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| Registros recuperados: 120 | |
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| Guimarães, Amanda Gonçalves; Amaral Júnior, Antônio Teixeira do; Almeida Filho, Janeo Eustáquio de; Pena, Guilherme Ferreira; Vittorazzi, Cássio; Pereira, Messias Gonzaga. |
| The success of any recurrent selection program depends on the genetic variability of the evaluated population, which is used to refer to the diversity of existing alleles at many genetic loci. Thus, the goal of the present study was to investigate the impact of recurrent selection across nine cycles of a UENF-14 popcorn population through the analysis of genetic diversity and structure using microsatellite markers (EST-SSRs). Genomic DNA was extracted from young leaves of 25 individuals from each cycle (C0, C1 C2, C3, C4, C5, C6, C7, and C8), totaling 225 samples from the UENF-14 population. Fifty EST-SSR markers were used for the analysis of genetic diversity across the recurrent selection cycles, 16 of which were polymorphic. Thirty-four alleles were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L. var. Everta; Variability; Microsatellite markers; Heterozygosity; Equilibrium.; Melhoramento Vegetal. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35218 |
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| Guimarães, Amanda Gonçalves; Amaral Júnior, Antônio Teixeira do; Almeida Filho, Janeo Eustáquio de; Pena, Guilherme Ferreira; Vittorazzi, Cássio; Pereira, Messias Gonzaga. |
| The success of any recurrent selection program depends on the genetic variability of the evaluated population, which is used to refer to the diversity of existing alleles at many genetic loci. Thus, the goal of the present study was to investigate the impact of recurrent selection across nine cycles of a UENF-14 popcorn population through the analysis of genetic diversity and structure using microsatellite markers (EST-SSRs). Genomic DNA was extracted from young leaves of 25 individuals from each cycle (C0, C1 C2, C3, C4, C5, C6, C7, and C8), totaling 225 samples from the UENF-14 population. Fifty EST-SSR markers were used for the analysis of genetic diversity across the recurrent selection cycles, 16 of which were polymorphic. Thirty-four alleles were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.03.05-9; 2.08.04.00-8 Zea mays L. var. Everta; Variability; Microsatellite markers; Heterozygosity; Equilibrium. Melhoramento Vegetal. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35218 |
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| Vale, Welington Gonzaga do; UENF; Garcia, Ricardo Ferreira; UENF; Thiebaut, Jose Tarcísio Lima; UENF; Gravina, Geraldo de Amaral; UENF. |
| O objetivo deste trabalho foi caracterizar, estatisticamente, as variáveis patinagem dos rodados, espaço percorrido por parcela, área da parcela trabalhada, capacidade de campo teórica e efetiva de uma semeadora em sistema de semeadura direta (SD) e convencional (SC), com base na verificação do ajuste de uma série de dados a uma distribuição estatística, visando indicar a melhor forma de representação e valores a serem adotados para que estas variáveis sejam utilizadas em operações de práticas agrícolas. O experimento na SC foi realizado com velocidade de 1,5 m s-1, com 190 repetições, durante a semeadura de milho em solo classificado como Cambissolo; o experimento na SD, com 1,8 m s-1 e 58 repetições, durante a semeadura de sorgo em solo classificado... |
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Palavras-chave: 5.03.00.00-8 Engenharia Agrícola mecanização agrícola; Variabilidade; Número de amostras Mecanização agrícola agricultural mechanization; Variability; Number of samples. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/951 |
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| Luz,Viviane Kopp da; Silveira,Solange Ferreira da Silveira; Fonseca,Gabriela Magalhães da; Groli,Eder Licieri; Figueiredo,Ricardo Garcia; Baretta,Diego; Kopp,Mauricio Marini; Magalhães Junior,Ariano Martins de; Maia,Luciano Carlos da; Oliveira,Antonio Costa de. |
| ABSTRACT The increase of yield potential in new rice (Oryza sativa L.) varieties has been a major challenge for genetic improvement. The generation of mutants, followed by their characterization, constitutes a great possibility to isolate and select genes and genotypes that present agronomic traits of interest. This study aimed to evaluate the effect of chemical mutagen ethyl methane sulphonate (EMS) on agronomic traits in 340 M3 families of rice derived from BRS Querência cultivar. Seeds from each family and the original genotype BRS Querência were sown in the experimental field, and the characters main panicle length, main panicle weight, main panicle grain weight, flag leaf width and plant height were evaluated. Data were subjected to analysis of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Ethyl methane sulphonate; Mutagenic; Variability. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000100041 |
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| Lavezo,André; Cargnelutti Filho,Alberto; Bem,Cláudia Marques de; Burin,Cláudia; Kleinpaul,Jéssica Andiara; Pezzini,Rafael Vieira. |
| ABSTRACT The objectives of this study were to determine the optimum plot size (Xo) and the number of replications to evaluate grain yield and verify the variability of Xo among oat cultivars. Thirtytwo uniformity trials of 3 × 3 m were performed, being 8 from each cultivar (URS Charrua, URS Taura, URS Estampa, and URS Corona). Each uniformity trial was divided in 36 basic experimental units (BEU) of 0.5 × 0.5 m. Grain yield was determined in each BEU. The Xo was determined by the method of maximum curvature of the coefficient of variation model. Mean comparisons among cultivars were performed by the Scott-Knott test via bootstrap. The number of replications was calculated by an iterative process until convergence for experiments in completely randomized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena sativa L.; Variability; Uniformity trial; Experimental design. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000400512 |
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| Abbud,C.M.M.; Cruz,A.A.V.. |
| The Vernier acuity of 50 normal untrained subjects (20 males and 30 females) was measured by the method of adjustment. Subjects were divided into five age ranges with 10 subjects in each age group: 5-10, 11-20, 21-30, 31-40, and 41-50 years. All subjects had normal visual acuity (20/20) and volunteered to participate in the experiment. Children were selected from a local school and adults recruited from the technical staff of the Department of Ophthalmology of the School of Medicine. Vernier acuity was higher in adults compared to children. Intraindividual variability was high and it was estimated that for most individuals of all age groups a range of 100 to 700 trials was necessary to obtain a mean with a precision of 10%. These results suggest that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vernier acuity; Variability; Age. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000200011 |
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| Silva,Ana Veruska Cruz da; Amorim,Julie Anne Espíndola; Vitória,Marina Ferreira da; Ledo,Ana da Silva; Rabbani,Allivia Rouse Carregosa. |
| ABSTRACT The state of Sergipe is the largest mangaba producer, which is a fruit native to Brazil, and has cultural, social and economic importance in its area of occurrence. It is an endangered species due to human actions, and despite its economic potential, there are still no commercial plantations. The study was carried out in order to characterize trees, fruits and the genetic diversity of natural populations of mangaba in Sergipe, Brazil. Fruits from Abaís Beach/Estância (AB) presented, on average, twice the vitamin C content (414.81 mg of vit. C/100g), when compared with the others. The use of ISSR primers was efficient in estimating the genetic similarity of populations. The primers clustered the populations of mangaba according to their origin,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hancornia speciosa Gomes; Postharvest; Molecular markers; Variability. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000300255 |
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| Graminho,Larissa Arnhold; Dall’Agnol,Miguel; Pötter,Luciana; Lopes,Rodrigo Ramos; Simioni,Carine; Weiler,Roberto Luís. |
| ABSTRACT: The objective of this study was to evaluate, through meta-analysis, the forage characteristics of various species of the genus Paspalum and to use them to select the best ecotypes that can be used in artificial hybridization as parents and hybrids for pasture production and natural pasture recovery systems. Data were obtained from studies conducted by the Department of Forage Plants and Agrometeorology of the Universidade Federal do Rio Grande do Sul. Database comprised tests conducted with ecotypes and/or hybrids of Paspalum spp. in plots for evaluating total dry mass production, leaf dry mass production, and stem dry mass production by means of cuts. Total dry mass production, which included leaves and stems, differed between the ecotypes and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apomixis; Hybridization; Plant breeding; Natural pasture; Variability. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700651 |
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| González Jiménez, Vianey. |
| Se llevó a cabo una caracterización morfológica de 12 variedades de caña de azúcar del estado de Tabasco mediante descriptores morfológicos, se identificó la filogenia por medio de secuenciamiento de la región ITS de DNA ribosómico y trnL-F cloroplástico, y se hizo una caracterización molecular usando la técnica AFLP. La descripción fenotípica se llevó a cabo considerando las características de entrenudo, hoja y yema. En la amplificación del DNA ribosómico se utilizaron los iniciadores ITS4 e ITS5. Para la amplificación del cloroplasto se utilizaron los iniciadores universales trnL-F. El procedimiento para la realización de los AFLPs se realizó siguiendo las recomendaciones descritas en el Kit AFLP®Analysis System I y AFLP® Starter Primer Kit. Entre las 12... |
| Tipo: Tesis |
Palavras-chave: Caña de azúcar; AFLPs; DNA; Variabilidad; Maestría; Producción Agroaliemtaria en el Trópico; Sugarcane; Variability. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1558 |
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| Ibarra Estrada, Martha Elva. |
| A México se le considera centro de origen del zapote mamey ya que cuenta con una gran diversidad. Sin embargo, son pocos los trabajos enfocados en estudiar tal diversidad tanto en la parte morfológica, contenido de ácidos graso o aspectos moleculares. Por lo anterior, el objetivo del presente trabajo fue: caracterizar morfológica, bioquímica y molecularmente selecciones sobresalientes de zapote mamey. En base a las variables de fruto y el perfil de ácidos grasos en semilla, el material vegetal estudiado mostró amplia variación entre las accesiones. El peso y longitud de fruto, longitud de hilio y de semilla, número de fibras, grosor de epicarpio y ancho de semilla fueron las variables determinantes para la agrupación de las selecciones. El perfil de... |
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Palavras-chave: Caracterización; Frutos; Variabilidad; RAPD; RAMP; Characterization; Fruits; Lipids; Seeds; Variability; Lípidos; Semillas; Doctorado; Fruticultura. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/740 |
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| Baggio, Jacopo A.; Center for Behavior, Institutions and the Environment, Arizona State University; Department of Environment and Society, Utah State University; jbaggio@asu.edu; Rollins, Nathan D.; Center for Behavior, Institutions and the Environment, School of Human Evolution and Social Change, Arizona State University; nathan.rollins@asu.edu; Janssen, Marco A.; Center for Behavior, Institutions and the Environment, School of Sustainability, Arizona State University; Marco.Janssen@asu.edu. |
| Research on collective action and common-pool resources is extensive. However, little work has concentrated on the effect of variability in resource availability and collective action, especially in the context of asymmetric access to resources. Earlier works have demonstrated that environmental variability often leads to a reduction of collective action in the governance of shared resources. Here we assess how environmental variability may impact collective action. We performed a behavioral experiment involving an irrigation dilemma. In this dilemma participants invested first into a public fund that generated water resources for the group, which were subsequently appropriated by one participant at a time from head end to tail end. The amount of resource... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Asymmetry; Common-pool resources; Feedbacks; Laboratory experiments; Trust; Variability. |
| Ano: 2015 |
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| Registros recuperados: 120 | |
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