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Registros recuperados: 10
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A semi-automated SNP-based approach for contaminant identification in biparental Polyploid Populations of tropical forage grasses. Repositório Alice
MARTINS, F. B.; SOUZA, A. P. DE; VIGNA, B. B. Z.; VALLE, C. B. do; JANK, L.; SANTOS, M. F.; BARRIOS, S. C. L.; SIMEÃO, R. M.; CHIARI, L.; FERREIRA, R. C. U.; AONO, A. H.; MORAES, A. C. L..
Artificial hybridization plays a fundamental role in plant breeding programs since it generates new genotypic combinations that can result in desirable phenotypes. Depending on the species and mode of reproduction, controlled crosses may be challenging, and contaminating individuals can be introduced accidentally. In this context, the identification of such contaminants is important to avoid compromising further selection cycles, as well as genetic and genomic studies. The main objective of this work was to propose an automated multivariate methodology for the detection and classification of putative contaminants, including apomictic clones (ACs), self-fertilized individuals, half-siblings (HSs), and full contaminants (FCs), in biparental polyploid...
Tipo: Artigo de periódico Palavras-chave: GBS; Apomictic clones; Self fertilization; Half sibling; Allele dosage; Clustering analysis; Shiny; Principal component analysis.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1137227
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Analysis of the genetic diversity of Eucalyptus cladocalyx (sugar gum) using ISSR markers Agronomy
Ballesta, Paulina; Mora, Freddy; Contreras-Soto, Rodrigo Ivan; Ruiz, Eduardo; Perret, Sandra.
Eucalyptus cladocalyx F. Muell is a tree endemic to southern Australia and is distributed across four isolated regions: Kangaroo Island, southern Flinders Ranges, and two geographical zones in Eyre Peninsula. E. cladocalyx is capable of growing under extreme environmental conditions, including dry and saline soils. The objective of this study was to analyze genetic diversity in 45 half-sib families planted in northern Chile that are distributed across five different zones (provenances). Genetic variability was assessed using ISSR (Inter Simple Sequence Repeat) molecular markers. The results showed low levels of genetic diversity within populations (He = 0.113 to 0.268) in contrast with other Eucalyptus species. In addition, there was a significant genetic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetica; Florestal DNA pooling; Half-sib families; AMOVA; Clustering analysis.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19307
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Defining a pelagic typology of the eastern English Channel ArchiMer
Delavenne, Juliette; Marchal, Paul; Vaz, Sandrine.
Classifying marine habitats is a growing research field and is of increasing interest to spatial planners and managers. Most studies have predominantly focused on the seabed to determine benthic habitat types, and only limited attention has been paid to the water column. Classification projects aim at identifying candidate management units for the application of various regional or national regulations such as the European Water Framework Directive. Here, we propose a seasonal classification of the water column in the eastern English Channel, which we validated with biological data. For the three tested compartments, phytoplankton, zooplankton and pelagic fishes, the validation results were satisfactory, with recall values (i.e. percentage of observations...
Tipo: Text Palavras-chave: Eastern English Channel; Pelagic typology; Clustering analysis; Seasonality.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00125/23655/22689.pdf
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Estimate of genetic diversity in germplasm of elephant grass accessions in Brazil using the Gower algorithm. Repositório Alice
VIDAL, A. K. F.; DAHER, R. F.; ANDRADE, E. K. V. de; FREITAS, R. S.; STIDA, W. F.; AMARAL JÚNIOR, A. T. do; MENEZES, B. R. da S.; PEREIRA, A. V.; SILVA, V. B. da; TARDIN, F. D.; OLIVEIRA, L. J. da S. de.
Management of variability in germplasm banks is essential for genetic improvement, so that the breeder can estimate the genetic similarity between cultivars, as well as maintain genetic diversity in breeding programs. Elephant grass is a forage crop plant native to Africa of great socio-economic and environmental importance; it can be used for animal feed and for bioenergy production. Understanding the genetic variability of elephant grass is essential for breeding programs. In this context, we examined the genetic divergence of elephant grass accessions using the Gower algorithm. The experiment was conducted under field conditions in the municipality of Campos dos Goytacazes-RJ, Brazil. All 85 elephant grass accessions belonging to the Active Elephant...
Tipo: Artigo de periódico Palavras-chave: Cenchrus purpureus; Clustering analysis; Análise de agrupamento; Diversidade genética; Germoplasma; Capim Elefante; Variação Genética; Multivariate analysis; Germplasm.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1138016
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Genetic assessment of seed yield-related traits in superior hybrids of Paspalum plicatulum × Paspalum guenoarum R. Bras. Zootec.
Lopes,Rodrigo Ramos; Franke,Lucia Brandão; Souza,Cleber Henrique Lopes de; Bertoncelli,Patricia; Graminho,Larissa Arnhold; Ávila,Mariana Rockenbach de; Pereira,Emerson André; Motta,Eder Alexandre Minski da.
ABSTRACT This study aimed to estimate the genetic parameters, genetic correlations, genetic dissimilarity, and predicted gains with the selection of interspecific apomictic Paspalum plicatulum × Paspalum guenoarum hybrids in relation to seed yield traits. Nineteen genotypes that showed increased forage yield in previous studies were planted in a randomized complete block design with ten blocks. Traits evaluated in this study were: number of tillers/plant, number of reproductive tillers/plant, number of racemes/inflorescence, number of seeds/inflorescence, weight of a thousand seeds, and seed yield. Data were analyzed using a mixed model approach. The genotypes evaluated in our study showed improvement potential in relation to high heritability (H a 2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Clustering analysis; Genetic correlation; Genetic gains; Genetic parameters; REML/BLUP.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100402
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Genetic diversity and population structure assessed by SNP markers in a panel of maize inbred lines. Repositório Alice
RIBEIRO, C. A. G.; PASTINA, M. M.; GUIMARAES, L. J. M.; GUIMARAES, P. E. O.; PACHECO, C. A. P.; MAGALHAES, J. V.; PARENTONI, S. N.; BARROS, E. G.; GUIMARAES, C. T..
Tipo: Parte de livro Palavras-chave: Clustering analysis; Genética; Zea mays.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/974205
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Identification of superior genotypes and soybean traits by multivariate analysis and selection index Rev. Ciênc. Agron.
Leite,Wallace de Sousa; Unêda-Trevisoli,Sandra Helena; Silva,Fabiana Mota da; Silva,Alysson Jalles da; Mauro,Antonio Orlando Di.
ABSTRACT The selection of superior genotypes of soybean is a complex process, thus exploratory multivariate techniques can be applied to select genotypes analyzing the agronomic traits altogether, increasing the chance of success of a breeding program. Thus, the objective of this study was to select soybean genotypes carrying the RR gene with good agronomical performance through of multivariate analysis and selection index and identify those traits that influence, also verifying the agreement of multivariate techniques and selection index in the selection process. The experiment was conducted in an increased block experimental being evaluated 227 genotypes of F5 generation, which 85 of those were detected to be glyphosate-resistant by PCR. The following...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Clustering analysis; Principal components; Selection gain; Grain Yield.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300491
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MOVIES-B: an acoustic detection description software. Application to shoal species' classification ArchiMer
Weill, Alain; Scalabrin, Carla; Diner, Noel.
Software, MOVIES-B, developed by IFREMER (Institut français de recherche pour l'exploitation de la mer), enables the recognition of echogram features as acoustic detection structures according to spatial-energetic contiguity criteria. These structures (shoals, plankton layers) are described by energetic, morphological, spatial and temporal descriptors. Specifying acoustic detections as individual shoals will allow shoal by shoal echo-integration and may lead to better biomass estimation and shoal species description. The conceptual and operational framework of MOVIES-B is presented in the first part of this paper. The second part presents preliminary work performed in order to assess the feasibility of classification and possible species identification of...
Tipo: Text Palavras-chave: Echo-intégration; Banc de poissons; Acoustique halieutique; Analyse statistique; Classification hiérarchique; Echo-integration; Fish shoal; Fisheries acoustics; Statistical analysis; Clustering analysis.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00190/30078/28573.pdf
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Typology of hydrological structures modelled and observed over the Bay of Biscay shelf ArchiMer
Planque, Benjamin; Lazure, Pascal; Jegou, Anne-marie.
Collecting hydrological observations over the whole Bay of Biscay continental shelf can require several weeks. As a result, the observations are not truly synoptic and the interpretation of hydrological structures is corrupted by the time-lags between observations at distinct locations. We evaluated the effects of non-synoptic sampling during a spring cruise (17 April to 13 May 2000), using outputs from 3D hydrodynamic models as a substitute for true synoptic sampling. We developed a method for clustering hydrological regions based on the vertical structure of the water column and temporal changes in hydrography. In parallel, outputs from the 3D model were compared with field observations. The results show that in spring 2000 the Bay of Biscay continental...
Tipo: Text Palavras-chave: Typology; Spatial temporal interactions; Hydrodynamics; Clustering analysis; Bay of Biscay.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-3959.pdf
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受稻熱病菌誘導之水稻表現序列標誌(EST)的比較分析 Taiwan Agricultural Research Institute
呂秀英; 邱怡嘉; 陳政道; 魏夢麗; 呂椿棠; Hsiu-Ying Lu; Yi-Chia Chiu; Cheng-Tao Chen; Meng-Li Wei; Chun-Tang Lu.
[[abstract]]Rice blast is caused by fungus pathogen Magnaporthe grisea, which is a major destructive disease in rice production worldwide. Expressed sequence tag (EST) is the fragment of cDNA sequence. Direct study of EST is therefore helpful to obtain the gene expression information. In order to investigate the differences of gene expression patterns of rice among varieties, tissues and developmental stages after rice-blast infection, we made a comparative analysis of rice ESTs induced by M. grisea from 14 cDNA libraries in NCBI-dbEST database. For each individual library, EST functional annotation, classification and representation statistics were performed. Clustering analysis and correspondence analysis were also used to detect the differences in gene...
Palavras-chave: 水稻 稻熱病 表現序列標幟 功能註解及分類 基因表現量統計 集群分析 對應分析 Rice; Rice blast; Expressed sequence tag; Functional annotation and classification; Statistics of gene representation; Clustering analysis; Correspondence analysis [[classification]]6.
Ano: 2007
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