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| Registros recuperados: 30 | |
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| Santos,Alexandra Inês; Ribeiro,Ricardo Pereira; Vargas,Lauro; Mora,Freddy; Alexandre Filho,Luiz; Fornari,Darci Carlos; Oliveira,Sheila Nogueira de. |
| The objective of this study was to estimate genetic parameters for survival and weight of Nile tilapia (Oreochromis niloticus), farmed in cages and ponds in Brazil, and to predict genetic gain under different scenarios. Survival was recorded as a binary response (dead or alive), during harvest time in the 2008 grow-out period. Genetic parameters were estimated using a Bayesian mixed linear-threshold animal model via Gibbs sampling. The breeding population consisted of 2,912 individual fish, which were analyzed together with the pedigree of 5,394 fish. The heritabilities estimates, with 95% posterior credible intervals, for tagging weight, harvest weight and survival were 0.17 (0.09-0.27), 0.21 (0.12-0.32) and 0.32 (0.22-0.44), respectively. Credible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oreochromis niloticus; Correlation; Fish genetic improvement; Gibbs sampling; GIFT strain; Heritability. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000100005 |
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| Lopes,Ana Daniela; Scapim,Carlos Alberto; Machado,Maria de Fátima Pires da Silva; Mangolin,Claudete Aparecida; Silva,Tereza Aparecida; Cantagali,Liriana Belizário; Teixeira,Flávia França; Mora,Freddy. |
| Information on genetic diversity is essential to the characterization and utilization of germplasm. The genetic diversity of twenty-two sweet corn cultivars (seventeen open-pollinated varieties, OPV, and five hybrids, H) was investigated by applying simple sequence repeat markers. A total of 257 primers were tested, of which 160 were found to be usable in terms of high reproducibility for all the samples tested; 45 were polymorphic loci, of which 30 were used to assess the genetic diversity of sweet corn cultivars. We detected a total of 86 alleles using 30 microsatellite primers. The mean polymorphism was 82 %. The highest heterozygosity values (Ho = 0.20) were found in the PR030-Doce Flor da Serra and BR427 III OPVs, whereas the lowest values (0.14) were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Simple sequence repeats; Neighbor-joining; Maize germplasm. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000600513 |
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| Mora,Freddy; Scapim,Carlos Alberto. |
| El objetivo de este estudio fue evaluar el comportamiento de siete poblaciones de maíz ( Zea mays L.) tipo roseta, o palomita, de la raza Avati Pichinga , establecidas en diferentes localidades de Brasil y Paraguay. Se determinó la mejor predicción lineal no sesgada empírica (EBLUP), con estimaciones de parámetros de covarianza vía método de máxima verosimilitud restringida (REML), en características de importancia comercial y agronómica. Se investigaron diez modelos con diferentes estructuras de covarianzas en la matriz intergenotípica. Los criterios de información de Akaike y Bayesiano de Schwarz se utilizaron para la comparación entre los modelos. Las estructuras de covarianza escogidas fueron Diagonal de tres bandas para el rendimiento de granos,... |
| Tipo: Journal article |
Palavras-chave: Estructuras de covarianzas; Rendimiento; Capacidad de expansión. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072007000200003 |
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| Mora,Freddy; Palma-Rojas,Claudio; Jara-Seguel,Pedro. |
| Se analizaron placas metafásicas mitóticas de Eucalyptus globulus Labill. y Eucalyptus cladocalyx F. Muell. Los cromosomas se observaron mediante aplastado de meristemas radiculares, previamente tratados con 8-Hidroxiquinolina y teñidos con la reacción de Feulgen. Las dos especies mostraron un cariotipo 2n = 22, con un nivel de simetría 1A y con tamaños cromosómicos que variaron entre 0,68 y 2,03 m m. El tamaño cromosómico promedio difirió significativamente al comparar entre E. globulus (1,42 m m) y E. cladocalyx (1,02 m m) (P < 0,01). El mayor tamaño cromosómico de E. globulus sugiere una mayor cantidad de ADN, originado probablemente por alteraciones cromosómicas estucturales. Este patrón de evolución del cariotipo estaría asociado, además, con un... |
| Tipo: Journal article |
Palavras-chave: Cromosoma; Citogenética vegetal. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072005000100002 |
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| Minuzzi,Andréia; Mora,Freddy; Sedrez Rangel,Marco Antônio; De Lucca e Braccini,Alessandro; Scapim,Carlos Alberto. |
| El objetivo del presente estudio fue evaluar características fisiológicas, contenido de aceite y de proteínas en las semillas de cuatro cultivares de soya (Glycine max (L.) Merr.)) (BRS 133, BRS 206, BRS 239 y CD 202), colectadas en cuatro épocas (estado R7, 7, 14 y 21 días después de la primera época) y producidas en dos sitios, Sidrolândia (21º00 lat. Sur, 55º01 long. Oeste), y Dourados (22º11 lat. Sur, 54º55 long. Oeste) del Estado de Mato Grosso do Sul, Brasil, en la temporada agrícola 2004-2005. Se utilizó un diseño experimental de bloques completos al azar con tres repeticiones y con tratamientos en parcelas subdivididas. Las semillas fueron evaluadas a través de pruebas de germinación, envejecimiento acelerado y emergencia de las plantas en... |
| Tipo: Journal article |
Palavras-chave: Germinación; Atraso de cosecha; Cultivares. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072007000400003 |
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| Mora,Freddy; Arriagada,Osvin. |
| ABSTRACT The objective of this study was to present a classification proposal for coefficients of variation (CV) in Eucalyptus experiments, aiming at providing a useful tool for experiments involving growth, survival and wood quality traits. Ninety-four studies were selected from a search for peer-reviewed journals yielding a total of 508 data. The CVs were classified as low, moderate, high and very high. The mean, standard deviation, maximum and minimum values, skewness and kurtosis were estimated to describe the distribution shape. The Shapiro-Wilk test confirmed that all variables satisfied the assumption of normality (p < 0.05). The results indicated that the growth traits had the highest variability, being variables strongly affected by the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus spp.; Experimental accuracy; Experimental error; Rank-ordering. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300263 |
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| Kurosawa,Railan do Nascimento Ferreira; Vivas,Marcelo; Amaral,Antonio Teixeira do; Ribeiro,Rodrigo Moreira; Miranda,Samila Barbosa; Pena,Guilherme Ferreira; Leite,Jhean Torres; Mora,Freddy. |
| ABSTRACT Compared with the common corn, popcorn shows greater susceptibility to pests and diseases occurrence, being the use of resistant cultivars the most efficient strategy. In this regard, Germplasm Banks deserve special attention because they contain accessions that can be used as sources of resistance in breeding programs. The State University of Northern Rio de Janeiro (UENF) maintains a popcorn Germplasm Bank with accessions from tropical and temperate countries, including Diversity Centers for the species. In this study, we investigated the performance of 37 popcorn accessions landraces, hybrids, and inbreed lines ― from the Germplasm Collection of UENF’s Popcorn Breeding Program with respect to the fungal leaf diseases northern leaf blight (NLB)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Northern leaf blight; Genetic resistance; Plant breeding. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100036 |
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| Tapia C,Francisco; Mora,Freddy; Santos,Alexandra I. |
| There is increasing interest in the development of intensively managed olive orchards (Olea europaea L.) in northern Chile. The selection of specific varieties that perform well on a particular site is considered crucial to maximizing productivity. The present study was undertaken to evaluate the productive performance of 29 varieties of olive in the Huasco Valley (28°34' S, 70°47' W), Northern Chile.The traits evaluated were: mean olive production per tree considering a longitudinal (PML) analysis over a period of five years, 2003 to 2007, total olive production in the same period (PA03-07) and alternate bearing index (ABI). The effect of variety was highly significant (p < 0.01) for all traits. In the field trial, IAP was moderate (0.52), with PML... |
| Tipo: Journal article |
Palavras-chave: Olive fruit; Alternate bearing. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300004 |
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| Mora,Freddy; Perret,Sandra; Scapim,Carlos Alberto; Arnhold,Emmanuel. |
| Acacia species have valuable agronomic characteristics, such as the tolerance to unfavorable environmental conditions. In this study, genetic parameters and selection response in Acacia saligna shrubs were investigated in two arid environments of northern Chile: Cuz-Cuz and El Tangue. The quantitative traits were assessed in 5 year-old shrubs. A Bayesian approach, implemented using Gibbs sampling algorithm, was used in the data analysis. The tree survival was 87.3% and 81.8% in Cuz-Cuz and El Tangue, respectively, confirming the potential of A. saligna in northern Chile. The estimates of posterior mode of the heritability ranged from h2=0.13 (survival) to h2=0.25 (shrub crown diameter). Estimated genetic gain (individual tree selection) ranged from 6 to... |
| Tipo: Journal article |
Palavras-chave: Drylands; Fodder production; Acacia saligna; Multipurpose trees; Bayesian analysis. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200001 |
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| Paredes,Kelly; Delaveau,Catherine; Carrasco,Pedro; Baeza,Carlos; Mora,Freddy; Uribe,Matilde E. |
| K. Paredes, C. Delaveau, P. Carrasco, C. Baeza, Freddy Mora, and M.E. Uribe. 2014. In vitro bulbing for the propagation of Traubia modesta (Amaryllidaceae), a threatened plant endemic to Chile. Cien. Inv. Agr. 41(2): 207-214. Critically endangered, Traubia modesta is endemic to Chile and belongs to the family Amaryllidaceae. In this research, a propagation protocol was developed for the in vitro cultivation of vegetative organs for this species. The twin scale explants were cultured in a Murashige and Skoog (MS) medium, supplemented with the growth regulators naphthaleneacetic acid (NAA) and 6-benzylaminopurine (BAP) in different concentrations. Plant preservative mixture (PPM) and polyvinyl pyrrolidone (PVP) were used as a biocide and an antioxidant,... |
| Tipo: Journal article |
Palavras-chave: Bulbing; Critically endangered species; In vitro propagation; Traubia modesta; Twin scales. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000200007 |
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| Arnhold,Emmanuel; Soriano Viana,José Marcelo; Mora,Freddy; Vieira Miranda,Glauco; Gonçalves Silva,Ricardo. |
| The aim of the study was to assess inbreeding depression and determine genetic components in landrace populations of popcorn. Six Brazilian popcorn landraces: Amarelo, Beija-Flor, Branco, Rosa-claro, Roxo and Viçosa, were subjected to self-pollination. Experiments with SO populations and their selfing populations (SI) were conducted in a randomized complete block design. The estimates of inbreeding depression varied from 1.2% (popping expansion) to 79% (grain yield). The gene action was predominantly additive for plant height, ear height and hundred-grain-weight. The dominance genetic effects were important for index of prolificacy and grain yield. The genetic effect of popping expansion was bidirectional with nuil dominance and a predominance of additive... |
| Tipo: Journal article |
Palavras-chave: Zea mays L; Mprovement; Popping expansion; Popcorn; Genetic variance. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000300011 |
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| Rodovalho,Marcos de Araújo; Mora,Freddy; Santos,Elisangela Mendes dos; Scapim,Carlos Alberto; Arnhold,Emmanuel. |
| Durante la evaluación genética de 169 familias de medios hermanos de maíz-roseta de granos blancos (Zea mays), en el inicio de un programa de mejoramiento genético (Ciclo I) conducido en el sur de Brasil, se detectaron diferencias significativas (p < 0,01) en la sobrevivencia. Consecuentemente, la sobrevivencia se incorporó dentro del programa de mejoramiento. El objetivo principal de este estudio fue examinar parámetros genéticos para la sobrevivencia, y su asociación con otras características agronómicas. Para cumplir con este objetivo se usó un enfoque Bayesiano, vía el algoritmo de Gibbs (para selección de plantas individuales) y algoritmo de cadenas independientes (para la selección de familias). La sobrevivencia (medida como una característica... |
| Tipo: Journal article |
Palavras-chave: Algoritmo de Gibbs; Cadenas independientes; Maíz-roseta de granos blancos; Sobrevivencia; Valores genéticos; Zea mays. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000300008 |
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| Registros recuperados: 30 | |
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