Estimation of genetic parameters and selection of high-yielding, upright common bean lines with slow seed-coat darkening.

Slow seed coat darkening is desirable in common bean cultivars and genetic parameters are important to define breeding strategies. The aims of this study were to estimate genetic parameters for plant architecture, grain yield, grain size, and seed-coat darkening in common bean; identify any genetic association among these traits; and select lines that associate desirable phenotypes for these traits. Three experiments were set up in the winter 2012 growing season, in Santo Antônio de Goiás and Brasília, Brazil, including 220 lines obtained from four segregating populations and five parents. A triple lattice 15 x 15 experimental design was used. The traits evaluated were plant architecture, grain yield, grain size, and seed-coat darkening. Analyses of variance were carried out and genetic parameters such as heritability, gain expected from selection, and correlations, were estimated. For selection of superior lines, a ?weight-free and parameter-free? index was used. The estimates of genetic variance, heritability, and gain expected from selection were high, indicating good possibility for success in selection of the four traits. The genotype x environment interaction was proportionally more important for yield than for the other traits. There was no strong genetic correlation observed among the four traits, which indicates the possibility of selection of superior lines with many traits. Considering simultaneous selection, it was not possible to join high genetic gains for the four traits. Forty-four lines that combined high yield, more upright plant architecture, slow darkening grains, and commercial grade size were selected

Induction of seed coat darkening in common beans (Phaseolus vulgaris L.) and the association with cooking time after storage.

Carioca is the most important edible dry bean (Phaseolus vulgaris L.) grown in Brazil. It represents the largest dry bean market class in the world. The seed coat of carioca beans will darken under adverse harvest conditions and with the increasing of storage time. In general, darkened seeds are associated with older seeds that suffer from prolonged cooking times. A relatively new 'slow darkening' trait is available in carioca that delays seed coat darkening under storage. However, its effect on cooking time is unknown. The objective of this work was to evaluate two induction methods of seed coat darkening and to examine the effect of slow darkening trait on cooking time after storage. Lines derived from four segregating populations resulting from crossings between cultivar BRSMG Madrepérola with slow seed coat darkening, and the parents BRS Estilo, BRS Cometa, BRS Notável and BRS Sublime with normal darkening were evaluated. An experiment inlcuding 220 lines, 55 per population and the five parents, in a 15x15 triple lattice was conducted in the winter growing season in Brasilia. Seed coat darkening and cooking time traits were evaluated. Two methods for inducing seed coat darkening were compared: an accelerated aging test using UV light for 72 hours, and an extended storage for 90 days under ambient conditions. The correlation between the induction methods ranged from 0.77 to 0.85 for the different populations indicating either method could be used to discriminate lines with normal versus slow darkening trait. The percentage of light-colored grain lines was identified by both induction methods of seed coat darkening ranged from 75 to 85.7% in the populations. The genetic correlation between seed coat darkening and cooking time varied from -0.06 to -0.48, indicating that in some populations there is no significant genetic correlation between seed coat darkening and cooking time. Thus, light colored grains are not indicative of low cooking time, when they are considered genotypes with genetic variation for the seed coat darkening

Association of slow darkening gene 'SD' with grain quality traits in carioca bean and new candidate marker.

The seed darkens during storage becoming less acceptable to consumers and depreciation of the economic value. Cultivars with delayed grain darkening associated with reduced cooking time after storage will be advantageous for the farmer and seed dealers. Grain storage for longer periods allows flexibility, i.e., the producer can await better prices on the market

Identificação de linhagens elite de feijoeiro-comum de grãos tipo carioca com altos teores de ferro e zinco.

Esse trabalho teve por objetivo selecionar entre linhagens elite de feijão carioca, aquelas com maiores teores de ferro e zinco nos grãos, para realização de novos cruzamentos visando o aumento dos teores desses minerais e a associação de caracteres desejáveis, bem como estimar parâmetros genéticos para esses caracteres.Pôster - pós-graduação

Perfil da classificação da farinha de mandioca do território da cidadania do Vale do Juruá, Acre.

O Território da cidadania do Vale do Juruá (TCVJ) abrange uma área de 29.686,20 Km² e é composto por 5 municípios: Cruzeiro do Sul, Mâncio Lima, Marechal Thaumaturgo, Porto Walter e Rodrigues Alves (MDA, 2011). A mandioca (Manihot esculenta, Crantz) desempenha importante papel econômico e social para o Estado do Acre, pois se constitui num dos produtos básicos da dieta alimentar da população (MOURA e CUNHA, 1998). Conforme dados do IBGE (2011), no ano de 2009 o Estado do Acre possuía cerca de 29,9 mil ha ocupados com esta cultura, se constituindo no terceiro estado de maior produção da região Norte do Brasil, com cerca de 561 mil toneladas. De acordo com este Instituto, o TCVJ representou neste ano aproximadamente 47% de toda a produção de mandioca do Estado. O TCVJ é extremamente conhecido no Estado do Acre por sua produção de farinha de mandioca. A SEFAZ (Secretaria da Fazenda do Estado do Acre) cita que, em 2009, 262.308 toneladas de farinha de mandioca foram comercializadas em Cruzeiro do Sul, oriunda deste município e regiões, onde aproximadamente 95% desta produção foram vendidas para outros estados como Amazonas e Rondônia, envolvendo milhares de famílias no estado com esta atividade.Categoria Processamento e agroindústria: resumo 164

Seleção de genótipos elite de feijão preto para teores de ferro e zinco nos grãos e estimação de parâmetros genéticos.

A obtenção de cultivares com maior valor nutritivo tem obtido destaque nos programas de melhoramento genético, além de maximizar esse valor é preciso selecionar as melhores, visando tanto o valor nutricional, como a aceitação de mercado. Diante disso, este trabalho foi realizado com o objetivo de avaliar a variabilidade de genótipos elite de feijão preto e estimar parâmetros genéticos para os teores de ferro e zinco em grãos. Avaliaram-se 30 genótipos, que foram semeados no inverno de 2011, em Santo Antônio de Goiás

Seleção de genótipos elite de feijão preto para teores de ferro e zinco nos grãos e estimação de parâmetros genéticos.

Este trabalho foi realizado com o objetivo de avaliar a variabilidade de genótipos elite de feijão preto e estimar parâmetros genéticos para os teores de ferro e zinco nos grãos.Pôster - graduação

Influence of postharvest water replacement on shelf life of parsley leaves.

Wilting is one of the major problems of parsley leaves in Brazilian retail stores. This study was conducted to determine the effect of postharvest replacement of water by submerging the parsley leaf bunches in water for 3, 6 or 9 hours at three stages: when total weight loss reached 5 and 10% and immediately after two hours of storage. Leaves were stored at 5 or 25ºC until visible wilting or yellowing was detected. Results demonstrated that water replacement resulted in gains in fresh mass, resulting in longer shelf life for leaves stored at 5 and 25ºC. In general, longer recharging resulted in greater water uptake by the leaves, but at a lower rate. By recharging the leaves with water, lower rates of mass loss were observed compared to untreated leaf bunches. Regardless the storage temperature, the relative water content of leaves decreased during shelf life, which in general was less accentuated for leaves submerged in water for 6 and 9 hours. Postharvest water replacement should be considered as an option to extend the shelf life of horticultural products that are susceptible to intense moisture loss