Abstract In plant breeding, the dialelic models univariate have aided the selection of parents for hybridization. Multivariate analyses allow combining and associating the multiple pieces of information of the genetic relationships between traits. Therefore, multivariate analyses might refine the discrimination and selection of the parents with greater potential to meet the goals of a plant breeding program. Here, we propose a method of multivariate analysis used for stablishing mega-traits (MTs) in diallel trials. The proposed model is applied in the evaluation of a multi-environment complete diallel trial with 90 F1’s of simple maize hybrids. From a set of 14 traits, we demonstrated how establishing and interpreting MTs with agronomic implication. The diallel analyzes based on mega-traits present an important evolution in statistical procedures since the selection is based on several traits. We believe that the proposed method fills an important gap of plant breeding. In our example, three MTs were established. The first, formed by plant stature-related traits, the second by tassel size-related traits, and the third by grain yield-related traits. Individual and joint diallel analysis using the established MTs allowed identifying the best hybrid combinations for achieving F1’s with lower plant stature, tassel size, and higher grain yield.

A cultura do melão se caracteriza como importante atividade na agricultura familiar; ressalta-se que a produção orgânica de frutas e hortaliças tem apresentado, no Brasil e no mundo, grande crescimento em área. Este trabalho teve, como objetivo, estudar a qualidade pós-colheita de melão cultivado em sistema orgânico. Os tratamentos orgânicos foram constituídos por adubação de base com vermicomposto bovino (dose recomendada, ½ da dose e dobro da dose) mais utilização de biofertilizante na forma pulverizada ou pulverizada e regada, além de um tratamento adicional com adubação química. A qualidade pós-colheita foi avaliada através de atributos físico-químicos e fitoquímicos. O manejo orgânico com a metade da dose de húmus recomendada mais o biofertilizante pulverizado e o manejo de adubação química produziram frutos com maiores teores de açúcares, carotenoides totais, ácido ascórbico e ácido fólico obtendo-se frutos mais equilibrados e de melhor qualidade fitoquímica. A capacidade antioxidante foi definida, sobretudo pela presença dos compostos fenólicos influenciados pelo tipo e pela dose das adubações, com superioridade nos tratamentos orgânicos com o dobro da dose de húmus.

Melon farming is characterized as an important family agriculture activity and the organic production of fruits and vegetables has shown a large growth in terms of areas in Brazil and around the world. This work aimed to study the postharvest quality of melon cultivated in an organic system. The organic treatments constituted of base fertilizer with cattle manure vermicompost (recommended dose, ½ dose and double dose) plus the use of biofertilizer (sprayed or sprayed + irrigated), and an additional treatment with chemical fertilization. The postharvest quality was evaluated through physico-chemical and phytochemical attributes. The organic management with half the recommended dose of vermicompost plus the sprayed biofertilizer and the chemical fertilization management produced fruits with higher levels of sugar, total carotenoids, ascorbic acid and folates, obtaining more balanced fruits, with a better phytochemical quality. The antioxidant capacity was defined mainly by the presence of the phenolic compounds, which were influenced by the type and the dose of the evaluated fertilizers, with superiority in the organic treatments with double the dose of cattle manure vermicompost.

apesar de muitos avanços no campo da educação especial, ainda há muito poucos trabalhos relativos ao tema das Altas Habilidades/Superdotação (AH/SD), particularmente no interior do Brasil. Neste artigo são apresentados resultados de uma pesquisa objetivando investigar a conjectura de que há bastante desconhecimento sobre este assunto nas licenciaturas da Universidade Federal de Pelotas (UFPel). Como estudo de caso, foram levantados dados com cerca de um terço dos estudantes dos cursos de Licenciatura em Matemática. Utilizou-se como instrumento de pesquisa um questionário que permitia avaliações quantitativas e qualitativas dos conhecimentos e concepções dos alunos acerca das AH/SD. Os resultados indicaram que a maioria deles não estudou o assunto e este não é abordado curricularmente no curso. Com isso, eles desconhecem a legislação pertinente e nem mesmo sabem que os termos "superdotação" e "altas habilidades" têm o mesmo significado. Como fruto da desinformação, as respostas deles continham diferentes concepções mitológicas segundo a literatura de referência. Apenas para exemplificar, a maioria vê os alunos com AH/SD como um grupo homogêneo e não imagina um superdotado apresentando baixo rendimento escolar.

Despite many advances in the field of special education, there are relatively few studies on the subject of high abilities/giftedness (HA/G), particularly in the interior of Brazil. This paper presents results of a study that aimed to investigate the supposition that there is a basic lack of understanding about HA/G in the Pelotas Federal University (UFPel) teacher preparation courses. In this case study, data was collected from almost a third of the undergraduate students in mathematics courses. The survey instrument was a questionnaire designed to carry out a quantitative and qualitative analysis of their knowledge and conceptions about HA/G. The results pointed out that the majority of the students had not studied this topic and it is not addressed in their courses. For this reason, they are unaware of the relevant legislation on this theme, much less that the terms "giftedness" and "high abilities" mean the same thing. Due to their lack of information, their answers revealed various mythological conceptions, as juxtaposed to the literature. To mention one example, most of them had the assumption that gifted students form a homogeneous group whose members never fail in school.