|
|
|
Registros recuperados: 15 | |
|
| |
|
| |
|
|
Fritsche-Neto,Roberto; Souza,Thiago Lívio Pessoa Oliveira de; Pereira,Helton Santos; Faria,Luís Cláudio de; Melo,Leonardo Cunha; Novaes,Evandro; Brum,Itaraju Junior Baracuhy; Jannink,Jean-Luc. |
ABSTRACT: Despite important biotic stresses to common bean, Anthracnose (ANT) and Angular Leaf Spot (ALS) can cause losses of up to 80 % and occur in more than 60 countries around the world. Genetic resistance is the most sustainable strategy to manage these diseases. Thus, we aimed to (1) identify new SNP markers associated with ALS and ANT resistance loci in elite common bean lines, and (2) provide a functional characterization of the DNA sequences containing the identified SNP markers. We evaluated 60 inbred lines, under field conditions, which represent the elite germplasm developed by the Embrapa common bean breeding program across 22 years, in terms of severity of the ALS and ANT. The lines were genotyped with 5,398 SNPs. Then, a Mixed Linear Model... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colletotrichum lindemuthianum; Pseudocercospora griseola; Disease resistance; Elite lines; Marker-assisted selection. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400321 |
| |
|
|
Vale,Júlio César Do; Soares,Plínio César; Cornélio,Vanda Maria Oliveira; Reis,Moizés Souza; Borges,Vanderley; Bisi,Rayane Barcelos; Soares,Antônio Alves; Fritsche-Neto,Roberto. |
O objetivo desse estudo foi quantificar o ganho genético para produtividade de grãos do programa de melhoramento do arroz irrigado de Minas Gerais, no período de 1998 a 2010. Foram utilizados dados dos ensaios comparativos avançados realizados em quatro localidades diferentes de Minas Gerais. Nem todos os locais foram contemplados em todos os anos agrícolas e para estimativas com maior acurácia, utilizou-se o método de modelos mistos. O ganho genético para produtividade de grãos no período considerado foi de 107,42 kg ha-1, o que representou uma proporção de 17,88% da estimativa total do progresso. Esse ganho correspondeu ao aumento de 8,95 kg ha-1 ano-1, ou ainda, aumento de 1,99% em produtividade de grãos por ano. Apesar de o ganho genético ter sido... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Progresso genético; Obtenção de cultivares; REML/BLUP. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000400002 |
| |
|
|
Caixeta,Débora Santos; Fritsche-Neto,Roberto; Granato,Ítalo Stefanine Correia; Oliveira,Lucimar Rodrigues de; Galvão,João Carlos Cardoso. |
Several studies to evaluate nitrogen use efficiency (NUE) have been carried out using early growth stages. However, there are no scientific reports on the ideal stage for evaluation and on which characteristics have the highest correlation with the NUE at that stage. The aim therefore was to identify the phenological stages and secondary characteristics which maximize accuracy in early indirect selection for NUE in maize. To do this, three endogamic maize strains were evaluated in a completely randomised design with five replications, in a triple factorial scheme (strains x N levels x phenological stage), at two contrasting nitrogen levels: low and high nitrogen. The plants were evaluated at five growth stages: stage nine (V9), with 14 fully-developed... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Path analysis; Abiotic stress; Plant breeding. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200369 |
| |
|
| |
|
| |
|
| |
|
|
DoVale,Júlio César; Fritsche-Neto,Roberto. |
The improvement phosphorus use efficiency (PUE) allows to reach satisfactory yields with lower costs. A breeding strategy for PUE is to increase its components, the phosphorus acquisiton efficiency (PAE) and phosphorus utilization efficiency (PUtE). Thus, this study aimed to identify: i) the relative importance of the components of PUE, in high and low phosphorus; ii) the relationship of root system length and shoot dry mass (SDM) with PUE and its components and; iii) the genetic control of traits associated with the PUE. Forty-one hybrid combinations were evaluated in two experimental environments representing contrasting conditions of availability of phosphorus: low (LP) and high (HP). A randomized block design with two replications were used in simple... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Genic effect; Abiotic stress; Mixed Models. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300018 |
| |
|
| |
|
| |
|
|
DoVale,Júlio César; Fritsche-Neto,Roberto; e Silva,Paulo Sérgio Lima. |
Este trabalho teve por objetivo a elaboração de um índice que permita a seleção acurada de cultivares de milho com aptidão tanto para a produção de minimilho quanto para de milho verde. Os experimentos foram realizados no ano agrícola de 2002/2003 com dez cultivares comerciais de milho em dois experimentos. O primeiro quanto ao rendimento de minimilho e o segundo quanto ao de milho verde, delineados em blocos ao acaso com três repetições. A importância relativa dos caracteres estudados foi estimada por meio do método dos componentes principais e o agrupamento destes foi realizado pela análise de fatores. O seguinte índice foi obtido: I = 0,031 NEM + 0,013 MEM + 0,207 NEV + 0,243 MEV - 0,16 AP - 0,058 MFP, em que, NEM, MEM, NEV, MEV, AP e MFP são o número e... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Componentes principais; Análise de fatores; Zea mays L. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052011000400008 |
| |
|
|
Caixeta,Débora Santos; Fritsche-Neto,Roberto; Batista,Lorena Guimarães; Carvalho,Humberto Fanelli; DoVale,Júlio César; Lanes,Éder Cristian Malta de; Miranda,Glauco Vieira. |
The objective of this study was to determine the relationship between heterosis and genetic divergence for phosphorus use efficiency (PUE) in tropical maize. It was used two groups of genitors, each consisting of seven lines, contrasting with each other in the nitrogen and phosphorus use efficiency. It was obtained 41 hybrid combinations between these groups, which were evaluated in low phosphorus. Randomized complete block design with two replications was used. For obtaining the components of variance and the breeding values were used REML/BLUP method. In the genotyping of the parental lines were used 80 microsatellite markers. Through the correlation between genetic distance obtained by the markers and specific combining ability it was not possible to... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dissimilarity; Abiotic stress; Molecular markers; Combining ability. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000100011 |
| |
|
|
Matias,Filipe Inácio; Sabadin,José Felipe Gonzaga; Moreira,Lílian Angélica; Gomes,Marcos Henrique Feresin; Mira,Acácio Bezerra de; Fritsche-Neto,Roberto; Otto,Rafael. |
ABSTRACT New apps have changed the traditional way of learning and teaching; they are also applied as a quickly executed and effective method in agriculture. Soil-app is a web application with a friendly click-point interface built through packages lodged in R software. The app is an advanced model of an open-source platform to support teaching and learning activities in soil analyses and fertilizer recommendations. Soil-app includes soil test interpretation, soil amendment calculations (lime and gypsum), the fertilizer rate for the most important crops in Brazil, an NPK blend calculator, and NPK blend evaluation. It also includes experimental statistical analysis as applied to soil science. Soil-app is a user-friendly and high-performance tool, garnering... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Software; Fertilizers; Recommendation; Prediction; Statistical analyses. |
Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000101404 |
| |
|
|
Morais,Pedro Patric Pinho; Sousa,Massaine Bandeira e; Galli,Giovanni; Andrade,Luciano Rogério Braatz e; Fritsche-Neto,Roberto; Oliveira,Aluízio Borém de. |
Abstract: The objective of this work was to examine the possibility of using yield components and reproductive, physiological, and root traits in early selection for nitrogen use efficiency (NUE) in corn. Sixty-four inbred lines were evaluated under two nitrogen fertilization levels: ideal and low. The evaluations were performed at three phenological stages: eight fully-expanded leaves, tasseling stage, and physiological maturity. It is possible to select superior lines for NUE, but the yield components did not show differential behavior under the different nitrogen levels evaluated. Root, reproductive, and physiological traits are not promising for early selection of corn lines with high NUE. Likewise, the eight-leaves and tasseling stages were not... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Abiotic stress; GBlup; Indirect selection; Path analysis; Selection index. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000500620 |
| |
Registros recuperados: 15 | |
|
|
|