Progresso com seleção nos compostos flintisa e dentado de milho (Zea mays L.)

Pós-graduação em Agronomia - FEIS

Resposta do arroz a doses e épocas de aplicação do regulador de crescimento etil-trinexapac

Pós-graduação em Agronomia - FEIS

Microclima e características agronômicas em diferentes espaçamentos e populações na cultura do milho

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Regulador de crescimento Etil-Trinexapac em diferentes densidades de semeadura na cultura do arroz de terras altas

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Coberturas vegetais, manejo do solo, doses de nitrogênio e seus efeitos na nutrição mineral e nos atributos agronômicos do milho

Research has investigated the best nitrogen rate for maize under the most diverse types of soil management. The aim of this study was to evaluate the influence of cover crops, soil management and topdressed N rates on the dry matter production, nutritional status, plant lodging, plant height and first-ear insertion of maize. Field experiments were carried out in Selvíria, Mato Grosso do Sul State, Brazil, in the growing seasons of 2009/2010 and 2010/2011, on a clayey Rhodic Haplustox (20º 20' S and 51º 24' W, at 340 m asl). Thirty-six treatments were established with four replications, in a randomized blocks design, to test combinations of cover crops (millet, Crotalaria juncea and millet + Crotalaria juncea), soil management (tillage with chisel plow + lightweight disking, heavy disking + lightweight disking, and no-tillage system) and N rates (0, 60, 90 e 120 kg ha-1 - urea as source). The maize hybrid DKB 350 YG® was used and topdressing N applied at stage V5 (fifth expanded leaf). Previously grown sunn hemp and millet + sunn hemp resulted in a higher shoot dry matter, P leaf content and total N, P and K uptake. In the no-tillage system, the initial and final population and shoot dry were highest, and first-ear insertion and plant height lower. The application of 120 kg ha-1 topdressed N increased the P leaf content, N and P in the entire plant, shoot dry matter, total N, P and K uptake, plant height, and the first-ear insertion of maize.

Multivariate approach in the selection of superior soybean progeny which carry the RR gene

Efficiency in the use of genetic variability, whether existing or created, increases when properly explored and analysed. Incorporation of biotechnology into breeding programs has been the general practice. The challenge for the researcher is the constant development of new and improved cultivars. The aim of this experiment was to select progenies with superior characteristics, whether or not carriers of the RR gene, derived from bi-parental crosses in the soybean, with the help of multivariate techniques. The experiment was carried out in a family-type experimental design, including controls, during the agricultural year 2010/2011 and 2011/2012 in Jaboticabal in the Brazilian State of São Paulo. From the F3 generation, phenotypically superior plants were selected, which were evaluated for the following traits: number of days to flowering; number of days to maturity; height of first pod insertion; plant height at maturity; lodging; agronomic value; number of branches; number of pods per plant; 100-seed weight; number of seeds per plant; grain yield per plant. Given the results, it appears possible to select superior progeny by principal component analysis. Cluster analysis using the K-means method links progeny according to the most important characteristics in each group and identifies, by the Ward method and by means of a dendrogram, the structure of similarity and divergence between selected progeny. Both methods are effective in aiding progeny selection.

Produtividade de arroz de terras altas em função de reguladores de crescimento

The use of sprinkler-irrigation and/or high levels of fertilization in upland rice can increase plant height and hence plant lodging. Lodging can be controlled by using growth regulators, in order to reduce plant height. The objective of this study was to evaluate the efficiency of plant growth regulators applied at the stage of panicle primordium differentiation on the reduction of plant height and the impact on grain yield and its components of upland rice cultivar Primavera, under sprinkler irrigation. The experiment was arranged in a 3x4 factorial randomized blocks design with four replications. Treatments consisted of: mepiquat chloride and trinexapac-ethil applied at doses 9, 50, 100, and 200 mg a.i. ha-1, and paclobutrazol at doses of 0, 25, 50, and 100 mg a.i. ha-1. Plant growth regulators reduced rice plant height; increasing doses of regulators reduced upland rice grain yield and its components; trinexapac-ethyl was the most harmful to rice grain yield.In this study, it was not identified the dose of growth regulator that allied reduction in plant height and did not cause decrease in rice yield.

Caracterização agronômica e morfológica de populações de milho

Pós-graduação em Agronomia (Genética e Melhoramento de Plantas) - FCAV

Índice de seleção para caracteres agronômicos em populações segregantes de soja

Pós-graduação em Agronomia (Genética e Melhoramento de Plantas) - FCAV

Predição de ganho genético utilizando índices de seleção em linhagens de milho

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Gesso aplicado na superfície do solo no desenvolvimento do arroz de terras altas sob plantio direto

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação dos custos da assistência de recém nascidos de mães diabéticas no Hospital das Clínicas -UNESP – Botucatu

The present work had as objective to calculate and to analyze the costs of the assistance of just born of diabetic mothers interned in the units of Joint Lodging of the Maternity and Nursery and UTI Neonatology of the HC - FMB - Unesp. This is a exploratory, descriptive study with quantitative analysis of the data, with just born of carrying mothers of gestational diabetes and of light hyperglycemia, that had carried through the prenatal assistance in the HC - FMB - Unesp, in the period of 1o of January the 31 of December of 2009. The analysis of the data disclosed that the costs indirect and of the assistance to the just born in joint lodging had been of: R$ 160,20 for the group of RN of mothers with light hyperglycemia, R$204,10 for the group with diabetes and R$100,57 for the control. The costs indirect and of the assistance to the just born in Nursery had been of: R$ 494,94 for the group of RN of mothers with light hyperglycemia, R$565,89 for the group with diabetes and R$262,98 for the control. The weighed average cost of the assistance to the just born in Joint Lodging, Nursery and UTI of Neonatology was of: R$ 191,33 for the group of RN of mothers with light hyperglycemia, R$458,58 for the group with diabetes and R$210,48 for the control. It can be concluded that the costs of just born of diabetic mothers and with light hyperglycemia were higher and had similar perinatal results to the one of the control group

Estratégias de seleção de genótipos de soja por meio de modelos mistos e abordagens multivariadas

Pós-graduação em Agronomia (Genética e Melhoramento de Plantas) - FCAV

Diversidade genética em linhagens avançadas de soja oriundas de cruzamentos biparentais, quádruplos e óctuplos

The aim of this study was to analyse the genetic diversity and agronomic performance of a group of advanced and superior strains of soybean, derived from biparental, four-way and eight-way crosses, in order to identify future promising and superior combinations. The experiment was carried out in the experimental area of the Paulista State University, Julio de Mesquita Filho, Jaboticabal Campus, in the state of Sao Paulo, Brazil. The characteristics under evaluation were: number of days to flowering, plant height at flowering, number of days to maturity, plant height at maturity, height of the first pod, number of branches, number of pods per plant, agronomic value, lodging, one hundred seed weight and seed yield., The Mahalanobis distance and the relative contribution of each characteristic were used to calculate the phenotypic distances. Among the genotypes analysed, 19 strains displayed high productivity, being superior to the controls (V-max, CD 216, CD 219 and Conquista). The greatest distance found was between strains JAB 41 and JAB 17 (279.81), followed by JAB 40 and JAB 17 (261.38) and between JAB 40 and JAB 22 (255.46). There were six groups formed using the Ward method, indicating the presence of genetic variability among the tested strains. Increasing the number of parents had no effect on the increase in genetic diversity between the strains, and was not the factor responsible for the grouping or not of the genotypes under test.

Agronomic efficiency and grain quality of upland rice cultivars as a function of nitrogen topdressing

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)