Fernando Luiz Finger

Inferências genéticas na produção e qualidade de tomateiro sob cruzamento dialélico

Genetic inferences on the performance of five tomato cultivars (Ângela I.5100, Floradade, IPA-05, Jumbo AG-592 and Santa Clara) and their p(p - 1)/2 hybrids for production characteristics and fruit quality were obtained through Haymans methodology (1954). The results showed a favorable situation for breeding to production characteristics, but not for content of soluble solids, total carotenoids, and content of betacarotene. The data evidenced low variability in the cultivars studied.

Variabilidade genética em batata-doce com base em marcadores isoenzimáticos

A variabilidade genetica de 55 clones de batata-doce, compreendendo cultivares comerciais e acessos obtidos de coletas, foi avaliada por meio de padroes isoenzimaticos, utilizando-se tecnicas de analise multivariada. Cultivou-se uma planta por vaso, com 2 litros de capacidade, preenchido com terra, esterco e areia lavada na proporcao de 3:2:1, com tres repeticoes. As coletas das folhas e raizes novas para analises iniciaram-se aos 45 dias apos o plantio. Foram utilizados, para folhas, os sistemas enzimaticos: GOT, aEST, bEST, PGI, PGM e IDH e, para as raizes: PRX, aEST, bEST, PGI, PGM e IDH. A combinacao dos diferentes padroes enzimaticos e tecidos analisados possibilitou a discriminacao individual de 32 dos 55 clones analisados. Os 23 clones restantes foram incluidos em sete grupos distintos, com base nos fenotipos isoenzimaticos exibidos. Os clones, dentro de cada um desses grupos, foram considerados materiais de mesmo genotipo, devido, tambem, as suas caracteristicas morfologicas semelhantes. A aEST de raizes foi o sistema que apresentou maior numero de bandas polimorficas, proporcionando a discriminacao individual de 32 clones. O metodo de agrupamento de Tocher reuniu os 39 clones em nove grupos e, a analise pelo metodo das medias das distâncias, revelou a formacao de onze grupos de similaridade. O clone 46 formou um grupo individual pelo metodo de Tocher e foi o mais divergente pelo metodo das medias das distâncias. Por apresentar boas caracteristicas comerciais e produtivas, seria um dos clones eleitos para se iniciar programas de cruzamentos.

Caracterização físico-química de frutos de quatro cultivares de quiabo

In an experiment some physical and chemical characteristics of four okra cultivars were evaluated. The experimental design was of randomized blocks, where the treatments were the cultivars Amarelinho, Red Velvet, Star of David and Mammoth Spinless with five replications. At commercial maturity fruits of the cultivar Star of David presented the largest diameter, total fresh matter, content of dry matter, smallest length, content of water and vitamin C in comparison to the other cultivars. The cultivar Red Velvet presented the smallest diameter, total fresh matter, content of dry matter, reducing sugars and content of chlorophyll a, b and total, but the largest content of water and vitamin C. The cultivar Amarelinho produced the longest fruits and the smallest content of chlorophyll a, b and total. The cultivars Amarelinho and Mammoth Spinless showed higher contents of total reducing sugars.

Production and Breeding of Chilli Peppers (Capsicum spp.)

The book contains aspects of production, genetics and breeding of Capsicum species with emphasis on fruit quality, yield and its nutritional characteristics among with some specific chapters focusing on breeding and physiological features of potted ornamental Chili and responses to abiotic stress and postharvest of fruits

Qualidade da cebola influenciada pelo estádio de maturação da planta na colheita

Bulbs of varieties Texas Grano and Baia Periforme were harvested from plants with 10 % natural top plant collapse, 10 % induced top collapse and 50 % natural top collapse in the experimental field of Federal University of Vicosa, in 2006 . The following parameters were evaluated at harvest: total fresh mass, diameter, color (L*, a* and b*), dry matter content, total soluble solids, relative water content from the pulp and skin of the bulb. Texas Grano had higher total fresh mass, diameter and total soluble solids for bulbs harvested at 10 and 50 % natural top collapse. Relative water content of the skin of Texas Grano was higher for bulbs harvested with 10 % natural top collapse, which had higher water content. Bulbs harvested at 10 % natural top collapse and 10 % induced top collapse had higher L* values compared with 50 % natural top collapse, showing less color intensity for the skin. Lower values of b* for Texas Grano skin in 10% natural top collapse results from less external yellowing. Plant maturity of Baia Periformedid not affect total fresh mass, diameter, dry matter content, total soluble solids and a* and b* values. Thus Baia Periforme has similar bulb size and quality regardless the maturity index used. Texas Grano shows larger bulbs and yellowish and drier skin when harvested with 50 % natural top collapse.

Longevity and quality of Heliconia psittacorum x H. spathocircinata 'Golden Torch' treated with 8-hydroxyquinoline citrate.

This study aimed to evaluate the effect of 8-hydroxyquinoline citrate (8-HQC) on the quality and longevity of heliconia ?Golden Torch? inflorescences stored at 23.9±1.8°C and 51±9% RH. The treatments consisted of 0, 100, 200 and 300 mg L-1 8-HQC, evaluated at 0, 2, 4, 6 and 8 days after harvest. The inflorescences were pulsed with 8-HQC for 18 h and subsequently transferred to flasks with distilled water. At every two days, floral appearance, fresh mass, flower opening, chroma and lightness were determined. The floral appearance was influenced by storage time and by the treatment with 8-HQC. However, the values of fresh weight, the flower opening, lightness and chroma were affected only by the number of days in storage. The fresh weight decreased by 1.6% from the first to eighth day after harvest. At the end of the storage time, the inflorescences exhibited two open flowers at the start of expansion. The lightness value increased by 3.4%, while the chroma decreased by almost 4.9% in bracts during storage, indicating the passage of dark orange color to light orange. The 8-HQC did not increase the vase life of inflorescences compared to control. Based on the scale of appearance, the inflorescences treated with 300 mg L-1 of 8-HQC had superior vase life compared with the other treatments, within eight days of evaluation.

COMPARISON AMONG HYBRIDS AND PRE-SELECTED CULTIVARS FOR RESISTANCE TO ETHYLENE IN ORNAMENTAL PEPPERS

There are many factors affecting the post-production phase that determine the quality and extend the shelf life in ornamental plants and flowers. In general, ethylene present during shipping and marketing is one of the most important factors affecting quality of many potted plants. The aim of this work was to compare two hybrids with two cultivars one resistant and another susceptible to ethylene. The plants of four genotypes were grown in greenhouse until 30% of the fruits were ripe. Then the vases were transferred to a room at 25°C with 8-10 µmol s-1 m-2 with white fluorescent light. Afterwards, the vases were transferred to a 60-L container and treated with 10 µl L-1 ethylene for 48 h. Afterwards, the plants were analyzed for number of leaves and fruits abscised at 0 and 144 h after ethylene treatment. The hybrid 76Ax97BP showed the lowest leaf abscission compared to the resistant cultivar. The hybrid DRAx97BP showed no difference and was similar to the resistant cultivar. For the fruit abscission, there was no significant difference among the hybrids and cultivars. These hybrids will be used in the ornamental breeding program of Capsicum at the Federal University of ParaAxadba and Federal University of ViA§osa.

TEOR DE AMIDO EM ESPIGAS DE MILHO-VERDE MANTIDAS EM DIFERENTES CONDIÇÕES DE ARMAZENAMENTO DIFERENTES CONDIÇÕES DE ARMAZENAMENTO

The large-scale production of Baculovirus to control fall armyworm, Spodoptera frugiperda, presents many limitations. The most important limiting factor is that the baculovirus, which infects fall armyworm, causes liquefaction of the integument immediately after death. This disruption of the integument difficultates the large scale production because dead insect must be frozen before being harvested. This fact implies in high lab work need, increasing the cost of the biopesticide. This problem was overcome by the discovery of a new baculovirus nucleopolyhedrovirus (NPV) isolate in Cascavel/PR, that doesn’t cause liquefaction of the integument (isolate 6NR) immediately after the insect death. This is an extremely important factor in a large-scale baculovirus production. In addition, mortality caused by isolate 6NR on 6-day-old-larvae was above 93% (SEM=0.7%), the average weight dead larva was 116.21 mg (SEM=22.9), the larval equivalent and weight equivalent/ha were 15.04 g (SEM=1.2) and 140.32 larvae (SEM=20.1), respectively.

Longevidade de inflorescências de Epidendrum ibaguense tratadas com aminoetoxivinilglicina

Abstract – This work evaluated the influenceof the aminoethoxyvinylglycine (AVG), an inhibitor of ethylene synthesis, when applied in pulsing solution or sprayed, on the abscission and longevity of cut star orchid ( Epidendrum ibaguense Kunth) inflorescences.The cut stems were placed in solutions with 0, 0.5, 1, 1.5 and 2 mM AVG concentrations immediately after the harvest for periods of 6, 12, 18 and 24 hours. The same treatment concentrations were sprayed on the inflorescencesuntil runoff. The experiment had a randomized complete block design with factorial treatments of rate and duration plus rate of application to the flowers, with fivereplicates, with three stems per experimental unit. Regardless of the way the AVG was applied, the inhibitor extended the flowers’ longevity in approximately 70% compared to the control treatment, reaching maximum effect at 1.5 and 2 mM AVG. The percentage of abscissed flowersdiminished in all treatments containing AVG, with higher efficiencywhen sprayed over the inflorescence,decreasing the abscission by 80% at concentrations between 1 and 2 mM AVG.Index terms: AVG, pulsing, spraying.