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| Registros recuperados: 34 | |
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| Gómez Martínez, Procoro. |
| Pinus patula Schiede ex Schltdl. et. Cham., es una especie nativa de México ampliamente utilizada en plantaciones comerciales en diferentes regiones del mundo; la especie ha sido mejorada en el extranjero, y es necesario evaluar el material al ser reintroducido a su país de origen. Se comparó el crecimiento de 36 familias de medios hermanos seleccionadas en Colombia y Sudáfrica, reintroducidas en México (grupo R) y 36 familias de medios hermanos escogidas fenotípicamente en rodales naturales (grupo N), en dos sitios con ambientes contrastantes: Aquixtla, Puebla, a 2,930 m (S1) y Acaxochitlán, Hidalgo, a 2,260 m (S2). Se midió el diámetro normal, la altura total y el volumen del fuste a los siete y ocho años de edad, y la conformación del árbol y el número... |
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Palavras-chave: Análisis de estabilidad; Correlación genética tipo B; Crecimiento; Ganancia genética; Heredabilidad; IGA; Parámetros genéticos; Pinus patula; Progenies; Reintroducción; Adaptation; Ecovalence; Genetic stability; Genetic gain; Genetic parameters; Growth rate; GEI; Heritability; Progeny test; Type-B genetic correlation; Reintroduction; Forestal; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1892 |
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| Torres Morales, Braulio. |
| Para determinar el efecto de la selección recurrente para alto contenido de aceite se evaluaron tres sintéticos de maíz de grano amarillo en tres localidades del estado de Chiapas en el ciclo de temporal Primavera-Verano 2008; estos sintéticos provienen de tres ciclos de selección producto de la recombinación de las mejores 50 familias de medios hermanos (FMH). Durante el desarrollo del cultivo y al momento de la cosecha se tomaron datos de las variables agronómicas; en las tres localidades se tomaron muestras de grano de cada una de las parcelas las cuales se analizaron en laboratorio para determinar el contenido de aceite y la proporción de las estructuras en el grano. De las muestras de dos localidades también se tomó una submuestra para determinar el... |
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Palavras-chave: Selección recurrente; Ganancia genética; Contenido de aceite; Ácidos grasos; Recurrent selection; Genetic gain; Oil content; Fatty acids; Maestría; Genética. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/86 |
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| Torres Morales, Braulio. |
| Para determinar el efecto de la selección recurrente para alto contenido de aceite se evaluaron tres sintéticos de maíz de grano amarillo en tres localidades del estado de Chiapas en el ciclo de temporal Primavera-Verano 2008; estos sintéticos provienen de tres ciclos de selección producto de la recombinación de las mejores 50 familias de medios hermanos (FMH). Durante el desarrollo del cultivo y al momento de la cosecha se tomaron datos de las variables agronómicas; en las tres localidades se tomaron muestras de grano de cada una de las parcelas las cuales se analizaron en laboratorio para determinar el contenido de aceite y la proporción de las estructuras en el grano. De las muestras de dos localidades también se tomó una submuestra para determinar el... |
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Palavras-chave: Selección recurrente; Ganancia genética; Contenido de aceite; Ácidos grasos; Recurrent selection; Genetic gain; Oil content; Fatty acids; Maestría; Genética. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/86 |
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| Santos,Paulo Eduardo Telles dos; Paludzyszyn Filho,Estefano; Silva,Lorenzo Teixeira de Melo da; Vandresen,Paula Burigo. |
| Abstract The aim of this study was to evaluate Eucalyptus badjensis concerning the genetic variation for growth traits and the potential of the species in supporting a breeding programme. The field trial was a provenance/progeny test established in Campina da Alegria, Santa Catarina, Brazil (latitude 26°52′05.1″ S, longitude 51°48′47.5″ W, altitude 1,015 m) in a soil classified as Latossolic Alumino-Ferric Brown Nitosol. The experiment comprised 60 open-pollinated progenies from the provenances Glenbog and Badja State Forest, New South Wales, Australia. Ten replicates and plots with six plants in row were used. At the age of 17 years, 279 trees were assessed for diameter of the bole at breast height (DBH), total tree height (H) and volume of wood with bark... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalypt; Progeny test; Genetic parameters; Breeding; Genetic gain. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000400457 |
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| NASCIMENTO FILHO, F. J. do; ATROCH, A. L.; CRAVO, M. da S.. |
| O objetivo e discriminar os clones quanto a produtividade e ao numero de colheitas baseado nos resultados referentes aos ensaios avancados, ou seja, aqueles que antecedem a recomendacao dos materiais, no periodo de 1985 a 1994. Para isso, foram realizadas analises de variancia individuais, para cada experimento, e uma analise de variancia conjuntas, para cada experimento, e uma analise combinada, envolvendo todos os clones, experimentos e anos. |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Melhoramento genetico; Brasil; Amazonas; Manaus; Genetic gain; Cloning; Harvest.; Colheita; Clonagem; Guaraná; Paullinia Cupana.. |
| Ano: 2000 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/670823 |
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| Costa, Reginaldo Brito da; Azevedo, Luana Pâmella de Almeida; Martinez, Diego Tyszka; Tsukamoto Filho, Antonio de Arruda; Fernandes, Dayane Ávila; Oliveira, Oacy Eurico de; Resende, Marcos Deon Vilela de. |
| The study aimed to estimate parameters, values and genetic gain for growth traits in progenies of Eucalyptus camaldulensis, in the State of Mato Grosso. The progenies test was conducted under a randomized block design with 132 progenies, five replications and three plants in single rows, spaced 3 m x 2 m in Santo Antonio do Leverger, MT. At 24 months of age, progenies were evaluated for the characters: a) diameter at base height (DBH), in centimeters, b) total height, in meters, c) survival. The individual in the narrow sense heritability for the traits studied can be considered medium to high magnitude (0.13 and 0.21) for height and diameter, respectively. The heritability for survival were practically nil, due to low genetic variability among the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic variability; Genetic gain; Early selection; Mixed linear model Variabilidade genética; Ganho genético; Seleção precoce; Modelo linear misto. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/337 |
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| Kalil Filho, Antonio Nascim; Hirano, Elcio; Sturion, José Alfredo; Sousa, Valderês Aaparecida de; Marzollo, Luiz Gustvo; Nicolotti, Filipe; Ukan, Daniele. |
| Exploitation of imbuya (Ocotea porosa) occurred at the same time of Araucaria angustifolia. Imbuya is threatned of extinction, owns a valuable wood and for these characteristics, Embrapa Florestas, located at Colombo, State of Paraná, Brazil, decided to make efforts for its conservation ex-situ. Collects in Southern Brazil at the localities of Caçador, Canoinhas (State of Santa Catarina), Colombo and Bocaiúva do Sul (State of Paraná) were realized. A complete randomized design was used in 12 months age seedlings. In this experiment, height of thirty one progenies ordered in plots of five plants with four replications was measured. The general mean for height was 16,55 cm. The additive genetic variance estimate was 72,03, the heritability coefficient... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Selection; Germplasm; Genetic gain; Genetic parameters; Breeding Seleção; Germoplasma; Ganhos genéticos; Parâmetros genéticos; Melhoramento. |
| Ano: 2004 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1591 |
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| Paludzyszyn Filho, Estefano; Shimoyama, Vanilda R. S.; Mora, Admir Lopes. |
| The objective of this work was to study the efficiency of the early selection of parents and progeny for simultaneous increment of the growth and wood quality. For this, 48 open-pollinated families of Pinus taeda were grown at close spacing (0,5m x 0,5m). At the age of 16 months they were assessed for stem diameter at 30 cm above the ground and for wood basic density. The data were compared to diameter at breast height and basic density of commercial stem of the same progenies at 84 months under field conditions. Phenotypic and genetic parameters were estimated using an individual tree model. The narrow sense heritabilities in the 16º and 84º month for diameter (h2 = 0,24 e 0,22) and density (h2 = 0,27 e 0,19) suggest that they are inherited. The aditive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Juvenile-mature correlation; Genetic gain; Tree breeding; Genetic correlation Correlação juvenil-adulto; Ganho genético; Melhoramento florestal; Densidade básica. |
| Ano: 2003 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1616 |
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| Rodrigues,Osmar; Lhamby,Julio César Barreneche; Didonet,Agostinho Dirceu; Marchese,José Abramo. |
| The objective of this study was to assess the impact of genetic breeding on grain yield, and to identify the physiological traits associated to the increment in yield and their related growth processes, for wheat cultivars grown in Southern Brazil, in the past five decades. Seven wheat cultivars released between 1940 and 1992, were compared for physiological aspects associated with grain yield. Grain yield, biological yield, biomass partitioning, harvest index and grain yield components were also determined. The number of grains per square meter was more affected by plant breeding and was better correlated with grain yield (r = 0.94, p<0.01) than with grain weight (r = -0.39ns). The higher number of grains per square meter was better correlated with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Genetic gain; Harvest index; Yield components. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000600008 |
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| Streck,Eduardo Anibele; Magalhães Júnior,Ariano Martins de; Aguiar,Gabriel Almeida; Facchinello,Paulo Henrique Karling; Perin,Lais; Fagundes,Paulo Ricardo Reis; Oliveira,Antônio Costa de. |
| Abstract: The objective of this work was to determine the genetic progress of grain quality attributes of flooded irrigated rice (Oryza sativa) cultivars in the state of Rio Grande do Sul, Brazil, between 1972 and 2016. The genetic estimates followed an approach based on the comparative analysis of 25 cultivars released by Embrapa’s breeding program over this period. The experiment was implemented in four producing regions of the state of Rio Grande do Sul: Sul, Campanha, Planície Costeira Interna, and Planície Costeira Externa. The following significant genetic gains were observed: 0.20% per year, for percentage of whole grains after processing; -1.38% per year, for percentage of chalky kernels and white-core grains; -0.77% per year, for total chalky... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Breeding; Chalky area; Chalky kernels; Genetic gain; Industrial yield. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400453 |
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| Moura,Vicente Pongitory Gifoni; Dvorak,William Stephen. |
| Pinus caribaea var. hondurensis (Sénécl) Barr. & Golf. is a tropical pine that naturally occurs in lowland areas of Belize, El Salvador, Guatemala, Honduras, Nicaragua, and eastern Mexico. It has been one of the most studied tropical pines and the one with the most commercial importance in Brazil. The objective of this work was to select the best provenances for plantations and best trees in families for the establishment of seed orchards. For that a trial with five provenances and 47 open-pollinated families was planted near Planaltina, Federal District, in the Cerrado Region of Brazil. The provenances tested were Poptun (Guatemala), Gualjoco, Los Limones, El Porvenir and Santa Cruz de Yojoa (Honduras) and assessed at 12 years of age. Poptun and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pinus; Selection criteria; Genetic gain; Heritability; Breeding methods. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000200003 |
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| Schmidt,GS; Figueiredo,EAP de; Ledur,MC; Alves,HJ. |
| This study used 300 females and 30 males with 36 weeks of age from the selected PP and control PPc maternal broiler lines. PP has been selected for heavy body weight (PC) and high egg production for eight generations. Fertile eggs were collected and weighed individually for 4 periods of 5 consecutive days at two-week intervals. In each period, a total of 960 eggs/line were identified and separated in groups of 240 eggs, and stored for later incubation. Embryo weight (PE) was evaluated at 9 (P9), 11 (P11), 13 (P13), 15 (P15), 17 (P17) and 21 (P21) days of incubation. The objective was to estimate the effect of selection on embryo development. Egg weight (PO) was similar between the two lines. The differences in PE were significant from P15 on, resulting in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Correlation; Egg weight; Embryo weight; Genetic gain; Meat lines. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000200006 |
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| Schmidt,GS; Figueiredo,EAP. |
| This experiment aimed at evaluating the effect of genetic selection on embryo development of two male broiler lines (LL and LLc). LL line was selected for eight generations for growth, carcass, and reproduction traits. The LLc line was derived from LL line in 1985, and kept under a random mating system with no selection. Fertile eggs were collected and individually weighed for four periods of five consecutive days, with two-week intervals. For every period, a total of 960 eggs/line were identified and separated in four groups of 240 eggs, and then stored for subsequent incubation. At 9 (P9), 11 (P11), 13 (P13), 15 (P15), 17 (P17) and 21 (P21) days of incubation, eggs and embryos were weighed (EmW). Egg weight (EgW) was similar between the two lines. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Correlation; Egg weight; Embryo weight; Genetic gain; Meat lines. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100003 |
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| Grisi,Mara Cecília de Mattos; Junqueira,Nilton Tadeu Vilela; Conceição,Leo Duc Haa Carson Schwartzhaupt da; Faleiro,Fábio Gelape; Braga,Marcelo Fideles; Vilela,Michelle Souza. |
| Abstract The interspecific introgression of resistance genes to diseases in commercial varieties through interspecific crosses has been adopted as a strategy in breeding programs of sour passion fruit. This work aimed to evaluate 11 progenies of multispecific hybrids obtained from crosses involving seven Passiflora species, in addition to four commercial cultivars, using the REML/BLUP method. The experiment was carried out as a randomized block design with six repetitions and three plants per plot. Ten fruit traits were evaluated. The additive, multiplicative, and sum of ranks indexes were applied to determine the most appropriate selective strategy in the simultaneous increase of fruit weight, number of fruits, and yield. Plants from the 325 x VAO... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passion fruit; Genetic breeding; Genetic gain; Plant selection. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452021000100802 |
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| Caires,Dirlane Novais; Malhado,Carlos Henrique Mendes; Souza,Laaina de Andrade; Teixeira Neto,Milton Rezende; Carneiro,Paulo Luiz Souza; Martins Filho,Raimundo. |
| The objective of this study was to evaluate the history of the Tabapuã breed in Northeastern Brazil by determining its population structure and genetic progress. Pedigree information from animals born in the period between 1965 and 2006 and weight-adjusted data at 205 (W205), 365 (W365) and 550 (W550) days of age for bovines born between 1975 and 2006 were used. The (co)variance components and genetic value were estimated using the application MTDFREML. Also, the software ENDOG was used for pedigree analysis and parameter estimation based on the probabilities of gene origin, inbreeding and average generation interval. The heritability coefficients for direct genetic effects were 0.21±0.03, 0.26±0.04 and 0.36±0.05 for W205, W365 and W550, respectively.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic gain; Generation interval; Inbreeding effective size. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800008 |
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| MacNeil,Michael D.. |
| ABSTRACT The objective of this research was to discern the contribution of genomic information to multiple-trait breeding objectives and thus understand the economic value of that information. True genetic values were simulated for each of n, possibly correlated, traits. These true genetic values, combined with uncorrelated random noise, resulted in both genomic and phenotypic estimated breeding values, EBVg and EBVp, respectively. The separate EBV were then merged (blended) as a function of their respective accuracies to produce a unified EBV for each of the n traits. Finally, for each simulated animal (N = 10000), the sum of products of economic weights and EBV was calculated to predict the economic value (net merit) of the individual. Accuracies of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal breeding; Assisted selection; Genetic gain; Production system. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001200794 |
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| Registros recuperados: 34 | |
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