Antonio Costa de Oliveira

Antonio Costa de Oliveira
Universidade Federal de Pelotas | UFPEL · Department of Plant Sciences

PhD

About

448
Publications
83,482
Reads
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10,561
Citations
Citations since 2016
113 Research Items
5047 Citations
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
Additional affiliations
February 2006 - July 2007
University of Georgia
Position
  • Research Associate
January 1994 - present
Universidade Federal de Pelotas/Federal University of Pelotas
Position
  • Professor (Full)
January 1992 - April 1996
Purdue University
Position
  • PhD Student

Publications

Publications (448)
Article
Full-text available
The occurrence of anaerobic conditions in hydromorphic soils, associated with the presence of organic matter favors the development of anaerobic microorganisms that produce phytotoxic substances, especially short chain organic acids. Selection of promising rice genotypes for use under these conditions requires difficult field evaluations, which may...
Article
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Molecular and morphological data analyses matrices are very informative tools for the estimation of genetic distances. We used AFLP markers, morphological traits and combined analysis to estimate the genetic distances between wheat genotypes and ascertain any associations between the two techneques. Nineteen wheat (Triticum aestivum L.) genotypes w...
Article
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We present here the annotation of the complete genome of rice Oryza sativa L. ssp. japonica cultivar Nipponbare. All functional annotations for proteins and non-protein-coding RNA (npRNA) candidates were manually curated. Functions were identified or inferred in 19,969 (70%) of the proteins, and 131 possible npRNAs (including 58 antisense transcrip...
Article
Full-text available
A brusone é a principal doença da cultura do arroz irrigado e pode comprometer até 100% da produção de grãos de algumas lavouras isoladas nos casos de ataques epidêmicos. A melhor forma para o controle desta doença é o emprego da resistência genética, por ser mais econômica. O trabalho teve por objetivo avaliar a herdabilidade, número de genes e aç...
Article
Full-text available
Rice blast poses the greatest disease threat to irrigated rice, causing losses up to 100% in grain yield under epidemic attack. Genetic resistance is the most effective and environmentally sound way to control the disease. Thus, the objective of this work was to evaluate the number of genes and gene action involved in the inheritance of resistance...
Article
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Rice is a model genome for cereal research, providing important information about genome structure and evolution. Retrotransposons are common components of grass genomes, showing activity at transcription, translation and integration levels. Their abundance and ability to transpose make them good potential markers. In this study, we used 2 multiloc...
Article
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TOLERANCE TO THE ALUMINUM IN OAT CULTIVARS UNDER HYDROPONIC CULTURE The use of hidroponic culture to evaluate tolerance to aluminum toxicity in oat genotypes can be performed by measuring root regrowth, allowing phenotypically to discriminate tolerant genetic constitutions sensitivity. Twelve white oat cultivars indicated for cultivation in Souther...
Article
Full-text available
Using isolates collected in three counties of Rio Grande do Sul State, Brazil, the goals of this work were to determine (i) the pattern of virulence or avirulence of the isolates to 25 Pc resistance genes, (ii) the similarity in virulence among Puccinia coronata f. sp. avenae isolates considering their pattern of virulence or avirulence, (iii) the...
Article
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Conhecer como os caracteres agronômicos se correlacionam nas populações segregantes é primordial ao melhorista de plantas, principalmente quando o objetivo for seleção indireta, por meio de um caráter de fácil mensuração ou de maior herdabilidade correlacionado ao caráter de interesse de menor herdabilidade. Dessa forma, a partir da variabilidade o...
Article
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As temperaturas baixas que ocorrem durante o cultivo do arroz na Região Sul do Brasil causam prejuízos ao rendimento e à qualidade dos grãos de arroz. Genótipos tolerantes a baixas temperaturas seriam uma alternativa para minimizar tais prejuízos. Desse modo, o presente trabalho teve como objetivo avaliar a tolerância ao frio em famílias mutantes d...
Article
Full-text available
Selection of the appropriate parents to be used in artificial crosses is one of the main decisions faced by plant breeders that will facilitate the exploitation of maximum genetic variability and production of superior recombinant genotypes. Several techniques have been used in aiding the identification of genotypes with promising and desirable agr...
Article
Full-text available
Maize could be an excellent option for crop rotation in flooded areas in southern Brazil. There are, however,few studies on the genetic basis of tolerance to flooding in maize. The objective of this study was to determine the inheritanceof this tolerance based on plant and root dry matter of young maize plants. Maize lines were crossed to form thre...
Article
Full-text available
Em trigo a distância genética vem sendo estimada por meio de caracteres fenotípicos, dados moleculares, coeficiente de parentesco e a combinação destes. Entretanto, não existem estudos comparando a distância estimada a partir de caracteres morfológicos e fenológicos acessados a campo, a partir de caracteres fenotípicos relacionados à produtividade...
Article
Full-text available
The use of hidroponic culture to evaluate tolerance to aluminum toxicity in oat genotypes can be performed by measuring root regrowth, allowing phenotypically to discriminate tolerant genetic constitutions sensitivity. Twelve white oat cultivars indicated for cultivation in Southern Brazil were evaluated aiming at to characterize their aluminum tol...
Article
Full-text available
The knowledge of how the agronomical traits are correlated in segregating populations is of primary importance for plant breeders, specially when one considers indirect selection through a character easily measurable or with high heritability correlated to the trait of interest with lower heritability. Agronomical traits in F2 and F3 generations of...
Article
Full-text available
Low temperatures that occur during the cultivation of rice in the Southern region of Brazil cause reductions in to the yield and quality of the rice grain. Genotypes tolerant to low temperatures would be an alternative to minimize these problems. In the present work cold tolerance was evaluated in rice families (M4 generation) in the vegetative and...
Article
Full-text available
This research was aimed at evaluating and identifing which type of sum of squares can be more appropriate to test hypotheses and also presenting appropriate alternatives to solution of problems through the analysis of mean square expected values used in the methodology of mixed linear models. The analysis of mean square expected values can be a too...
Article
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The objective of this work was to develop the use of backcrosses among elite parental lines and to identify the parents with higher probability of developing superior progenies when used in crossing blocks. The following traits were analyzed: number of panicles per plant and plant grain yield in kg. ha-1. Five oat genotypes (UPF 16, UPF 18, UFRGS 7...
Article
Full-text available
O objetivo deste trabalho foi estimar a utilização do método de retrocruzamento entre genitores elite para obtenção de maior probabilidade de desenvolver progênies superiores de aveia que propiciem elevado êxito na seleção. Foram coletados dados dos caracteres: número de panículas por planta e rendimento de grãos da planta individual em kg ha-1. Fo...
Article
The objectives of the present work were to adjust the method for identifying genetic variability in rice through the use of minimal solution in hydroponic culture, and to identify the most important level and character for the study. The experiment consisted of the response evaluation of 18 rice genotypes to three levels of aluminum treatment. Five...
Article
Full-text available
The aim of the study was to evaluate the efficiency of three methods of cluster analysis in representing the estimated genetic distance through morphological traits among 19 genotypes of wheat and to evaluate a selection index of parents based on the distance in relation to the ideotype. The experiment was carried out in 2003 and 2004, at the UFPEL...
Article
Full-text available
O conhecimento da distância genética entre genótipos é importante ferramenta utilizada na escolha de genitores que vão dar origem às populações segregantes. Essa informação serve como parâmetro para indicação de cruzamentos que possibilitem recuperar recombinantes superiores para o caráter desejado. O principal objetivo do estudo foi promover infor...
Article
Full-text available
The objective was to evaluate wheat near-isogenic lines differing from the trait stay-green and synchronized maturation regarding their alluminum tolerance and sensibility to the giberellic acid (GA3). The experiment was conducted in the Double-haploids and Hydroponics Laboratory of FAEM/UFPel, in random block with split plot design with three repl...
Article
Full-text available
A seleção indireta visando ao incremento no rendimento de grãos pelos seus componentes primários bem como a resistência ao acamamento podem representar estratégias eficientes a serem adotadas para otimização do ganho genético em trigo. Nesse sentido, o objetivo do trabalho foi evidenciar caracteres que possibilitem identificar genótipos de elevado...
Article
Full-text available
O objetivo deste trabalho foi avaliar linhas quase isogênicas de trigo com o caráter permanência verde e de maturação sincronizada quanto à tolerância ao alumínio e à sensibilidade ao ácido giberélico (AG3). O experimento foi conduzido no Laboratório de Duplo-haplóides e Hidroponia da FAEM/UFPel, em delineamento de blocos ao acaso, com parcelas sub...
Article
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Resumo – O objetivo deste trabalho foi avaliar o efeito da dissimilaridade genética, aferida por caracteres morfológicos e marcadores moleculares, sobre a heterose e heterobeltiose em híbridos de aveia. Foram utilizados cinco genitores cruzados na forma dialélica, tendo sido desconsiderados os híbridos recíprocos. Não houve relação linear entre as...
Article
Full-text available
Resumo – Os objetivos deste trabalho foram: determinar o padrão de resistência/suscetibilidade de 20 genótipos de aveia a 40 isolados de Puccinia coronata f. sp. avenae, coletados em três municípios do Rio Grande do Sul; o padrão de virulência/avirulência desses isolados contra os genótipos de aveia; e indicar genitores para a geração de populações...
Article
Full-text available
The objective of this work was to assess genetic dissimilarity effect, as determined by morphological traits and molecular markers, on heterosis and heterobeltiosis in oat hybrids. Five parent lines were crossed in a diallelic design, disregarding reciprocal hybrids. Nolinear relationship among means of genetic dissimilarity was established, possib...
Article
Full-text available
The objectives of this work were: to determine the resistance/susceptibility pattern of 20elite oat genotypes to 40isolates of Puccinia coronata f.sp. avenae; to determine the pattern of virulence/avirulence of isolates collected in three counties of Rio Grande do Sul to the oat genotypes studied; and to indicate potential parents for the generatio...
Article
Full-text available
In Brazil, oat is cultivated over a vast area. There are, however, no reports on the use of the different traits of importance measured simultaneously in different environments for cultivar classification. The objective of our study was to compare nonparametric selection indexes for cultivar classification in their average performance in six enviro...
Article
Full-text available
Oat crown rust is the most important disease for the oat crop, occurring in practically all the areas where oat is cultivated. The most indicated form of control for this disease is the use of resistant cultivars. However, for the durable resistance to be acquired, it is necessary to know the genetics of resistance to crown rust in oats. Thus, the...
Article
Panicle weight selection in oats is a potential tool for indirect selection for grain yield. However, the phenotype depends on the expression of several genes, hindering the selection based on traditional methods. The identification of markers associated to the trait has a lot to contribute for the development of Marker Assisted Selection programme...
Article
Full-text available
Soils with high aluminum (Al3+) concentrations can affect the development and nutrient absorption of rice plants. The goals of this study were to evaluate the absorption of P, Mg, Ca and K in 18 rice genotypes and their overall performance when subjected to Al3+ stress in hydroponic systems. The experimental design was randomized blocks with 3 repl...
Article
Full-text available
Solos com concentrações elevadas de alumínio (Al3+), podem prejudicar o desenvolvimento e a absorção de nutrientes de plantas de arroz. O objetivo do experimento foi avaliar o desempenho de dezoito genótipos de arroz quanto a absorção de P, Mg, Ca e K e identificar genótipos com bom desempenho quando submetidos ao estresse por Al3+ em sistema hidro...
Article
Full-text available
A ferrugem da folha da aveia é a moléstia mais importante que ataca a cultura da aveia, ocorrendo em praticamente todas as áreas em que a aveia é cultivada. A forma mais indicada para o seu controle é a utilização de cultivares resistentes. Contudo, para que seja alcançada a resistência durável ao patógeno, é necessário que se conheça a genética da...
Article
Full-text available
Indirect selection through traits of higher heritability and of case measurements can result in larger genetic progress compared to using direct selection. This work was performed with the following objectives: (1) to estimative the phenotypic correlations between individual plant grain yield and agronomic traits of importance in the selection of w...
Article
Full-text available
Várias técnicas vêm sendo propostas para elevar a probabilidade de obtenção de populações segregantes promissoras, concentrando grande esforços dos pesquisadores. Assim, o objetivo deste trabalho foi verificar a eficiência da utilização da média dos genitores, da heterose e heterobeltiose do F1 e da distância genética morfológica e molecular na pre...
Article
Full-text available
O conhecimento da distância genética entre genótipos é importante ferramenta utilizada na escolha de genitores que vão dar origem às populações segregantes. Essa informação serve como parâmetro para indicação de cruzamentos que possibilitem recuperar recombinantes superiores para o caráter desejado. O principal objetivo do estudo foi promover infor...
Article
Full-text available
Estudos de diversidade e estrutura genética de populações de patógenos por meio de genes de resistência conhecidos são importantes, por permitirem o acesso de forma direta aos genes de virulência/avirulência dos indivíduos das diferentes populações-alvo. Dessa forma, o objetivo deste trabalho foi caracterizar a diversidade e a estrutura genética de...
Article
Full-text available
In oat (Avena sativa L.) breeding programs, the advance of segregating generations demands physical, financial and humans resources. However, an effective process of selection by characters highly correlated can facilitate the success of plant breeders in obtaining genetic constitutions with high performance in early generations. Five oat genotypes...
Article
Full-text available
RESUMO O cultivo hidropônico permite avaliar a tolerância de genótipos de aveia à toxicidade ao alumínio por meio da medida da retomada do crescimento de raiz, separando fenotipicamente, os genótipos como tolerantes e sensíveis. Dez cultivares de aveia branca recomendadas para o cultivo no Sul do Brasil foram avaliados para quantificar a tolerância...
Article
Full-text available
Rice is a major worldwide-cultivated crop. Besides it's the economical and social importance, this species have biological features that make it a model for basic studies. In the last years at least three sequencing project were announced generating valuable information. Mutants may be a powerful tool to study gene action, function and regulation....
Article
Full-text available
A dissimilaridade genética estimada por meio de marcadores moleculares, quando acompanhada de informações fenotípicas, é importante para a seleção de genótipos para o melhoramento e o mapeamento genético. Desta forma, os objetivos deste estudo foram: i) estimar a dissimilaridade genética entre 30 linhagens de milho contrastantes para a tolerância a...
Article
Full-text available
A dissimilaridade genética estimada por meio de marcadores moleculares, quando acompanhada de informações fenotípicas, é importante para a seleção de genótipos para o melhoramento e o mapeamento genético. Desta forma, os objetivos deste estudo foram: i) estimar a dissimilaridade genética entre 30 linhagens de milho contrastantes para a tolerância a...
Article
Full-text available
In genetics and breeding studies it is common to conduct experiments of fixed (sowing method) and random (populations) factors. Therefore, the most appropriate statistic analyses would use mixed linear models. In this sense, objectives of this work were i) to estimate the variance components for the random factor effects and interaction population...
Article
Full-text available
Rice, one of the world's most important food plants, has important syntenic relationships with the other cereal species and is a model plant for the grasses. Here we present a map-based, finished quality sequence that covers 95% of the 389Mb genome, including virtually all of the euchromatin and two complete centromeres. A total of 37,544 nontransp...
Article
Full-text available
Several studies have searched for higher efficiency on plant selection in generations bearing high frequency of heterozygotes. This work aims to compare the response of direct selection for grain yield, indirect selection through average grain weight and combined selection for higher yield potential and average grain weight of oat plants (Avena sat...
Article
Demands for sustainable agricultural systems have forested the development of biological control techniques, such as the use of the egg parasitoid Trichogramma Westwood. However, the arduous identification of the parasitoid at the species level, due to the tiny size and the morphological similarities is an obstacle to increasing its use. Molecular...
Article
Full-text available
Estimates of associations among traits are not very precise when based on annual data since the year factor influence the phenotype strongly. Therefore, objective of this work was to estimate the repeatability coefficients and number of years needed for an accurate prediction of genetic, phenotypic and environmental correlations among six important...
Article
Full-text available
Objective of this work was to estimate genetic parameters among and within potato clonal families for tuber yield, average tuber weight, tuber appearance and chip color. Twenty families were evaluated in spring 2003 and fall 2004 on the experimental field of Embrapa Clima Temperado, Pelotas, state of Rio Grande do Sul, Brazil. A randomized complete...
Article
Full-text available
In genetics and breeding studies it is common to conduct experiments of fixed (sowing method) and random (populations) factors. Therefore, the most appropriate statistic analyses would use mixed linear models. In this sense, objectives of this work were i) to estimate the variance components for the random factor effects and interaction population...
Article
Full-text available
A correlação genotípica permite avaliar a magnitude e a direção da associação entre caracteres, sendo de grande utilidade por permitir a viabilidade do emprego da seleção indireta, que em alguns casos, pode levar a progressos genéticos mais rápidos e altamente expressivos em programas de melhoramento de aveia (Avena sativa L.). O objetivo deste tra...
Article
Full-text available
The use of genotypic correlation helps evaluating the magnitude and direction of associations between characters facilitating the application of indirect selection, leading to faster and larger genetic gains in oat (Avena sativa L.) breeding programs. This study aimed to test a modification of PETR & FREYS’ (1996) formula, to obtain genotypic, phen...
Article
Full-text available
Phenotype-based selection can be influenced by environmental factors. Plants breeders need to use selection methods to separate genetic from environmental effects. The goal of this study was to test the efficacy of indirect selection to increase oat (Avena sativa L.) grain yield under different sowing systems. Eight oat segregant populations were s...
Article
Full-text available
Twenty oat genotypes (Avena sativa L.) were evaluated for grain yield in the crop year of 2001 and 2002 in nine different locations in Paraná, Rio Grande do Sul and São Paulo states, Brazil. The objectives of this work were to obtain adaptability and stability parameters estimates in favorable and unfavorable environments with and without fungicide...
Article
Full-text available
The statistical multivariate analysis has a widespread use by researchers, creating a large demand for specific knowledge regarding its application concerning its assumptions and or limitations. In order to evaluate the degree of association among different characters of agronomic importance with an estimative reliable in biological terms, it is st...
Article
Full-text available
A seleção com base no fenótipo pode ser influenciada por fatores de ambiente, sendo necessário que o melhorista utilize métodos de seleção que separem efeitos genéticos dos de ambiente. O objetivo deste estudo foi testar a eficiência da seleção indireta para o incremento no rendimento de grãos de aveia (Avena sativa L). Oito populações segregantes...
Article
Full-text available
Vinte cultivares de aveia (Avena sativa L.) foram avaliados para rendimento de grãos nas safras agrícolas de 2001 e 2002 em nove locais dos estados do Paraná, Rio Grande do Sul e São Paulo, com o objetivo de avaliar as estimativas dos componentes de adaptabilidade e estabilidade do rendimento de grãos em ambientes favoráveis e desfavoráveis em pres...
Article
Full-text available
A análise estatística do tipo multivariada vem crescendo consideravelmente, motivando a sua ampla utilização por parte dos pesquisadores criando, assim, grande demanda por conhecimentos específicos tanto a respeito da sua aplicação quanto das suas pressuposições ou limitações. Para que a avaliação do grau de associação entre diferentes caracteres d...
Article
Knowledge on the inheritance of lodging-resistance is of great value for the development of new wheat varieties (Triticum aestivum L.). Crosses among four different bread wheat genotypes were evaluated in the field. The analysis was based on three fixed (P 1 , P 2 and F 1) and three segregant (F 2 , BC 1 F 1 and BC 2 F 1) generations. Means and var...
Article
Full-text available
This study aimed to estimate the general (GCA) and specific (SCA) combining abilities and to provide genetic information related to the yield components through diallelic crosses involving five oat parents, analyzed by the method 2, model B, described by GRIFFING (1956). The experiment was conducted in the Centro Agropecuário da Palma. The followin...
Article
Full-text available
Comparou-se a campo a variabilidade genética em populações de aveia hexaplóide tratadas com agentes mutagênicos físico e químico, através do caráter ciclo vegetativo de plantas. Foram realizados experimentos em duas safras agrícolas em Pelotas, RS, em 1997/98 e 1998/99. As sementes foram irradiadas no Centro Regional de Oncologia da Faculdade de Me...
Article
Full-text available
Comparou-se a campo a variabilidade genética em populações de aveia hexaplóide tratadas com agentes mutagênicos físico e químico, através do caráter ciclo vegetativo de plantas. Foram realizados experimentos em duas safras agrícolas em Pelotas, RS, em 1997/98 e 1998/99. As sementes foram irradiadas no Centro Regional de Oncologia da Faculdade de Me...
Article
Full-text available
Rice, one of the world's most important food plants, has important syntenic relationships with the other cereal species and is a model plant for the grasses. Here we present a map-based, finished quality sequence that covers 95% of the 389 Mb genome, including virtually all of the euchromatin and two complete centromeres. A total of 37,544 non-tran...
Article
Full-text available
A estimativa da divergência genética entre cultivares pode ser útil em um programa de melhoramento para o direcionamento de hibridações e o conhecimento do germoplasma disponível. O objetivo do trabalho foi estimar a dissimilaridade genética entre genótipos de aveia (Avena sativa), por meio de marcadores AFLP e do coeficiente de parentesco, e corre...
Article
Full-text available
In order to cultivate oats (Avena sativa L.) as an economically alternative in low lands, it is necessary to use cultivars tolerant to the main organic acids produced by organic matter decomposition resulting from no tillage systems. The objectives of this work were estimate genetic dissimilarity among m3 mutant families and the oat cultivar UFRGS...
Article
This study was carried out to evaluate levels of genetic variation among 36 maize lines, tolerant and susceptible to flooding, using SSR and RAPD molecular marker techniques. Fifteen SSR primers and 21 RAPD primers were employed to analyze polymorphisms among genotypes. For SSR data two analyses were performed, clustering and polymorphism informati...
Article
Full-text available
Knowledge on the inheritance of lodging-resistance is of great value for the development of new wheat varieties (Triticum aestivum L.). Crosses among four different bread wheat genotypes were evaluated in the field. The analysis was based on three fixed (P 1 , P 2 and F 1) and three segregant (F 2 , BC 1 F 1 and BC 2 F 1) generations. Means and var...
Article
Full-text available
Eight wheat genotypes with different plant statures being four “stay-green” and four non “stay-green” were evaluated in hydroponic culture supplemented with giberellic acid (GA3). The experiment was conducted in the Laboratório de Di-haplóides e Hidroponia from the Centro de Genômica e Fitomelhoramento – FAEM/UFPel and in the Centro Experimental da...
Article
Full-text available
Estimates of associations among traits are not very precise when based on annual data since the year factor influence the phenotype strongly. Therefore, objective of this work was to estimate the repeatability coefficients and number of years needed for an accurate prediction of genetic, phenotypic and environmental correlations among six important...
Article
Full-text available
Lodging-resistance is an important wheat trait; however there are few studies on genetic divergence of wheat genotypes concerning lodging-related traits. Therefore, the objectives of this study were to estimate the genetic dissimilarity of 14 wheat genotypes based on lodging-related traits, the relative contribution of the traits to the dissimilari...
Article
Full-text available
The goal of this work was to analyze the molecular structure and diversity of four Spodoptera frugiperda (J.E. Smith) populations associated to the corn and rice crops in Rio Grande do Sul State. Four populations of caterpillars were collected from distinct areas (more than 300 km apart), from the counties of Santa Rosa (corn) and Uruguaiana (irrig...