The aim of this work was to carry out the chemical characterization and sensory analysis of strawberry fruits from cultivars Camp-dover, Dover, Camp-oso, Oso Grande, and Tudla-Milsei, grown in the southern region of Minas Gerais State. Soluble solids, titratable acidity, and the ratio between both characteristics were evaluated, in three replications. Sensory analysis was carried out by a panel of 34 non-trained assessors, recruited out of UNICENTRO students, professors, and employees. Assessors evaluated the samples for aroma and flavor using sorting-preference tests, with scores from 1 (less preferred) to 5 (most preferred). Appearance was assessed by means of a hedonic scale, from 1 (dislike very much) to 9 (like very much). Each assessor evaluated five samples of each cultivar for aroma and flavor. To evaluate external appearance, fruits were presented in polystyrene trays, covered with transparent film. Cultivars Camp-dover, Oso Grande, and Tudla-Milsei had the highest (p<0.05) contents of soluble solids (respectively 8.1, 7.8, and 7.6ºBrix); while for titratable acidity, the highest values were found in fruits of cultivars Tudla-Milsei, Oso Grande, and Dover (0.88, 0.80, and 0.60). For the soluble solids:titratable acidity ratio, cultivar Camp-dover (13.5) significantly exceeded all others. Fruits from cultivars Camp-dover and Oso Grande, for their good scores in aroma (3.70 and 2.80, respectively), flavor (3.82 and 3.52), and appearance (7.00 and 7.38) had the best acceptability. Considering the results all together, cultivars Camp-dover and Oso Grande stood out as promising options for strawberry growing, since their advantageous fruit characteristics are likely to favor commercialization.

Resumo -O objetivo deste trabalho foi selecionar clones de batata-doce (Ipomoea batatas) resistentes à raça 1 de Meloidogyne incognita e avaliar a eficiência do método de seleção empregado, pela estimação dos coeficientes de variação genética e ambiental e das herdabilidades no sentido amplo. Foram utilizados 123 genótipos de batata-doce, entre os quais quatro cultivares comerciais − Brazlândia Rosada, Brazlândia Roxa, Brazlândia Branca e Palmas −, e 119 acessos previamente selecionados no programa de melhoramento vegetal da Universidade Federal de Lavras. O delineamento experimental utilizado foi o de blocos aumentados, com três tratamentos comuns: as cultivares de batata-doce Brazlândia Branca e Palmas, e a cultivar de tomate Santa Clara, suscetível ao nematoide. A classificação dos níveis de resistência foi realizada de acordo com o fator de reprodução do nematoide e o índice de reprodução relativo à cultivar Santa Clara, de tomateiro. A relação entre os coeficientes de variação genética e ambiental e as herdabilidades no sentido amplo foram altas, tanto para o fator de reprodução quanto para o índice de reprodução dos nematoides, o que demonstra a eficiência do método empregado para a seleção de genótipos resistentes. Foram identificados 57 genótipos promissores de batata-doce, resistentes à raça 1 de M. incognita, e selecionados para continuar no programa de melhoramento.Termos para indexação: Ipomoea batatas, fator de reprodução, galhas, índice de reprodução, nematoide, resistência. Selection of sweetpotato clones resistant to Meloidogyne incognita race 1Abstract -The objective of this work was to select sweetpotato (Ipomoea batatas) resistant clones to Meloidogyne incognita race 1, and to assess the efficiency of the selection method deployed, through the estimation of genetic and environmental coefficients of variation, and broad-sense heritabilities. Genotypes assessed comprised 123 sweetpotato entries altogether, including four commercial cultivars − Brazlândia Rosada, Brazlândia Roxa, Brazlândia Branca, Palmas − and 119 clones previously selected by the Universidade Federal de Lavras sweetpotato breeding program. The experimental setup was a an augmented block design, using three common treatments: the sweetpotato cultivars Brazlândia branca and Palmas, and the nematode-susceptible tomato cultivar Santa Clara. Nematode resistance levels were defined both by the nematode reproduction factor and by the nematode reproduction index relative to tomato cv. Santa Clara. The ratio between genetic and environmental coefficients of variation and the broad-sense heritability estimates were high, for both nematodes reproduction factor and reproduction index, indicating that the selection method deployed was efficient for the selection of resistant genotypes. Fifty-seven sweetpotato clones were identified as resistant to M. incognita race 1, and selected to continue in the sweetpotato breeding program.

RESUMO O trabalho teve como objetivo avaliar a produtividade, características físico-químicas e perdas pós-colheita de cultivares de cebola produzidas em sistemas de cultivo convencional e orgânico. Foram avaliadas a produção total e a massa média dos bulbos, o teor de sólidos solúveis, a acidez titulável, a massa seca e o pH. Além destas características, foram avaliadas perdas pós-colheita, com observação da perda de massa. Os bulbos foram armazenados em câmara fria à temperatura de 3ºC ± 1ºC e umidade relativa de 75% ± 5% durante 90 dias. O sistema orgânico foi superior ao convencional em produtividade, não diferindo significativamente nas demais características. A produtividade do híbrido Baia F 1 foi mais expressiva, nos dois sistemas de cultivo, assim como as maiores massas médias de bulbos. Dentre as cultivares, a Red Creole proporcionou elevados valores de sólidos solúveis e massa seca de bulbos, nos dois sistemas de cultivo. Essas características indicam que a cultivar Red Creole possui bom desempenho para industrialização. Nas avaliações pós-colheita, na cultivar Red Creole observou-se a maior redução na massa de bulbos, tanto no sistema orgânico quanto no convencional. Estes dados revelam que não existe influência do sistema de cultivo na conservação pós-colheita dos bulbos.Palavras-chave: Allium cepa L., rendimento, ácido pirúvico, pungência. ABSTRACT YIELD AND POSTHARVEST QUALITY OF ONION CULTIVARS IN THE ORGANIC AND CONVENTIONAL CROPPING SYSTEMSThe study aimed to evaluate yield, physical-chemical features and post-harvest losses of onion cultivars grown in organic and conventional cropping systems. Total yield and average weight of bulbs, content of soluble solids, titratable acidity, dry weight and pH. Were evaluated Besides these characteristics, post-harvest losses were also evaluated, with observation of mass loss. The bulbs were stored in cold chamber at a temperature of 3 ° C ± 1 º C and relative humidity of 75% ± 5% for 90 days. The organic system had higher yield than the conventional system, but did not differ significantly in other evaluated characteristics. The hybrid Baia F 1 showed the greatest yield and the highest average masses of bulbs in both cropping systems. The Red Creole cultivar showed higher values of soluble solids content and bulbs dry mass than other cultivars in the two cropping systems. These characteristics indicate that Red Creole cultivar is an excellent material for industrialization. Post-harvest evaluations showed that Red Creole cultivar had the highest reduction in the weight of bulbs in conventional and organic systems. This data show that there is no influence of the cropping systems in the bulbs post-harvest conservation.

Resistência de genótipos de couve-manteiga ao pulgão-verde e sua relação com a cerosidade foliar 1Resistance of kale genotypes to the green peach aphid and its relation to leaf wax ABSTRACT -The aim of this work was to evaluate the level of resistance of kale genotypes to the green peach aphid Myzus persicae, and its relationship to the wax present in the leaves. The test was carried out on twelve kale genotypes belonging to the germplasm bank of HortiAgro Seeds S. A. Epicuticular wax was extracted and quantified in the laboratory. Observations were also made using a scanning electron microscope, and a grading scale was used to assess the wax visually. Resistance to the aphid by antibiosis was tested, and the following parameters evaluated: nymphal period, pre-reproductive, reproductive and post-reproductive periods, total number of nymphs, average number of nymphs per day and longevity. The genotypes, UFLA-3, UFLA-4 and UFLA-6, presented the greatest wax content, with UFLA-6 displaying a higher level of resistance to the aphid. However, no relationship was found between wax content and resistance to the aphid in the group of kale genotypes studied.

Several attempts have been made in order to produce garlic out of season in Southern Brazil, aiming to reduce dependence on imports. The use of cold storage before planting is a possible alternative. Another possibility could be forward planting dates using early cultivars, more tolerant to diseases and less demanding in temperature and photoperiod conditions. The objective of the present study was to evaluate the effects of three vernalization periods (30, 40 and 50 days) and three planting dates (23/03, 23/04 and 23/05) on the yield of two garlic cultivars (Caçador and Quitéria). A randomized block design with three replications was used. The assessed traits were plant emergence, plant height, secondary plant growth, total yield and classification of marketable bulbs. The plant emergence and plant height increased in the first cultivation period. The yield of marketable bulbs of the Quitéria cultivar increased on the first two planting dates and the Caçador cultivar showed the highest yield of marketable bulbs on the second planting date. The third planting date provided a decrease in the secondary growth of the Caçador cultivar plants. The 30-day vernalization period promoted lower secondary growth of Quitéria cultivar plants. The 40-day vernalization period, which allowed better adaptation of both cultivars to photoperiod and temperature, resulted in good vegetative and productive development in the region of Guarapuava, Paraná State, Brazil.