Rodrigo Oliveira DeLima

Rodrigo Oliveira DeLima
Universidade Federal de Viçosa (UFV) | UFV · Department of Crop Science

PhD
Professor, researcher and corn breeder at Universidade Federal de Viçosa Email: rodrigoodelima@ufv

About

37
Publications
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313
Citations
Introduction
I am an associate professor and corn breeder at Unviversidade Federal de Viçosa (www.ufv.br).

Publications

Publications (37)
Article
The identification of genomic regions associated with root traits and the genomic prediction of untested genotypes can increase the rate of genetic gain in maize breeding programs targeting roots traits. Here, we combined two maize association panels with different genetic backgrounds to identify SNPs significantly associated with root traits and t...
Article
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Background The characterization of genetic diversity and population differentiation for maize inbred lines from breeding programs is of great value in assisting breeders in maintaining and potentially increasing the rate of genetic gain. In our study, we characterized a set of 187 tropical maize inbred lines from the public breeding program of the...
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Spatial trends represent an obstacle to genetic evaluation in maize breeding. Spatial analyses can correct spatial trends, which allow for an increase in selective accuracy. The objective of this study was to compare the spatial (SPA) and non-spatial (NSPA) models in diallel multi-environment trial analyses in maize breeding. The trials consisted o...
Article
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Even though nitrogen (N) is the nutrient required in the largest amount for maize production and is one of the major limiting factors of maize production, we were not aware of any information about the N-use efficiency of maize hybrids currently cropped in Brazil. For this, we assessed the genotypic variation of a set of 114 maize hybrids currently...
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Heterotic grouping based on the analyses of heterosis or combining ability and molecular diversity has not been consistent. The objectives of this study were to investigate the factors affecting heterotic grouping and the significance of the phenotypic and molecular data. We simulated grain yield and molecular data for nine populations, the nine se...
Article
Brazil has two growing seasons for maize (Zea mays L.) production: summer and winter. The additional maize produced in the winter and the high-yielding opportunities in the summer season make it important to understand responses of maize hybrids to row spacing and plant population across the two annual Brazilian growing seasons. In the 2015/2016 su...
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A strategy to increase nitrogen (N) use efficiency in maize is the genetic improvement of N acquisition through root morphology. Here, we quantified the genetic variation of 150 tropical maize inbred lines for root morphology and shoot traits and investigated the relationships among traits. We evaluated the inbred lines at the seedling stage in a g...
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Modern maize hybrid breeding is also focused on increasing nitrogen use efficiency (NUE) for grain production. The objectives of this study were to assess popcorn inbred lines for NUE, assess its genetic diversity for NUE and related traits, and investigate the relationship between vegetative and adult traits with NUE, under contrasting N levels. N...
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Identifying maize inbred lines that are more efficient in nitrogen (N) use is an important strategy and a necessity in the context of environmental and economic impacts attributed to the excessive N fertilization. N-uptake efficiency (NUpE) and N-utilization efficiency (NUtE) are components of N-use efficiency (NUE). Despite the most maize breeding...
Data
Data set necessary to replicate the findings of our research. (TXT)
Article
Full-text available
Understanding the genetic control of the nitrogen (N) and phosphorus (P) uptake, utilization, and translocation is essential to develop superior popcorn genotypes with high N and P use efficiency. The main objective of this study was to determine the genetic control for N and P uptake, utilization, and translocation efficiency indexes and shoot and...
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We combined linkage (LA) and linkage disequilibrium (LDA) analyses (emerging the term ‘LALDA’) for genomic selection (GS) purposes. The models were fitted to a simulated dataset and to a real data of feed conversion ratio in pigs. Firstly, the significant QTLs (quantitative trait locus) were identified through LA-based mixed models considering the...
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Improvement in nitrogen-use efficiency (NUE) on maize is among the best strategies to mitigate the problems of poor soil fertility in tropical conditions. The objectives of this study were: i) to quantify the genetic variability for NUE-components and agronomic traits in a set of tropical maize inbred lines; ii) to study the genetic divergence amon...
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The aim of this study was to evaluate the adaptability and stability of 29 commercial maize hybrids in the southeast of the State of Minas Gerais, Brazil, employing three methods. The 29 commercial maize hybrids from the 2014/2015 crop were evaluated for grain yield in five locations in the southeast of Minas Gerais. A randomised-block design was u...
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Studies on tropical popcorn (Zea mays L. ssp. mays) gene pools are still scarce. The objective of this study was to infer tropical popcorn gene pools by employing molecular and phenotypic information. Forty-eight inbred lines and 140 individuals belonging to the Viçosa and Beija-Flor popcorn populations were genotyped using 90 simple sequence repea...
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The vegetative use efficiency of nutrients by popcorn genotypes is poorly characterized. Thus, the objectives of the present study were to (i) evaluate the vegetative use efficiency of nitrogen (N) and phosphorus (P) and secondary traits in commercial popcorn hybrids, and (ii) investigate the relative importance of root traits for the vegetative us...
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n plant breeding programs that aim to obtain cultivars with nitrogen (N) use efficiency, the focus is on methods of selection and experimental procedures that present low cost, fast response, high repeatability, and can be applied to a large number of cultivars. Thus, the objectives of this study were to classify maize cultivars regarding their use...
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The aim of this study was to investigate the employment of components of the nitrogen efficiency use (NUE), and of the activities of the nitrate reductase and glutamine synthetase enzymes in the selection of nitrogen use efficient maize genotypes of maize. Ten maize genotypes at V4 stage were evaluated under high and low N. The experiment consisted...
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The objective of the present study was to present the theory and application of best linear unbiased prediction (BLUP) in reciprocal recurrent selection (RRS). Seven progeny tests from two RRS programmes with popcorn (Zea mays L. ssp. mays [syn. Zea mays L. ssp. everta (Sturtev.) Zhuk.]) populations were conducted and analysed for expansion volume...
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Popcorn inbred lines with more efficient nitrogen use are better able to uptake nitrogen from the soil and convert it into higher grain yield, resulting in lower environmental and economic impacts caused by nitrogen fertilization. The objectives of this study were to (i) identify inbred lines superior in nitrogen use (ii) assess the genetic diversi...
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Reciprocal recurrent selection (RRS) has been successfully applied to maize breeding for more than 60 years. Our objective was to assess the relative efficiency of the genotypic value and the effects of general and specific combining abilities (GCA and SCA) on selection. The GCA effect reflects the number of favorable genes in the parent. The SCA e...
Chapter
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Among environmental factors, drought is the principal factor that limits global agricultural production. Many global agricultural regions are already suffering serious problems with water shortage and this scenario suggests that greater efforts are required in the development of alternatives for sustainable agriculture, such as the selection of cul...
Chapter
Nitrogen (N) is a constituent of several organic compounds in plants. Consequently, this element is the most essential to plants. The identification of genotypes able to use nitrogen more efficiently is a slow process due the complexity of the metabolism of nitrogen, the influence of several environmental factors‚ and the great variation in the spe...
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The objective of this study was to assess the impact of pedigree, historical data, dominance, and data unbalance on the estimation and precision of genetic variances and breeding values and on the selection efficiency in annual crop breeding. Expansion volume and grain yield from 12 trials of inbred progeny and four tests of non-inbred families wer...
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The objective of this study was to evaluate four maize testers for identification of superior inbreed lines in testcross. The four testers evaluated are cultivars with narrow or wide genetic base (single-cross hybrids and open pollinated varieties) and two kernel types (flint or dent). SynD and SynF testers are open pollinated varieties with dent a...
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The modified recurrent selection method suggests a less productive population to test the other population more productive and itself aiming to have more genetic gains than tradition recurrent selection method that uses one population to test the other one. The objectives of this work were to estimate the genetic components, to predict and to evalu...
Article
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The modified recurrent selection method suggests a less productive population to test the other population more productive and itself aiming to have more genetic gains than tradition recurrent selection method that uses one population to test the other one. The objectives of this work were to estimate the genetic components, to predict and to evalu...
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The objectives were to identify maize germplasm for the organic productions system and to compare the genetic effects of the grain yield of maize cultivars in organic and conventional production systems. Diallel crosses were made between six maize cultivars and the hybrid combinations were evaluated in conventional and organic production systems. T...
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Phosphorus (P) deficiency has been reported to reduce nitrogen uptake (N) in maize, but the effect of this combination for parent selection still needs further studies. The objective of this work was to evaluate the interrelationship between P and N in the combining ability and parent selection in maize. Twent-eight hybrid combinations (CH), obtain...
Article
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The objective was to assess the genetic potential of maize population UFV 7 for breeding in Minas Gerais, Brazil. Three experiments were installed with the maize population UFV 7 in the three regions of Minas Gerais, in the harvest of 2006/2007. There was genotype x environment interaction for all characters. It was observed genetic variability for...
Article
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O objetivo deste trabalho foi identificar os efeitos genéticos que controlam a herança de caracteres associados à eficiência de utilização do fósforo (EUP) em milho e determinar as relações entre esses caracteres. Foi realizado um dialelo entre seis cultivares de milho do qual foram obtidas 15 combinações híbridas. Estas cultivares foram avaliadas...
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The objective of this work was to determine the genetic effects that control the inheritance of characters associated with the phosphorus utilization efficiency (PUE) in maize, and to determine the relationship among them. Adiallel between six maize cultivars was performed and 15 hybrid combinations were obtained from it. These cultivars were evalu...
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The aim of this study was to compare the multivariate methods GGE (Genotype main effects and Genotype xEnvironment interaction) and AMMI (Additive Main effects and Multiplicative Interaction) with the method of Eberhart andRussell for interpreting genotype x environment interaction. The AMMI and GGE analysis explained around 50% of the sumof square...
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The objective of this study was to evaluate the use of SREG GGE biplot methodology and factor analysis to stratify the genotype×environment interaction in maize. Forty-nine early maize hybrids were evaluated in nine environments. The experimental design used was a 7×7 square lattice with two replicates. Each plot consisted of two 5 m long rows spac...

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