven locations in the states of Minas Gerais, Espírito Santo and Rio de Janeiro. A total of 137 out of 369 samples were infected with a begomovirus based on PCR analysis. Phylogenetic analysis indicated a high degree of genetic diversity among begomoviruses infecting tomatoes in the sampled area. One species (Tomato chlorotic mottle virus, TCMV)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geminiviridae; Phylogenetic relationships; Tomato chlorotic mottle virus.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000400006

Micropotamia, gen.n. of neotropical muscidae (Diptera, Azeliinae), with comments on allied azeliini genera
Provedor de dados: Zoologia
Autores: Carvalho,Claudio José Barros de.
A new genus, Micropotamia, is erected for Phaonia minuscula Albuquerque, 1955 [type-species of the genus], Phaonia cilitibia Albuquerque, 1955 and Azelia amazonica Albuquerque &amp;amp; Lopes, 1982. A key to these three species is given. The female of Micropotamia amazonica is described for the first time, from Roraima. Some character-states of phylogenetic importance and affinities with world Azeliini genera are discussed. Megophyra Emden, 1965 and Potamia Robineau-Desvoidy, 1830 are considered to be most closely related to Micropotamia, gen.n.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Muscidae; Azeliini; Phylogenetic relationships.
Ano: 1992
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751992000200009

Karyotypic studies in wild species of Arachis (Leguminosae) belonging to sections Erectoides, Procumbentes and Rhizomatosae
Provedor de dados: Boletín de la Sociedad Argentina de Botánica
Autores: Ortiz,Alejandra M; Silvestri,María C; Lavia,Graciela I.
Karyotypes of three diploid species belonging to sections Erectoides (Arachis hermannii), Procumbentes (A. rigonii) and Rhizomatosae (A. burkartii) were analyzed by Feulgen's technique. The karyotype formula was different in each of the taxa analyzed: 2n=2x=16m+4sm in A. hermannii, 2n=2x=18m+2sm in A. rigonii, and 2n=2x=20m in A. burkartii. All species had a pair of satellited chromosomes, which corresponded to type 2 in A. hermannii, type 9 in A. rigonii, and type 8 in A. burkartii. Arachis hermannii and A. rigonii presented chromosomal features similar to those of the other species included in their respective sections. However, A. burkartii showed chromosome characteristics different from those found in the rest of the species of section Rhizomatosae.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis hermannii; A. rigonii; A. burkartii; Chromosomes; Phylogenetic relationships.
Ano: 2013
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722013000200010