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Repeatability estimates and minimum number of evaluations for selection of elep...
Rodrigues, Erina Vitório; Daher, Rogério Figueiredo; Gravina, Geraldo de Amaral; Viana, Alexandre Pio; Araújo, Maria do Socorro Bezerra deIn forage-plants breeding, the selection of superior genotypes has been undertaken through successive harvests in previously established intervals. However, this process involves many steps, the evaluation of many traits, and a great spending with costs and labor. Thus the estimate of the repeatability is essential in improvement of perennials, it allows predicting genotypic value of the individual, the minimum...
Controle genético da resistência da soja à raça 4 de Cercospora sojina
Gravina, Geraldo de Amaral; Martins Filho, Sebastião; Sediyama, Carlos SigueyukiO objetivo deste trabalho foi estudar o controle genético da resistência à Cercospora sojina, em populações segregantes derivadas do cruzamento entre as cultivares de soja Paraná e Bossier. Foram avaliadas nos genitores e nas gerações F1, F2, RC1 e RC2 seis características das plantas associadas com a doença: nota para infecção (NT); número de lesões por folíolo (NLF); diâmetro médio de lesão (DML); porcentagem...
Multivariate analysis of combining ability for soybean resistance to Cercospora...
Gravina, Geraldo de Amaral; Sediyama, Carlos Sigueyuki; Martins Filho, Sebastião; Moreira, Maurílio Alves; Barros, Everaldo Gonçalves deSeven soybean cultivars (Bossier, Cristalina, Davis, Kent, Lincoln, Paraná and Uberaba), with different levels of resistance to Cercospora sojina, race 04, were crossed according to a diallel design, with no reciprocals, to determine the general and the specific combining abilities for the resistance. The evaluations of the reaction to the disease were performed 20 days after the inoculation of the fungus on th...
Parâmetros genéticos da resistência da soja a Cercospora sojina
Gravina, Geraldo de Amaral; Martins Filho, Sebastião; Sediyama, Carlos Sigueyuki; Cruz, Cosme DamiãoA herança da resistência da soja a Cercospora sojina Hara foi avaliada por meio de parâmetros genéticos, estimados pela análise de médias e de variâncias de um índice multivariado. Foram utilizados os cruzamentos de duas cultivares resistentes, Paraná (P) e Uberaba (U), com uma suscetível, Bossier (B). Foram avaliados cinco caracteres associados à doença, nos genitores e nas gerações F1, F2, RCR e RCS de cada c...
Indexes in the comparison of pre-commercial genotypes of common bean
Marinho, Caillet Dornelles; Gravina, Geraldo de Amaral; Sebastião, Lanusse Cordeiro de Araújo; Almeida, Ney Costa deSpringer Nature Switzerland AG.O objetivo deste trabalho foi analisar a utilização do índice de seleção de cultivares (GARCIA, 1998) na indicação de genótipos superiores de feijão-vagem para a região Noroeste do Estado do Rio de Janeiro, em comparação a outros índices não paramétricos comumente utilizados no melhoramento vegetal. Os índices de ELSTON (1963), MULAMBA & MOCK (1978), SCHWARZBACH (1972) e GARCIA (1998) foram empregados na avalia...
The Eberhart and Russel’s bayesian method used as an instrument to select maize...
Nascimento, Moysés; Oliveira, Tâmara Rebecca Albuquerque de; Carvalho, Hélio Wilson Lemos de; Costa, Emiliano Fernandes NassauAdaptability and stability analysis methods that use a priori information allow identifying and selecting potentially productive genotypes with greater accuracy. The aim of the current study is to use the Eberhart and Russel’ Bayesian method as an instrument to analyze the adaptability and stability of hybrid maize cultivars and to assess the efficiency of using the distribution of informative and non-informati...
Alternative substrates in different containers for production of conilon coffee...
Jaeggi, Mário Euclides Pechara da Costa; Saluci, Julio Cesar Gradice; Rodrigues, Rogério Rangel; Gravina, Geraldo de Amaral; Lima, Wallace Luis deDifferent substrates and containers influence the production of coffee seedlings, which can reduce production costs, both with alternative substrates and with containers of smaller volumes of substrates. The aim the present study was to evaluate the viability of alternative substrates in different containers for production of Conilon coffee (Coffea canephora Pierre ex Froehner) seedlings in the nursery of the F...
Cultivation of immature Capsicum spp. embryos for incompatible-crossing embryo ...
Walter, Rafael; Carvalho, Virginia Silva; Generoso, Andressa Leal; Rodrigues, Rosana; Gravina, Geraldo de AmaralThe in vitro culture of embryos is an important technique to enable the rescue of embryos from incompatible crosses. Studies analyzing the factors that affect the in vitro culture of zygotic embryos are scarce. This study evaluated the effect of the genotype (Capsicum baccatum and C. frutescens), the composition of the culture medium (MS and ½ MS medium with different concentrations of sucrose, IAA and GA3) a...
Energy situation in the State of Rio de Janeiro and Elephant Grass as a Renewab...
Novo, Antonio Alonso Cecon; Daher, Rogério Figueiredo; Costa, Ernany Santos; Gravina, Geraldo de Amaral; Ogliari, JuaresThis paper presents a review of the energy situation in the State of Rio de Janeiro as well as other growing alternative sources of energy such as the elephant grass. The study includes a brief account of the sources for power generation that have played an important role in the energy sector. Among the main sources for energy purposes, the elephant grass has long been used in research at the Universidade...
Evaluation of the morphological and agronomic characteristics of bean pods in B...
Almeida, Sebastião Ney Costa; Thiebaut, José Tarcício Lima; Gravina, Geraldo de Amaral; Araújo, Lanusse Cordeiro; Daher, Rogério FigueiredoThe objective of this study was to identify the morphological and agronomic characteristics of F9 pod generations – as part of the string bean breeding program at UENF – in the town of Bom Jesus do Itabapoana, RJ, 2010, aiming to deliver the improved material for producers in the North and Northwestern part of Rio de Janeiro State. The evaluation of the pods characters has been done according to the List of Min...