Embrapa Hortalicas SPM

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Embrapa Hortalicas SPM

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The market demand for uniformity and productivity of commercial carrot roots has prioritized hybrid materials instead of open pollinated varieties. In this sense, the objective of this study was to estimate the ability of combining carrot progenitors for the characters root yield and tolerance to leaf blight. The experiments were carried out at Gama-DF, during the 2012-13 and 2013-14 season. Thirty-three carrot hybrids, originated from crosses among three male-sterile populations and 11 male-fertile S2 lines from tropical origin were assessed. At 90 days after sowing, the incidence of leaf blight disease was evaluated in the plots. At 100 days after sowing, the plants were harvested and root yield characters were evaluated. The analysis of variance was performed and the effects of general combining ability (GCA) and specific combining ability (SCA) were estimated. It was verified that both additive and non-additive genes are important to express characters of root yield and leaf blight tolerance. The male-sterile progenitors with higher general combining ability for root yield are the LM-649 and LM-650 lines, and among the male-fertile, the LM-555-2 line is the highest. The best hybrids for root yield and tolerance to leaf blight are LM-649 × LM-555-11-1, LM-650 × LM-555-7-1 and LM-650 × LM-554-8-1.


da Silva G.O.,Embrapa Hortalicas SPM | Suinaga F.A.,Embrapa Hortalicas | Ponijaleki R.,Embrapa Produtos e Mercado | Amaro G.B.,Embrapa Hortalicas
Revista Ceres | Year: 2015

In Brazil, the average yield of sweet potato is consistently below the potential of the crop due to the cultivation of local varieties and unimproved genotypes. Increase in yield is achieved by the adoption of appropriate cultural practices and use of more productive cultivars. Thus, the aim of this study was to evaluate the performance of root yield traits in sweet potato cultivars. Six sweet potato cultivars were evaluated: Princesa, BRS Amelia, BRS Cuia, Brazlândia Roxa, Beauregard and BRS Rubissol in an experiment conducted in Canoinhas-SC. These cultivars were planted in the field, in the agricultural years 2012 and 2013, in a randomized block design with three replications and plots consisting of 11 plants. At 150 days after planting, the plants were harvested and the root yield components were evaluated. In general, the cultivars assessed in this study are good choices for sweet potato growers, with yields greater than the country's average. Cultivars Beauregard and BRS Rubissol showed the best results for the traits related to root yield. Cultivars Princesa, BRS Amelia and BRS Cuia showed intermediate performance for commercial roots, especially in the second year of the assessment. The cultivar Brazlândia Roxa had the worst performance for yield root characters at 150 days after planting, which was probably due to its longer cycle.


Silva G.O.,Embrapa Hortalicas SPM | Pereira A.S.,Embrapa Clima Temperado | Suinaga F.A.,Embrapa Hortalicas | Carvalho A.D.F.,Embrapa Hortalicas
Horticultura Brasileira | Year: 2014

The aim of this work was to verify the performance of seven advanced potato clones in relation to yield components, compared to varieties grown in large scale in Brazil. The experiment was carried out in the experimental feld of Embrapa Produtos e Mercado, Canoinhas, Santa Catarina state, Brazil. Seven advanced potato clones developed in Embrapa Potato Breeding Program, and two commercial cultivars (Agata and Asterix) were evaluated in the spring season of 2012. A randomized complete block design with four replications of 10 plants per plot was used. Plants of each plot were harvested 110 days after planting, and evaluated for yield components. The data were submitted to analysis of variance, grouping means by the Scott & Knott test and phenotypic correlation. Except F22-08-01, all clones exceeded the control cultivars for yield trait components, mainly the clones F74-08-09 and F17-08-01. The total tuber yield was mainly determined by the average tuber mass and little infuenced by the total number of tubers per plant, while marketable tuber mass was similarly determined by the marketable tuber number and average tuber weight.


Nascimento W.M.,Embrapa Hortalicas | Andrade K.P.,Embrapa Hortalicas | Freitas R.A.,Embrapa Transferencia de Tecnologia | Silva G.O.,Embrapa Hortalicas SPM | Boiteux L.S.,Embrapa Hortalicas
Horticultura Brasileira | Year: 2016

Exploitation of the existing genetic variability in tomato germplasm via breeding strategies is one alternative to improve the germination under adverse environmental conditions and to provide seeds with better quality and performance. The rate and percentage of germination of tomato seeds are influenced by several genetic and environmental factors. Temperature is one of the major factors capable of influencing tomato seed germination parameters. In the present work, the female and male inbred lines of four fresh-market tomato hybrids (San Vito, Duradoro, Finestra, and Fontana) as well as the reciprocal (maternal line x paternal line and paternal line x maternal line) F1 crosses were evaluated for seed quality traits and germination ability at different temperatures. The seed traits were evaluated using five tests: mass of 1000 seeds; germination at 15°C, 25°C, and 35°C; first count at 15°C, 25°C and 35°C, accelerated aging, and seedling emergence. Higher temperatures (35°C) decreased the germination in all evaluated accessions. Significant effects of the inbred lines on performance of the hybrids were observed for germination at different temperatures as indicated by the analysis of the reciprocal crosses. Maternal (female) effects were observed for some traits in the hybrids San Vito and Fontana. Male effects were observed for the hybrid Finestra. Heterotic effects were observed for some traits in the hybrids San Vito and Finestra. © 2016, Sociedade de Olericultura do Brasil. All rights reserved.


da Silva G.O.,Embrapa Hortalicas SPM | Pereira A.S.,Embrapa Clima Temperado | Suinaga F.A.,Embrapa Hortalicas | Ponijaleki R.,Embrapa Produtos e Mercado
Horticultura Brasileira | Year: 2013

The objective of this study was to identify the best time of desiccation of plants to promote skin quality without detriment of potato cultivar BRS Clara. The experiment was carried out at Embrapa Produtos e Mercado, Canoinhas, Santa Catarina state, Brazil. 'Agata' was used as the control cultivar. The treatments were four desiccation times (90, 95, 100, and 105 days after planting), in spring season. The experimental design was randomized blocks with four replications. Each plot consisted of four rows of ten plants each. Ten days after desiccation of plants, the two internal rows of each plot were harvested and the tubers evaluated for yield component, skin roughness, and tone coloration of tuber skin. The data were submitted to analysis of variance and regression. For BRS Clara, a desiccation of the plants should be done earlier to avoid losses in quality of the skin, especially in relation to the roughness of the tubers. The maximum date for desiccation was 100 days after planting of tubers to obtain tubers with skin quality and no further reduction in yield of tubers. For the control cultivar Agata, that presented better tuber appearance than BRS Clara, but lower yield, delaying the desiccation date up to 100 days of planting also seems appropriate, but not due to loss of quality of the skin, but by having reached the maximum yield.


Silva G.O.,Embrapa Hortalicas SPM | Pereira A.S.,Embrapa Clima Temperado | Suinaga F.A.,Embrapa Hortalicas | Ponijaleki R.,Embrapa Produtos e Mercado
Horticultura Brasileira | Year: 2014

The aim of this research was to study the possibility of decreasing the amount of nitrogen recommended based on the soil analysis for the potato cultivar BRS Ana, considering yield component variables. The experiment was carried out in Haplustox soil, in the experimental field of Embrapa Produtos e Mercado, Canoinhas, Santa Catarina state, Brazil, in the spring season. The treatments consisted of six nitrogen doses applied at planting time (0, 60, 80, 100, 120 and 140 kg ha-1), as ammonium sulphate. The recommended dose of N based on soil analysis was 120 kg ha-1. A randomized complete block design with four replications was used. The tuber yield of each plot was evaluated for yield component variables. Plants of BRS Ana did not respond considerably in yield to nitrogen levels higher than 100 kg ha-1, suggesting that the dose recommended by the soil analysis, 120 kg ha-1, can be reduced in 17%, without loss of yield of tubers. A larger decrease in the amount of nitrogen, however, would cause a reduction in the commercial tuber yield.


da Silva G.O.,Embrapa Hortalicas SPM | da Silva Pereira A.,Embrapa Clima Temperado | de Nazareno N.R.X.,Instituto Agronomico do Parana | Ponijaleki R.,Embrapa SPM
Revista Ceres | Year: 2015

The objective of this study was to evaluate the performance of elite potato clones for agricultural and processing quality traits. The experiments were carried out in Pelotas, State of Rio Grande do Sul, Canoinhas, State of Santa Cantarina, and Londrina, State of Paraná. A set of elite clones of the Embrapa Potato Breeding Program was evaluated. The experimental design was a randomized complete block, with three replications to Pelotas and Londrina, and four to Canoinhas. This experiment evaluated total mass of tubers, commercial mass of tubers, number of commercial tuber, mass percentage of commercial tuber, average mass of commercial tuber, specific gravity, frying color and vegetative cycle. Analysis of variance for each site and mean grouping test of each trait were performed from the data obtained in the experiment. By examining the results from the perspective of identifying the most suitable clones for fresh market, where high yield potential and early maturity are essential, compared to the control cultivar Ágata, the clones that appeared as the most promising were F80-03-06 and CL02-05. For processing, for which the specific weight, frying color, tuber yield are important traits clone F81-01-06 stood out, despite not having the highest yields, it has large tubers, intermediate vegetative cycle and good suitability for frying, in comparison to the control cultivar Asterix.


da Silva G.O.,Embrapa Hortalicas SPM | Ney V.G.,Embrapa Clima Temperado | Pereira A.S.,Embrapa Clima Temperado | Terres L.R.,Embrapa Clima Temperado
Revista Ceres | Year: 2014

The objective of this study was to evaluate the relationships among tuber traits in potato progenies in the seedling generation and in the first clonal generation. The experiments were carried out at Embrapa Clima Temperado, in Pelotas, RS. Twelve potato progenies were grown as seedling generation in a greenhouse in the crop year 2010/2011 and the first field generation was grown in the crop year 2011/2012. The two trials were arranged in a randomized complete block design with tree replications of 25 seedlings per family. After harvest, tubers of each plant were evaluated for 14 phenotypic traits. Individual and joint analyses of variance were performed for the generations As well as correlation analysis between generations and path analysis for each generation. The correlations between tuber appearance and skin roughness; tuber curvature and pointing; weight and number of tubers; and eyebrow prominence and eye depth are strongly and positively correlated in the first two generations of selection. The correlation between the first two generations for eye depth, eyebrow prominence, tuber weight, tuber number, tuber curvature and tuber pointing indicates that selection for these traits can be applied in the seedling generation. Roughness and tuber curvature are the characteristics that most influence the overall appearance, thus the selection of these characters can be used to improve the tuber overall appearance.


Granja N.P.,Instituto Agronomico Of Campinas | Hirano E.,Embrapa Produtos e Mercado | da Silva G.O.,Embrapa Hortalicas SPM
Horticultura Brasileira | Year: 2013

This is to explain and exemplify for the public a method to calculate the Disease Severity Factor to determine limits of tolerance for black scurf, common scab, silver scab, powdery scab and brown eye on the samples of seed potatoes for phytosanitary analysis to meet the Normative Instruction number 32/2012 by Ministry of Agriculture, Livestock and Food Supply, about seed potatoes certification and production.


da Silva G.O.,Embrapa Hortalicas SPM | Stoker G.,Embrapa Produtos e Mercado SPM | Ponijaleki R.,Embrapa Produtos e Mercado SPM | Pereira A.S.,Embrapa Clima Temperado
Horticultura Brasileira | Year: 2013

The performance of the potato cultivars BRS Ana, BRS Clara, and Agata was verified, grown under naturally-induced water stress, in relation to tuber yield. The experiment was carried out in the 2011/2012 season, in the Anta Gorda locality, Canoinhas, Santa Catarina state, Brazil. The experimental design was randomized complete blocks with eight replications, and plots with three rows of 10 plants in each row. One hundred twelve days after planting, the plants of each plot were harvested and evaluated for tuber yield traits. The data were analyzed by variance analysis and grouping of means. The potato cultivar BRS Ana had higher yield of tubers than 'BRS Clara' and 'Agata', but was favored by the rains. 'BRS Clara' and 'Agata', which were most affected by the drought, produced the same number and mass of marketable tubers, though 'BRS Clara' produced tubers with a higher average mass, suggesting a higher tolerance to drought.

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