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Accuracy and simultaneous selection gains for N-stress tolerance and N-use efficiency in maize tropical lines Scientia Agricola
Mendonça,Leandro de Freitas; Granato,Ítalo Stefanine Correia; Alves,Filipe Couto; Morais,Pedro Patric Pinho; Vidotti,Miriam Suzane; Fritsche-Neto,Roberto.
ABSTRACT Maize plants can be N-use efficient or N-stress tolerant. The first have high yields in favorable environments but is drastically affected under stress conditions; whereas the second show satisfactory yields in stressful environments but only moderate ones under optimal conditions. In this context, our aim was to assess the possibility of selecting tropical maize lines that are simultaneously N-stress tolerant and N-use efficient and check for differences between simultaneous selection statistical methods. Sixty-four tropical maize lines were evaluated for Nitrogen Agronomic Efficiency (NAE) and Low Nitrogen Tolerance (LNTI) response indices and two per se selection indices, Low Nitrogen Agronomic Efficiency (LNAE) and Harmonic Mean of Relative...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abiotic stress; Correlation between traits; Winter maize; Mixed models.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000600481
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Adaptability and stability of erect cowpea genotypes via REML/BLUP and GGE Biplot Bragantia
Santos,Adriano dos; Ceccon,Gessi; Teodoro,Paulo Eduardo; Correa,Agenor Martinho; Alvarez,Rita de Cássia Félix; Silva,Juslei Figueiredo da; Alves,Valdecir Batista.
ABSTRACT The objective of this study was to investigate the association between the GGE Biplot and REML/BLUP methods and select cowpea genotypes that meet simultaneously high grain yield, adaptability and stability in the Mato Grosso do Sul environments. The experiments were carried out from February to July 2010, 2011 and 2012 in the municipalities of Dourados, Aquidauana and Chapadão do Sul. The experiments in Chapadão do Sul were conducted only in the years of 2010 and 2011, totaling eight environments. After detecting significant genotypes × environments (GE) interaction, the adaptability and the phenotypic stability of cowpea genotypes were analyzed by GGE Biplot and REML/BLUP methods. These methods were concordant in the identification of the best...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vigna unguiculata; Multivariate analysis; Mixed models; Genotypes × environments interaction.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300299
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Adaptability and stability of flood-irrigated rice cultivars released to the subtropical region of Brazil PAB
Streck,Eduardo Anibele; Magalhães Júnior,Ariano Martins de; Fagundes,Paulo Ricardo Reis; Aguiar,Gabriel Almeida; Facchinello,Paulo Henrique Karling; Oliveira,Antônio Costa de.
Abstract: The objective of this work was to estimate the effects of genotype x environment interaction and the genetic potential of flood-irrigated rice cultivars, released between 1972 and 2017, for the state of Rio Grande do Sul, Brazil. The experiments were carried out in the field, in all agroclimatic regions of flood-irrigated rice crop in the state, between the 2005/2006 and 2015/2016 crop years, totaling 60 environments (trials), with 1,961 experimental units. Twenty-five cultivars of irrigated rice were evaluated for the traits grain yield, plant height, days to flowering, and whole grain quality after milling. The values of adaptability and stability were estimated with the aid of mixed models. The rice cultivars BRS Pampa, BRS Pampeira, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa; Genotype x environment interaction; Mixed models; Plant breeding; Zoning of cultivars.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001001140
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Adaptability and stability of wheat genotypes according to the phenotypic index of seed vigor PAB
Szareski,Vinícius Jardel; Carvalho,Ivan Ricardo; Kehl,Kassiana; Levien,Alexandre Moscarelli; Nardino,Maicon; Dellagostin,Simone Morgan; Demari,Gustavo Henrique; Lautenchleger,Francine; Villela,Francisco Amaral; Pedó,Tiago; Souza,Velci Queiróz de; Aumonde,Tiago Zanatta.
Abstract: The objective of this work was to evaluate the adaptability and multi-trait stability of wheat (Triticum aestivum) genotypes according to the phenotypic index of seed vigor (PIV). Thirty wheat genotypes were grown in seven environments in the state of Rio Grande do Sul, Brazil, during one crop season. In each environment, a randomized complete block design with three replicates was used. The PIV was elaborated from the following traits: first germination count, germination percentage, accelerated aging, and electrical conductivity. The evaluated phenotypic index makes it possible to define macroenvironments for the production of wheat seeds with high physiological potential and to understand the implications of the genotype x environment...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Accelerated aging; AMMI; Electrical conductivity; Mixed models; Seed quality.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600727
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Adaptability, stability, and genetic divergence of conilon coffee in Alto Suaçuí, Minas Gerais, Brazil. Repositório Alice
SILVA, V. A.; MACHADO, J. L.; OLIVEIRA, A. L. de; FIGUEIREDO, U. J. de; CARVALHO, G. R.; FERRAO, M. A. G.; GUIMARÃES, R. J..
The objective of this study was to describe the genetic parameters, adaptability, and stability of clones from the Coffea canephora variety ?Vitória Incaper 8142?, and the genetic divergence between them. Following 12 and 24 months of plant growth, several traits were evaluated, including stem diameter, plant height, canopy diameter, number of plagiotropic branches, and number of nodes per plagiotropic branch. The agronomic performance of four crops was determined using measurements of productivity, yield, percentage of floating grains, and grade of the beans. Variability was observed between the clones for the majority of the traits measured. The clones V7, V10, V12, and V13 were the most stable and displayed the highest degree of adaptation for the...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Mixed models; MHPRVG method; Genetic dissimilarity; Coffea canephora; Clones.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1081798
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Agronomic performance and genetic dissimilarity of second-harvest soybean cultivars using REML/BLUP and Gower’s algorithm Bragantia
Follmann,Diego Nicolau; Souza,Velci Queiróz de; Cargnelutti Filho,Alberto; Demari,Gustavo Henrique; Nardino,Maicon; Olivoto,Tiago; Carvalho,Ivan Ricardo; Silva,Antonio David Bortoluzzi; Meira,Daniela; Meier,Carine.
ABSTRACT The cultivation of second-harvest with soybean crop after first-harvest with maize crop has become an alternative to aggregate income to farmers in the South region of Brazil. However, there is little information about this cropping system in this region. The aims of this study were to: (i) evaluate the agronomic performance of soybean (Glycine max L.) cultivars growing in second-harvest during the summer; and (ii) evaluate the genetic divergence of the cultivars based on qualitative and quantitative traits. To do this, 18 soybean cultivars were evaluated in three field trials, sown during January in the northwestern region of Rio Grande do Sul state, Brazil. In each experiment, a randomized block design with four replicates was used. Five...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max L.; Mixed models; Quantitative and qualitative traits; UPGMA.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200197
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Agronomic performance of modern soybean cultivars in multi-environment trials PAB
Matei,Gilvani; Benin,Giovani; Woyann,Leomar Guilherme; Dalló,Samuel Cristian; Milioli,Anderson Simionato; Zdziarski,Andrei Daniel.
Abstract: The objective of this work was to evaluate the productive performance, and the adaptability and stability parameters of modern soybean (Glycine max) cultivars in multi-environment trials, as well as to identify the ideal genotypes for eight growing environments in Brazil. A randomized complete block experimental design was carried out, with three replicates, for the evaluation of 46 soybean cultivars in eight environments, in the microregions of adaptation 102, 201, and 202, in the 2014/2015 crop season. A complex genotype x environment interaction occurred, with changes in the ranking of genotypes among locations. The NA 5909 RG, M6410IPRO, NS 5959 IPRO, NS6823RR, M5917IPRO, NS 6767 RR, and 6563RSF IPRO cultivars showed the highest mean yields....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Adaptability and stability; Genotype x environment interaction; GGE biplot; Mixed models.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000700500
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Alternatives for analysis of performance data and ranking of Charolais x Nellore crossbred bulls in performance tests R. Bras. Zootec.
Toral,Fábio Luiz Buranelo; Alencar,Maurício Mello de.
It was evaluated alternatives for analysis of performance records and ranking of Charolais x Zebu crossbred bulls. Data of weight at six ages and average daily weight gain in eight periods of 883 21/32 Charolais + 11/32 Nellore bulls in performance tests were used. The direct additive genetic values were predicted in single trait analysis using animal models with classificatory fixed effects of contemporary groups and age of dam at calving and age of animal at weighing as linear covariable, depending on the trait. As random effects, it was considered the direct additive genetic effect, the permanent maternal environmental and residual effects for all traits. Phenotypic values adjusted for fixed effects included in the model of each trait were also...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crossbred bulls; Least square; Mixed models; Selection.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000700013
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Análise de associação genômica ampla baseada em conjunto de genes: implementação em R. Repositório Alice
GUERREIRO, A. T.; HIGA, R. H..
O objetivo deste trabalho é a criação de um pacote R (R CORE TEAM, 2014) que implemente quatro diferentes métodos de GSEA no contexto de GWAS, considerando adaptações para aplicação em espécies animais de interesse para a agricultura.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Polimorfismo de nucleotídeo único; Modelos mistos; Genome Wide Association Studies; Random forests; Mixed models; Single nucleotide polymorphisms.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1009826
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Análise genética em genótipos de manga rosa via REML/BLUP. Repositório Alice
MAIA, M. C. C.; RESENDE, M. D. V. de; OLIVEIRA, L. C. de; VASCONCELOS, L. F. L.; LIMA NETO, F. P..
O objetivo desse trabalho foi realizar uma seleção precoce com base nas características agro-industriais dos genótipos que compõem a população base do programa de melhoramento da manga rosa da Embrapa Meio-Norte. Foi utilizado o procedimento padrão de avaliação genotípica REML/BLUP (máxima verossimilhança residual ou restrita/melhor predição linear não viciada) na estimação de componentes de variância e a predição dos valores genotípicos. As estimativas dos coeficientes de repetibilidade foram altos e medianos expressando grande estabilidade para as variáveis em diferentes frutos. As estimativas de repetibilidade individual variaram de 43% a 77%. Para obtenção de um coeficiente de determinação do valor genotípico de 90% são necessárias 10, 5 e 3 medições,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Ganho genético; Modelo misto; Mangifera indica; Genetic gains; Mixed models.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1017659
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Bioenergetic potential and genetic diversity of elephantgrass via morpho-agronomic and biomass quality traits. Repositório Alice
ROCHA, J. R. do A. S. de C. R.; MACHADO, J. C.; CARNEIRO, P. C. S.; CARNEIRO, J. da C.; RESENDE, M. D. V. de; LEDO, F. J. da S.; CARNEIRO, J. E. de S..
Elephantgrass has been a notable option as bioenergy plant. However, for its bioenergetic use, the quan-tification of genetic diversity based on biomass quality traits has not been commonly reported in theliterature. The objective of this study was to quantify the genetic diversity among 100 accessions of theActive Elephantgrass Germplasm Bank (BAGCE), by means of morphological (flowering, height, vigor andstalk diameter), agronomic (total dry biomass) and biomass quality traits (dry matter concentration, cel-lulose, lignin, hemicellulose, in vitro digestibility, nitrogen, ash, and calorific value), and the ultimate goalwas to use the elephantgrass as a bioenergy feedstock. By using mixed model methodology and geneticdiversity analyses, it was found...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Pennisetum purpureum; Bioenergy; Ethanol; Combustion; Mixed models.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1069723
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Bioenergetic potential and genetic diversity of elephantgrass via morpho-agronomic and biomass quality traits. Repositório Alice
ROCHA, J. R. do A. S. de C.; MACHADO, J. C.; CARNEIRO, P. C. S.; CARNEIRO, J. da C.; RESENDE, M. D. V. de; LEDO, F. J. da S.; CARNEIRO, J. E. DE S..
Elephantgrass has been a notable option as bioenergy plant. However, for its bioenergetic use, the quantification of genetic diversity based on biomass quality traits has not been commonly reported in the literature. The objective of this study was to quantify the genetic diversity among 100 accessions of the Active Elephantgrass Germplasm Bank (BAGCE), by means of morphological (flowering, height, vigor and stalk diameter), agronomic (total dry biomass) and biomass quality traits (dry matter concentration, cellulose, lignin, hemicellulose, in vitro digestibility, nitrogen, ash, and calorific value), and the ultimate goal was to use the elephantgrass as a bioenergy feedstock. By using mixed model methodology and genetic diversity analyses, it was found...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Pennisetum purpureum; Bioenergy; Combustion; Mixed models; Ethanol.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1072202
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Breeding new sugarcane clones by mixed models under genotype by environmental interaction. Repositório Alice
GONÇALVES, G. M.; VIANA, A. P.; AMARAL JUNIOR, A. T. do; RESENDE, M. D. V. de.
Sugarcane (Saccharumspp.) is one of the most important crops cultivated in the tropics and subtropics and plays a signifi cant economic and environmental role in Brazil. Twenty- four new clones were evaluated in different locations as potential models for recommendation as new varieties. The mixed model methodology, using the harmonic mean of the relative per- formance of genetic values (MHPRVG), facilitated the analysis of genotypic stability and adapt- ability, culminating in the recommendation of clones for each location. MHPRVG ranked clones RB92579, RB867515, SP81-3250, RB947520 and RB931530 as the best fi ve, and, addition- ally, clones with greater genotypic potential were identifi ed for each test in the six localities.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Saccharum; Cana de açúcar; Melhoramento genético; Clone; Modelo misto; Sugarcane; Mixed models.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/984456
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Desempenho genotípico de clones de batata via modelos mistos. Repositório Alice
SILVA, G. O. da; CARVAL, A. D. F. de; SOUZA, Z. da. S.; PONIJALEKI, R. S.; PEREIRA, A. da S..
2016
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Mixed models; Reml/Blup; Tuber yield; Solanun tuberosum L.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1062203
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Early selection in sugarcane family trials via BLUP and BLUPIS procedures. Repositório Alice
OLIVEIRA, R. A. de; DAROS, E.; RESENDE, M. D. V. de; BESPALHOK FILHO, J. C.; José Luis Camargo Zambon; RUARO, L..
The objective of this study was to compare early selection in sugarcane families through the best linear unbiased prediction (BLUP) and simulated individual best linear unbiased prediction (BLUPIS) procedures. We tested 80 full-sib families in an incomplete block experimental design. Statistical analyses were performed using the mixed model methodology. The following traits were determined from the first rattoon: tons of stalks per hectare (TSH), percentage of soluble solids w/w in the juice (Brix), and tons of brix per hectare (TBH). Variance components were estimated by restricted maximum likelihood (REML), and the genotypic values of the families were predicted by BLUP and BLUPIS. The BLUPIS procedure suggested the selection of 30 families with a total...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Saccharum; Cana de açucar; Melhoramento vegetal; Modelo misto; Seleção de famílias; Famílias de irmãos-germanos; Plant breeding; Mixed models; Family selection; Full-sib families; BLUP; BLUPIS.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/974624
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Early selection in sugarcane family trials via BLUP and BLUPIS procedures - doi: 10.4025/actasciagron.v35i4.16430 Agronomy
Oliveira, Ricardo Augusto de; Universidade Federal do Paraná; Daros, Edelclaiton; Universidade Federal do Paraná; Resende, Marcos Deon Vilela de; Empresa Brasileira de Pesquisa Agropecuária; Bespalhok Filho, João Carlos; Universidade Federal do Paraná; Zambon, José Luis Camargo; Universidade Federal do Paraná; Ruaro, Lucimeris; Universidade Federal do Paraná.
The objective of this study was to compare early selection in sugarcane families through the best linear unbiased prediction (BLUP) and simulated individual best linear unbiased prediction (BLUPIS) procedures. We tested 80 full-sib families in an incomplete block experimental design. Statistical analyses were performed using the mixed model methodology. The following traits were determined from the first rattoon: tons of stalks per hectare (TSH), percentage of soluble solids w/w in the juice (Brix), and tons of brix per hectare (TBH). Variance components were estimated by restricted maximum likelihood (REML), and the genotypic values of the families were predicted by BLUP and BLUPIS. The BLUPIS procedure suggested the selection of 30 families with a total...
Tipo: Pesquisa científica e procedimentos de seleção de plantas Palavras-chave: 5.01.03.05-9 Saccharum spp.; Plant breeding; Mixed models; Family selection; Full-sib families Melhoramento Vegetal.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16430
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Estimação de componentes de variância e predição de valores genéticos pelo método da máxima verossimilhança restrita (Reml) e melhor predição linear não viciada (Blup) em Pinus. Repositório Alice
RESENDE, M. D. V. de; PRATES, D. F.; YAMADA, C. K.; JESUS, A. de..
Foram comparados três procedimentos de estimação de componentes de variância visando a predição de valores genéticos: quadrados mínimos (LS), máxima verossimilhança (ML) e máxima verossimilhança restrita (REML). A estimação pelo método ML apresentou convergência mais rápida do que pelo método REML. As herdabilidades obtidas pelos métodos ML e REML foram bastante similares e de magnitudes superiores à obtida pelo método LS. O procedimento REML, embora computacionalmente mais complicado, foi o mais preciso. A seleção e estimação de ganhos genéticos devem ser realizadas a partir do procedimento REML iteragindo nas equações de modelo misto (BLUP).
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Maxima verossimilhanca; Inferencia estatistica; Modelos mistos; Parametros geneticos; Maximum likelihood; Statistical inference; Mixed models; Genetic parameters.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/handle/doc/282154
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Estimating variance components in Stata AgEcon
Marchenko, Yulia V..
This article gives a brief overview of the popular methods for estimating variance components in linear models and describes several ways to obtain such estimates in Stata for various experimental designs. The article’s emphasis is on using xtmixed to estimate variance components. Prior to Stata 9, loneway could be used to estimate variance components for one-way random-effects models. For other experimental designs, variance components could be computed manually using saved results after anova. The latter approach is viable but requires tedious computations for complicated experimental designs. Instead, as of Stata 9, variance components are easily obtained by using xtmixed.
Tipo: Journal Article Palavras-chave: Variance components; Experimental design; ANOVA; REML; ML; Multilevel; Random coefficients; Mixed models; Research Methods/ Statistical Methods.
Ano: 2005 URL: http://purl.umn.edu/117553
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Estimativa de parâmetros genéticos, análise de trilha e seleção em bucha vegetal para caracteres agronômicos. Repositório Alice
BLIND, A. D.; VALENTE, M. S. F.; LOPES, M. T. G.; RESENDE, M. D. V. de.
O objetivo deste trabalho foi estimar parâmetros genéticos e realizar estudos de associação entre caracteres de interesse agronômico em 24 acessos de bucha vegetal (Luffa cylindrica L.) provenientes de sete Estados brasileiros, com o intuito de selecionar genótipos potencialmente promissores para serem introduzidos em programas de melhoramento da cultura. Foram avaliados nove caracteres relacionados a produção e a qualidade de frutos e fibras de importância econômica para a espécie. A presença de variabilidade genética e altas herdabilidades em nível de médias (0,70 - 0,99) indicaram a possibilidade de ganhos expressivos com a aplicação da seleção fenotípica para os caracteres de interesse. Ganho genético de 42,79% foi obtido para produção de fibras após...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Luffa cylindrica; Ganho genético; Herdabilidade; Modelos mistos; Genetic gain; Mixed models; Heritability.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1100076
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Genetic evaluation and selection index in tetraploid Brachiaria ruziziensis. Repositório Alice
SIMEÃO, R.; SILVA, A.; VALLE, C.; RESENDE, M. D.; MEDEIROS, S..
Half-sib progenies of congo signal grass (Brachiaria ruziziensis Germain & Evrard, syn.: B. eminii, Urochloa ruziziensis) were analysed using a mixed model methodology. The objective was to estimate genetic and phenotypic parameters, predict individual genetic values, estimate correlations between characters associated with biomass production and forage nutritive value and use this information to determine the economic weights to compare three multiplicative selection indices. Individual narrow-sense heritabilities corrected for inbreeding varied from 0.14 to 0.91 for characters associated with biomass production and from 0.04 a 0.24 for nutritional value characters. The correlations among characters associated with annual biomass production were of...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Valor nutricional; Genetic parameters; Mixed models; Planta forrageira; Parâmetro genético; Teste de progenie; Brachiaria; Forage grasses; Nutritive value; Progeny testing; Tropical grasslands; Yelds.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1061778
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