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| Registros recuperados: 181 | |
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| Pinheiro,Fábio; Barros,Fábio de. |
| One of the largest genera of Orchidaceae in the Neotropics with about 450 species, Maxillaria presents several taxonomic uncertainties about its generic circumscription and the delimitation of species groups, mainly due to the large variability of some species. The present study aims at verifying the morphological variation and species delimitation in the Brasiliorchis picta complex, a recent new genus derived from Maxillaria, using morphometric multivariate analysis. A total of 340 specimens belonging to six species (B. chrysantha (Barb. Rodr.) R.B. Singer, S. Koehler & Carnevali, B. gracilis (Lodd.) R.B. Singer, S. Koehler & Carnevali, B. marginata (Lindl.) R.B. Singer, S. Koehler & Carnevali, B. picta (Hook.) R. Singer, S.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morphometry; Multivariate analysis; Species complex; Taxonomy. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000100003 |
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| Islabão,Gláucia Oliveira; Pinto,Marília Alves Brito; Selau,Lisiane Priscila Roldão; Vahl,Ledemar Carlos; Timm,Luís Carlos. |
| One of the largest strawberry-producing municipalities of Rio Grande do Sul (RS) is Turuçu, in the South of the State. The strawberry production system adopted by farmers is similar to that used in other regions in Brazil and in the world. The main difference is related to the soil management, which can change the soil chemical properties during the strawberry cycle. This study had the objective of assessing the spatial and temporal distribution of soil fertility parameters using principal component analysis (PCA). Soil sampling was based on topography, dividing the field in three thirds: upper, middle and lower. From each of these thirds, five soil samples were randomly collected in the 0-0.20 m layer, to form a composite sample for each third. Four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria x ananassa Duch; Soil fertility; Multivariate analysis; Temporal variability. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100017 |
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| Santos,Pablo Grahl dos; Almeida,Jaime Antonio de; Sequinatto,Letícia; Miquelluti,David José. |
| ABSTRACT The source material is one of the factors that most influence soil genesis and the mainly responsible for the nature, composition, and behavior of the soil. Given the geological complexity of the Santa Maria River basin, the objective of this study was to investigate whether the new lithologies described recently may be responsible for a greater variation in soil properties, as well as in the soil taxonomy itself. The study area is located in the municipality of Rosário do Sul, RS, Brazil at 30° 15’ 28” S and 54° 54’ 50” W, with average altitude of 132 m and climate type Cfa. This study was supported by a cartographic base composed of topographic charts, geological maps, satellite images, digital elevation models, and maps of geomorphometric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lithology; Topolithosequence; Geomorphic surfaces; Soil properties; Multivariate analysis. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100310 |
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| Pereira,Jamil de Morais; Segat,Julia Corá; Baretta,Dilmar; Vasconcellos,Rafael Leandro de Figueiredo; Baretta,Carolina Riviera Duarte Maluche; Cardoso,Elke Jurandy Bran Nogueira. |
| ABSTRACT Studies on soil quality in Araucaria forests contribute to understanding changes in this ecosystem and serve as a tool in conserving its biodiversity. The aim of this study was to evaluate the potential of soil macrofauna in discriminating native and replanted Araucaria forests for selection of soil quality indicators. Native (NF) and replanted (RF) Araucaria angustifolia forests were evaluated in three regions of the state of São Paulo, representing three true replications. Fifteen soil samples were collected in each area for evaluation of the physical, chemical, and microbiological properties and the macrofauna through use of monolith excavation and the manual screening method [Tropical Soil Biology and Fertility (TSBF) method]. In addition, we... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multivariate analysis; Biodiversity; Bioindicators. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100423 |
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| Pereira,Jamil de Morais; Baretta,Dilmar; Bini,Daniel; Vasconcellos,Rafael L. de F.; Cardoso,Elke Jurandy Bran Nogueira. |
| Araucaria angustifolia (Bert.) O. Kuntze is the main component of the Mixed Ombrophilous forest and, in the State of São Paulo, it is associated with a high diversity of soil organisms, essential for the maintenance of soil quality, making the conservation of this ecosystem a major and pressing challenge. The objective of this study was to identify the physical and chemical properties that are most closely correlated with dehydrogenase enzyme activity, basal respiration and microbial biomass under native (NF) and replanted (RF) Araucaria angustifolia forests in three regions of the state of São Paulo, in winter and summer. The main differentiating factors between the areas were also determined. Each forest was represented by three true replications; at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multivariate analysis; Soil quality; Soil chemical properties; Microbiological properties. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300003 |
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| Sanches,Juliana; Leal,Paulo Ademar Martins; Saravali,José Henrique; Antoniali,Silvia. |
| This work aims determinate the evaluation of the quality of 'Nanicão' banana, submitted to two conditions of storage temperature and three different kinds of package, using the technique of the Analysis of Principal Components (ACP), as a basis for an Analysis of Variance. The fruits used were 'Nanicão' bananas, at ripening degree 3, that is, more green than yellow. The packages tested were: "Torito" wood boxes, load capacity: 18 kg; "½ box" wood boxes, load capacity: 13 kg; and cardboard boxes, load capacity: 18 kg. The temperatures assessed were: room temperature (control); and (13±1ºC), with humidity controlled to 90±2,5%. Fruits were discarded when a sensory analysis determined they had become unfit for consumption. Peel coloration, percentages of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Musa cavendishii; Quality; Multivariate analysis. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452003000200009 |
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| Leão,Patrícia Coelho de S.; Cruz,Cosme Damião; Motoike,Sérgio Y.. |
| The objectives of this study were to evaluate the performance of cultivars, to quantify the variability and to estimate the genetic distances of 66 wine grape accessions in the Grape Germplasm Bank of the EMBRAPA Semi-Arid, in Juazeiro, BA, Brazil, through the characterization of discrete and continuous phenotypic variables. Multivariate statistics, such as, principal components, Tocher's optimization procedure, and the graphic of the distance, were efficient in grouping more similar genotypes, according to their phenotypic characteristics. There was no agreement in the formation of groups between continuous and discrete morpho-agronomic traits, when Tocher's optimization procedure was used. Discrete variables allowed the separation of Vitis vinifera and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Germplasm; Grapevine; Grape cultivars; Vitis spp.; Multivariate analysis. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452010000400026 |
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| SILVA,ADRIANA DE CASTRO CORREIA DA; SABIÃO,RAFAEL ROVERI; CHIAMOLERA,FERNANDO MARCELO; SEGANTINI,DANIELA MOTA; MARTINS,ANTONIO BALDO GERALDO. |
| ABSTRACT With recent cultivation in Brazil, the dragon fruit still have lacks related to the selection of promising materials and there are not yet commercial varieties in the country. Therefore, manual pollination cross were held in 2010, between plants of H. undatus x H. polyrhizus and H. undatus x H. setaceus. Aiming evaluate the genetic diversity of the progenies for future use in breeding program, based on cladodes characteristics, six characters were assessed: length and diameter of stem, distance between areoles, arch height, number and size of spines/areole. From the Euclidean distance matrix analysis was constructed a dendrogram by the UPGMA method. There was great variability among hybrids, and eight of them have shown promise for use in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic relationship; Multivariate analysis; Hylocereus undatus; H. polyrhizus; H. setaceus. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000100802 |
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| Leão,Patrícia Coelho de Souza; Cruz,Cosme Damião; Motoike,Sérgio Yoshimitsu. |
| The purpose of this research was to study the genetic diversity and genetic relatedness of 60 genotypes of grapevines derived from the Germplasm Bank of Embrapa Semiárido, Juazeiro, BA, Brazil. Seven previously characterized microsatellite markers were used: VVS2, VVMD5, VVMD7, VVMD27, VVMD3, ssrVrZAG79 and ssrVrZAG62. The expected heterozygosity (He) and polymorphic information content (PIC) were calculated, and the cluster analysis were processed to generate a dendrogram using the algorithm UPGMA. The He ranged from 81.8% to 88.1%, with a mean of 84.8%. The loci VrZAG79 and VVMD7 were the most informative, with a PIC of 87 and 86%, respectively, while VrZAG62 was the least informative, with a PIC value of 80%. Cluster analysis by UPGMA method allowed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grape; Multivariate analysis; Genealogy; SSR. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000300017 |
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| Amarante,Cassandro Vidal Talamini do; Ernani,Paulo Roberto; Steffens,Cristiano André; Argenta,Luiz Carlos. |
| Este trabalho objetivou identificar os atributos minerais na casca e na polpa, relacionados à severidade de "bitter pit" em maçãs 'Fuji'. Os frutos foram colhidos em pomar comercial do município de Lages-SC, e armazenados durante quatro meses em câmara fria convencional (0±0,4°C e 90-95% de umidade relativa). Posteriormente, foram separadas em quatro lotes, de acordo com a severidade de "bitter pit": nula (0 lesão/fruto), baixa (1-2 lesões/fruto), moderada (3-4 lesões/fruto) e alta (5-16 lesões/fruto), com 15 frutos (repetições) em cada nível de severidade. Os frutos de cada lote foram analisados individualmente quanto aos teores de Ca, Mg, K e N, na casca e na polpa. Na análise univariada dos teores minerais da polpa, observou-se aumento nos níveis de K e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Fruit quality; Mineral nutrition; Physiological disorder; Multivariate analysis. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000100023 |
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| Miranda,João M. D.; Bernardi,Itiberê P.; Sponchiado,Jonas; Passos,Fernando C.. |
| Investigating the Myotis levis complex is important for understanding the taxonomic status of the two subspecies currently recognized in it: Myotis levis levis (I. Geoffroy, 1824) and M. levis dinellii Thomas, 1902. Both M. levis levis and M. levis dinellii have been recently observed in sympatry in Argentina. This finding suggests that these populations might in fact correspond to distinct species rather than subspecies, as they have traditionally been designated. By using a multivariate morphometric approach, we demonstrate that M. l. levis has secondary sexual dimorphism in several measurements, with females being larger than males; sexual dimorphism was not detected in M. levis dinellii. However, we found morphometric differences between the two taxa.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morphometric; Multivariate analysis; Neotropical Myotis; Southern South America. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000500007 |
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| Fachinetto,Juliana Maria; Dall'Agnol,Miguel; Souza,Cleber Henrique Lopes de; Weiler,Roberto Luis; Simioni,Carine. |
| ABSTRACT The objective of this study was to assess the genetic diversity among accessions of Paspalum notatum based on morphological marker traits and identify those morphological traits that contribute most to the variability among accessions. Fifty-three accessions were evaluated for the following traits: length, width, color, and pubescence of sheath; length, width, insertion angle, color of midrib, and pubescence of leaves; number, length, and angle of racemes; length of flowering stems; and plant growth habit (erect or prostrate). Multivariate analysis of the quantitative morphological data based on the Mahalanobis distance and UPGMA method grouped the accessions into 19 heterogeneous clusters. The relative contribution of each trait to cluster... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forage grass; Genetic improvement; Multivariate analysis. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000900714 |
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| Vargas,Julián Andrés Castillo; Almeida,Amélia Katiane; Härter,Carla Joice; Souza,Anaiane Pereira; Fernandes,Márcia Helena Machado da Rocha; Resende,Kléber Tomás de; Teixeira,Izabelle Auxiliadora Molina de Almeida. |
| ABSTRACT The objective of this study was to investigate the multivariate relationship among body protein, fat, and macrominerals in Saanen goats of different sexes (castrated males, females, and intact males) using canonical correlation analysis. Individual records of 274 Saanen goats combined from 10 studies was used. Two sets of body constituents were established: the first one contained variables related to body protein or fat (canonical variate U) and the second contained variables related to body calcium, phosphorus, magnesium, sodium, or potassium (canonical variate V). Two canonical pairs were identified for each sex. However, irrespective of sex, first canonical pairs accounted for more than 87% of variance of the dependent variables, these only... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy goat; Multivariate analysis; Sex; Tissue composition. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100618 |
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| Registros recuperados: 181 | |
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