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Search Results: 1 - 10 of 181589 matches for " Marcos Deon Vilela de Resende "
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Reciprocal Recurrent Selection between Synthetic Multi Species Populations (RRSSMSP) of Eucalypt Sele o Recorrente Recíproca entre Popula es Sintéticas Multi- Espécies (SRR-PSME) de Eucalipto
Marcos Deon Vilela de Resende,Teot?nio Francisco de Assis
Pesquisa Florestal Brasileira , 2010, DOI: 10.4336/2012.pfb.57.57
Abstract: It is proposed a breeding strategy for eucalypt, which congregates in an individual desirable traits belonging to different species and capture the heterosis for growth, stemming from several pair of species of known heterotic behavior. Such strategy relies on obtaining two synthetic multi species populations and posterior reciprocal recurrent selection (RRS) between them. It is called reciprocal recurrent selection between synthetic multi species populations (RRS-SMSP) and improves the traits drought, disease resistance, volume, density, yield and lignin content. Options for making the synthetic multi species populations are presented. The RRSSMSP is suitable for applying the genomic selection. Prop e-se estratégia de melhoramento para o eucalipto, que visa contemplar, em um mesmo indivíduo, características desejáveis presentes em diferentes espécies e, simultaneamente, capitalizar heterose para crescimento, advinda de vários pares de espécies, cujas combina es s o sabidamente heteróticas. Baseia-se na obten o de duas popula es sintéticas multi-espécies e posterior sele o recorrente recíproca (SRR) entre essas. é denominada sele o recorrente recíproca entre popula es sintéticas multi-espécies (SRR-PSME) e melhora os caracteres resistência à seca e às doen as, volume, densidade, rendimento e teor de lignina. S o apresentadas op es para composi o das popula es sintéticas. A SRR-PSME é favorável também à aplica o da sele o gen mica.
Genetic improvement of forest tree species
Assis, Teot?nio Francisco;Resende, Marcos Deon Vilela de;
Crop Breeding and Applied Biotechnology , 2011, DOI: 10.1590/S1984-70332011000500007
Abstract: brazilian forestry sector is considered one of the most developed in the world, being the base for important industrial segments which use wood as raw material. tree breeding has played an important role on improving the competitiveness of brazilian forestry-based companies, especially for its positive reflexes on increasing adaptation, forestry productivity and wood quality. in spite of the importance of other forest trees for the economy, such as schizolobium, araucaria, populus and hevea, the main genera under genetic improvement in the country are eucalyptus, pinus, acacia and tectona. they are used by industries like pulp and paper, siderurgy, tannin, chips for exportation and lumber, constituting an important source of revenues for the brazilian's economy, besides their positive social and environmental impacts. this paper presents a generic approach to genetic improvement aspects of these four major genera currently undergoing breeding in brazil.
Selection via simulated individual BLUP based on family genotypic effects in sugarcane
Resende, Marcos Deon Vilela de;Barbosa, Márcio Henrique Pereira;
Pesquisa Agropecuária Brasileira , 2006, DOI: 10.1590/S0100-204X2006000300008
Abstract: the objective of this work was to propose a new selection strategy for the initial stages of sugarcane improvement, based on the methodology 'simulated individual blup (blupis)', which promotes a dynamic allocation of individuals selected in each full-sib family, using blup as a base for both the genotypic effects of the referred families and plot effects. the method proposed applies to single full-sib families or those obtained from unbalanced or balanced diallel crosses, half-sib families and self-pollinated families. blupis indicates the number of individuals to be selected within each family, the total number of clones to be advanced, and the number of families to contribute with selected individuals. correlation between blupis and true blup was 0.96, by method validation. additionally, blupis allows the identification of which replication contains the best individuals of each family.
Avalia??o genética de indivíduos e progênies de cupua?uzeiro no estado do Pará e estimativas de parametros genéticos
Alves, Rafael Moysés;Resende, Marcos Deon Vilela de;
Revista Brasileira de Fruticultura , 2008, DOI: 10.1590/S0100-29452008000300023
Abstract: this paper deals with the genotypic evaluation of theobroma grandiflorum progenies in the pará state for the characters number of fruits (nf) in four harvests, intensity of occurrence of witch's broom disease in the inflorescences (wbi) and in the fruits (wbf) and weight of branches with witch's broom (wwb). also, it presents estimates of genetic parameters that allow to infer on the genetic control and level of genetic variability in the appraised germplasm. all the characters presented considerable genetic variability, with coefficients of genetic variation varying from 27% to 88% at progenies level and from 38% to 123% at individual level. this reveals excellent possibilities for the selection in that hybrid experimental population. the estimates of individual narrow sense heritabilities, in a harvest, varied from 25% to 54% and the individual repeatabilities for nf was equal at 35%. with the four accomplished harvests the individual heritability increased to 48%, providing selective accuracy of 70%, for the individuals' selection. the gain in efficiency, when using more than five crops is practically worthless. for nf, genetic gains above 60% can be obtained with the selection of the best five individuals. individuals with annual production of 17 fruits can be selected, value which is much more superior to the general average of 10 fruits, found in the commercial plantations. superior genetic gains can be obtained with clone propagation of the best individuals in relation to the sexual propagation and for the best individual the genetic gain increases from 75.5% to 88.3%, that is to say, from 17 to almost 19 fruits per plant. this reveals a great potential for the commercial cloning of theobroma grandiflorum. for the characters vbi and vbf high individual narrow sense heritabilities were verified with values ranging from 30% to 54%. this reveals the excellent potential of the recurrent selection to improve the resistance level. it seems enough to consider in the
Mejoramiento genético y taza de autofecundación del Camu Camu arbustivo en la Amazonía Peruana
Cruz, Carlos Oliva;Resende, Marcos Deon Vilela de;
Revista Brasileira de Fruticultura , 2008, DOI: 10.1590/S0100-29452008000200031
Abstract: the camu camu (myrciaria dubia h.b.k. mc vaugh) is a well known fruit species with a high vitamin c content. it is wild and a genetic improvement program is at an early stage. this paper reports on studies of its mating system, the possible effect of the source of the pollen (self pollination or outcrossing) and the repeatability of vitamin c production in this species with implications for the genetic improvement program. the results showed a mixed mating system with both crossing and selfing, no effects of the source of the pollen, individual repeatability of 0.41, repeatability of the mean of five harvests of 0.77 and accuracy of 0.88. five to six fruit harvests is an adequate number to provide high selection efficiency. selection and cloning of the best 10 trees can provide a genetic gain of 237.5%, enhancing annual fruit production from 7.75 to 23.17 kg per plant.
Sele??o precoce intensiva: uma nova estratégia para o programa de melhoramento genético do cajueiro
Cavalcanti, José Jaime Vasconcelos;Resende, Marcos Deon Vilela de;
Revista Brasileira de Fruticultura , 2010, DOI: 10.1590/S0100-29452010000400043
Abstract: most breeding programs of perennial crops have great limitation on land availability for experimental plots. the purpose of this work is to introduce a new method here called "intensive early selection" (ies), to be used in the cashew breeding with the aim of increasing the genetic gain per area and time. it is a simple method that uses a density of plants four times higher than the traditional system and an early selection based on characters with high heritability, when the plants reach two years old. the analysis results demonstrate greater effectiveness and feasibility of applying this approach over the conventional system of breeding in this crop.
Genetic improvement of forest tree species
Teot?nio Francisco Assis,Marcos Deon Vilela de Resende
Crop Breeding and Applied Biotechnology , 2011,
Abstract: Brazilian forestry sector is considered one of the most developed in the world, being the base for important industrialsegments which use wood as raw material. Tree breeding has played an important role on improving the competitiveness ofBrazilian forestry-based companies, especially for its positive reflexes on increasing adaptation, forestry productivity and woodquality. In spite of the importance of other forest trees for the economy, such as Schizolobium, Araucaria, Populus and Hevea, themain genera under genetic improvement in the country are Eucalyptus, Pinus, Acacia and Tectona. They are used by industries likepulp and paper, siderurgy, tannin, chips for exportation and lumber, constituting an important source of revenues for the Brazilian’seconomy, besides their positive social and environmental impacts. This paper presents a generic approach to genetic improvementaspects of these four major genera currently undergoing breeding in Brazil.
Eficiência do Delineamento Experimental e Capacidade de Teste no Melhoramento Genético da Erva-Mate (Ilex paraguariensis St. Hil.) Experimental Design Efficiency and Test Ability on Erva-mate Genetic Improvement
José Alfredo Sturion,Marcos Deon Vilela de Resende
Pesquisa Florestal Brasileira , 2011, DOI: 10.4336/2012.pfb.50.3
Abstract: A sele o de plantas perenes é efetuada com base no ordenamento dos valores genéticos dos indivíduos candidatos à sele o, obtidos a partir de seus valores fenotípicos, os quais s o mais precisos quanto maior for o controle da heterogeneidade ambiental. Assim, o presente trabalho teve por objetivos estudar: 1) a capacidade do teste e a eficiência do delineamento experimental em termos de controle local, por meio da significancia do teste F de Snedecor para efeito de blocos; 2) a variabilidade espacial dentro dos blocos por meio do coeficiente de correla o intraclasse entre indivíduos de uma mesma parcela (c2); e 3) a intera o genótipo x ambiente dentro do sítio pelo coeficiente de correla o genética entre repeti es. Os dados referem-se ao peso de massa foliar obtida aos seis anos de idade, por ocasi o da terceira poda, em um teste com 141 progênies de meios-irm os de erva-mate (Ilex paraguariensis var. paraguariensis), instalado na regi o de Ivai – PR, no delineamento de blocos ao acaso com dez repeti es e parcelas lineares com seis plantas, no espa amento de 3 x 2 m. Devido a significancia do teste F entre blocos e o baixo valor para c2 (0,0799), conclui-se que, tanto o delineamento utilizado, como a capacidade do teste, foram eficientes. Já o ganho genético corrigido para o peso de massa foliar acusou uma perda de 3,48% em fun o da intera o genótipo x ambiente dentro do sítio. The perennial plant selection is based on individual genetic values predicted from phenotypic observations. The more adequate the control of environmental variability, the more accurate the prediction. This paper aimed to investigate: 1) the test ability by using the significance of Snedecor F test for block effects; 2) the spatial variability within blocks by using the plot intraclass correlation coefficient; 3) the experimental design efficiency in terms of the local control, by using the significance of Snedecor F test for block effects and the plot intraclass correlation coefficient (c2), simultaneously; 4) the genotype x environmental interaction within site, by using the genetic correlation coefficient across replications. The used data concerned to leaf weight of 141 erva-mate half sib families, grown in a randomised complete block design with 10 replications and six plants per plot spaced 3 x 2 meters. The data were collected at age six in the third leaf harvesting. The design efficiency was high and the test ability adequate, as a result of the significance of block effects and low c2 value (0.0799). There was a loss of 3.48% in ge
Genetic evaluation and deviance analysis in an unbalanced provenance and progeny test of maté Avalia o genética e análise de deviance em um teste desbalanceado de procedência e progênie de Ilex paraguariensis
José Alfredo Sturion,Marcos Deon Vilela de Resende
Pesquisa Florestal Brasileira , 2010, DOI: 10.4336/2012.pfb.62.157
Abstract: Likelihood ratio tests (LRT) were applied in an unbalanced provenance/progeny test of mate (Ilex paraguariensis A. St. Hil.). The trial was established in a randomized complete block design with seven provenances, 140 half sib families, ten blocks and six plants per linear plot. The spacing was 3 m x 2 m. The following conclusions were obtained from the deviance analysis (Anadev): all random effects and associated variance components and coefficients of determination (heritability and coefficients of determination of plots and provenances) were significant; there is enough genetic variability in both within and between provenance levels which can be adequately explored for breeding purposes. doi: 10.4336/2010.pfb.30.62.157 Em um teste combinado de procedência e progênie de erva-mate (Ilex paraguariensis A. St. Hil.), os efeitos aleatórios do modelo foram testados pelo teste da raz o de verossimilhan a (LTR). Os dados referem-se ao peso de biomassa foliar obtido aos seis anos de idade, por ocasi o da terceira poda, em um teste com sete procedências e 140 progênies de meios-irm os instalado no delineamento de blocos ao acaso, com dez repeti es de parcelas lineares com seis plantas no espa amento de 3 m x 2 m. A análise de deviance (Anadev) foi realizada e as seguintes conclus es foram obtidas: os componentes de variancia associados a todos os efeitos aleatórios
Sele o de progênies de erva-mate (Ilex paraguariensis St. Hill.) para a produtividade, estabilidade e adaptabilidade temporal de massa foliar Selection of Erva-mate Progenies for Leaf Weight Productivity, Temporal Stability and Adaptability
José Alfredo Sturion,Marcos Deon Vilela de Resende
Pesquisa Florestal Brasileira , 2011, DOI: 10.4336/2012.pfb.50.37
Abstract: O presente trabalho teve por objetivos selecionar progênies de erva-mate (Ilex paraguariensis St. Hil.) em Ivaí - PR, simultaneamente para estabilidade, adaptabilidade e produtividade de massa foliar, colhidas em três safras, com base na média harm nica a performance relativa dos valores genéticos (MHPRVG), adicionalmente, comparar os resultados com aqueles obtidos pelos métodos de Annicchiarico e de Lin & Binns. O material genético consistiu de 25 progênies de meios-irm os plantadas no delineamento de blocos ao acaso, com dez repeti es e parcelas lineares de seis plantas no espa amento de 3m x 2m. O peso de folhas foi avaliado, por árvore, aos dois, quatro e seis anos após o plantio. Houve uma altera o no ordenamento das progênies para a produ o de massa foliar ao longo das safras. Os métodos de Annicchiarico, Lin & Binns e MHPRVG selecionaram, praticamente, as mesmas progênies para os três atributos considerados. Contudo, o método HPRVG apresenta a vantagem de fornecer resultados na própria escala e medi o do caráter, os quais podem ser interpretados diretamente como valores genéticos. This paper aimed to select progenies of “erva-mate” (Ilex paraguariensis St. HiI.) in Ivai - PR based on leaf weight productivity, stability and adaptability across three harvests. This can be achieved by the method MHPRVG (harmonic average of relative performance of genetic values) which is comparable with the methods by Annichiaricco and Lin & Binns. The genetic material was constituted by 25 half sib progenies evaluated in a complete block design with ten replicates and six plants per plot, in a 3 x 2 meters spacing. Leaf weight per tree was evaluated at ages two, four and six years after planting. There were some changes in progenies ranking across harvests. The methods MHPRVG, Annichiaricco and Lin & Binns led to selection of the same progenies, considering the three attributes simultaneously. However, the MHPRVG method presented the advantage of providing results in the scale of the measured trait, which can be interpreted directly as genetic values.
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