Embrapa Transferencia de Tecnologia

Goiânia, Brazil

Embrapa Transferencia de Tecnologia

Goiânia, Brazil
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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.

Silva R.R.,State University Londrina | Benin G.,Federal Technological University of Paraná | da Silva G.O.,Embrapa Transferencia de Tecnologia | Marchioro V.S.,Cooperativa Central de Pesquisa Agricola da Nossa Terra | And 2 more authors.
Pesquisa Agropecuaria Brasileira | Year: 2011

The objective of this work was to identify the best sowing dates and to evaluate the adaptability and stability of wheat cultivars in two wheat growing regions of the state of Paraná, Brazil. Seven cultivars were evaluated at Guarapuava and nine at Palotina as to grain yield, at four sowing seasons, in 2006, 2007 and 2008. The experimental design was a randomized complete block design, with four and three replicates, for Guarapuava and Palotina, respectively. The methodologies REML/BLUP and genotype main effect and genotype x environment interaction (GGE biplot) were used for adaptability and stability analysis, and the AMMI model was used to identify the best sowing dates. Sowing in July, at Guarapuava, and in April, at Palotina, maximized grain yield. The cultivars Safira, at Guarapuava, and CD 113, at Palotina, are stable, highly adapted and show high grain yield.

Tavares L.C.V.,Caixa Postal 231 | Bassoi M.C.,Caixa Postal 231 | Miranda L.C.,Embrapa Transferencia de Tecnologia | Prete C.E.C.,State University Londrina
Revista Brasileira de Sementes | Year: 2011

The objective of this study was to describe and analyze the technology transfer process of wheat cultivars developed by Embrapa Soybean and Embrapa Technology Transfer, in partnership with private seed producers of the Meridional Foundation. Systemic methodology, characterized by the stages of planning, establishment and management of demonstration units, establishment and monitoring of field days and evaluation and reporting of the results, was used. The work of the wheat breeding program of Embrapa Soybean with seed producers resulted in an increase in the participation of Embrapa cultivars in Paraná state's seed production. These results demonstrated the importance of associating technology transfer with wheat improvement in order to promote and speed up scientific and technological information to technical assistance, farmers and other Embrapa customers.

Marangon M.A.,Embrapa Transferencia de Tecnologia | Biasi L.A.,Federal University of Paraná
Pesquisa Agropecuaria Brasileira | Year: 2013

The objective of this work was to evaluate the effects of the application of concentrations of indolebutyric acid (IBA) and of bottom heat on rooting of stem cuttings of the blueberry cultivars Bluebelle, Bluegem, and Powderblue in the four seasons of the year. A completely randomized design was used, with a 4x5x2 factorial arrangement (seasons x concentrations of IBA x with and without heat), with 4 replicates and 20 stem cuttings as an experimental unit. The percentage of rooted cuttings, dead, alive and with callus, and the number and average length of the roots were evaluated. The highest rooting percentages were 57.1% for 'Bluegem' in summer, 30% for 'Bluebelle' in spring, with heating, and 63% for 'Powderblue' in summer with heating. IBA at the concentration of 2,000 mg L-1 increased the rooting of cuttings of the cultivars Bluegem and 'Powderblue'. Bottom heat increases the rooting of the cuttings harvested during autumn and winter in all cultivars, and also the cuttings harvested during summer and spring in the Bluebelle cultivar.

Junqueira K.P.,Embrapa Transferencia de Tecnologia | Faleiro F.G.,Embrapa Cerrados | Bellon G.,Embrapa Cerrados | Junqueira N.T.V.,Embrapa Cerrados | And 3 more authors.
Revista Brasileira de Fruticultura | Year: 2010

The most cultivated pitaya species nowadays is Hylocereus undatus, red pitaya with white pulp. Colombia and Mexico are the major world producers and, due to its rusticity, pitaya is considered a potentially viable alternative to make good use of gravel, sandy and compact rocky soils. Although the great demand, there is not yet a variety released on the market that attends production climatic needs and Brazilian consumer exigencies. The present work is a part of Embrapa Cerrados pitaya CPAC PY-01 selection and improvement program. It has had the objective to realize genetic variability study of 16 pitaya accesses maintained at Embrapa Cerrados germoplasm collection, showing different phenotypic characteristics with special relation to production, through molecular markers RAPD (Random Amplified Polymorphic DNA). The genomic DNA of each access was extracted and eleven decamer primers indicators were used to obtain molecular markers RAPD that were converted in a binarium data matrix, from where it was estimated genetic distances between accesses and realized grouping analysis and graphic dispersion. One hundred and eleven RAPD markers were obtained, making a 10, 1 markers medium per primer, in which 45 (40, 54%) were polymorphic. Genetic distances between 16 accesses varied within 0,006 and 0,148. The biggest genetic distances were obtained between accesses "52" and "61"; in 2007, the first one produced more than 25 fruits and the second one, none. The smallest genetic distances were verified between accesses "63" and "55" and between "19" and "59". Both groups showed close production values. RAPD molecular markers showed that, even inside the same species, there is genetic variability between plants with different productions, standing out molecular techniques importance as auxiliary instruments selection in breeding programs.

Costa C.J.,Embrapa Clima Temperado | de Araujo R.B.,Nufarm Industria Quimica e Farmaceutica | Boas H.D.C.V.,Embrapa Transferencia de Tecnologia
Pesquisa Agropecuaria Tropical | Year: 2011

Most of the tropical forages is affected by seed dormancy, which can hinder the determination of its physiological quality, field seedling emergence, and the establishment of pastures. This study aimed to evaluate the effectiveness of acid scarification and application of germination promoters on the dormancy release of stored seeds of Brachiaria humidicola. Seeds stored during nine and 21 months were scarified with the aid of concentrated sulfuric acid. Afterwards, the seeds were placed to germinate on a blotter paper moistened with the following solutions: KNO3 (0.2%), gibberellic acid (100 mg L-1), H2O2 (0.30%), and distilled water. The seeds remained for 21 days under an alternating temperatures regime (15-35°C) and light cycles (8 hours of light/16 hours of darkness), when the percentages of germination and dormant seeds were evaluated. Acid scarification was more effective on dormancy release in the seeds stored up to nine months, in comparison to the ones stored for 21 months, with reduction of dormant seeds percentage from 84% to 36%. Acid scarification of seeds stored up to nine months, followed by the gibberellic acid treatment, or the storage of seeds up to 21 months resulted in a 60% germination rate. The storage of B. humidicola seeds up to 21 months is more effective for dormancy release than the acid scarification or the application of germination promoters.

Junqueira K.P.,Embrapa Transferencia de Tecnologia | Faleiro F.G.,BR 020 | Junqueira N.T.V.,BR 020 | Bellon G.,BR 020 | And 2 more authors.
Revista Brasileira de Fruticultura | Year: 2010

Brazilian savanna pitayas naturally vegetate on solid rocky sandstone or quartzite, tree trunks and on rocky fields sand soils at Minas Gerais, Goiás, Distrito Federal, Tocantins, Rio de Janeiro and Bahia, with strong evidences that Brazil central region is the biggest pitayas dispersion center, because of the wide phenotypic diversity observed in collected accesses. The objective was to realize genetic diversity study of 13 pitaya accesses maintained at Embrapa Cerrados germoplasm collection through RAPD (Random Amplified Polymorphic DNA) molecular markers. Each access genomic DNA were extracted and fourteen decamer initiators were used to obtain RAPD molecular markers, that were converted in a binary data matrix, from where we estimate genetic distances between accesses and realize grouping and graphic dispersion analysis. 162 RAPD markers were obtained, making 11,57 markers medium per primer. From all the markers, 154 (95,06%) were polymorphic. Genetic distances varied within 0,088 and 0,848, the biggest values observed refer to distance between Unaí, MG access and Seleção Embrapa Cerrados access. The most different access was "Unaí, MG", that showed 0,675 of genetic distance average in relation to others accessions. The high genetic distance verified is due to the fact that the referred accesses do not belong to the same species. Pitaya accesses groups had little relation to their geographic origin. The genetic diversity found at the Brazilian savannas allows including this biome at pitaya species diversity center, showing good perspectives to studies about this fruit potential.

Raseira M.C.B.,Brazilian National Council for Scientific and Technological Development | Nakasu B.H.,Pesquisador aposentado da Embrapa Clima Temperado | Ueno B.,Pesquisador da Embrapa Clima Temperado | Scaranari C.,Embrapa Transferencia de Tecnologia
Revista Brasileira de Fruticultura | Year: 2010

The peach breeding program of Embrapa Clima Temperado has, among the objectives the development of fresh market cultivars that fulfill the consumer's preference. Some of the largest consumer centers, such as São Paulo and Curitiba, prefer white flesh peaches with sweet flavor. Cultivar BRS Kampai originated from a crossing between 'Chimarrita' and 'Flordaprince', adds the low chilling requirement, advantageous for subtropical areas, to the good appearance and superior flavor to any of the parents. The harvest period of this cultivar begins mid November, in Pelotas, RS, (and in the second half of October, in Atibaia, SP) a few days before Rubimel (yellow flesh) and Premier (white flesh) cultivars being a good substitute for the last one.

Silva D.B.,Embrapa Recursos Geneticos e Biotecnologia | Vieira R.F.,Embrapa Recursos Geneticos e Biotecnologia | Cordeiro M.C.T.,Embrapa Recursos Geneticos e Biotecnologia | Pereira E.B.C.,Setor Leste Universitario | Pereira A.V.,Embrapa Transferencia de Tecnologia
Revista Brasileira de Plantas Medicinais | Year: 2011

Brosimum gaudichaudii Tréc. (mama-cadela) is a medicinal plant native to Cerrado and largely used in traditional medicine. The aim of this study was to verify the propagation of mama-cadela by means of root cutting under the effect of plant growth regulators and different substrates. In experiment 1, the effects of indole butyric acid (IBA) and naphthylacetic acid (NAA) at the concentration of 1000 mg L-1 were evaluated together with three substrates (S1 - sand; S2 -75% sand + 25% commercial substrate; S3 - 50% sand + 50% commercial substrate). In experiment 2, 4 IBA levels were evaluated: 0 - control; 250 mg L-1 (1.3426 mM); 500 mg L-1 (2.6853 mM) and 1000 mg L-1 (5.3706 mM), as well as 4 NAA levels: 0 - control; 250 mg L-1 (1.2295 mM); 500 mg L-1 (2.458 mM) and 1000 mg L-1 (4.918 mM). The adopted experimental design was in randomized blocks with three replicates of six cuttings per plot. In experiment 1, substrates containing sand and sand (75%) + commercial substrate (25%) promoted the highest average rooting indexes. Application of IBA (1000 mg L-1) led to increases of 30.8% and 51.3% in the average rooting indexes compared to control and NAA application, respectively. In experiment 2, there was a significant quadratic response of IBA application on the average rooting index. The level of 500 mg L-1 (2.6853 mM) promoted the highest average rooting index. There was no significant effect of NAA levels for the evaluated parameters. Similarly, there was no significant effect of substrates or hormones on the remaining parameters evaluated. These results show the potential use of mama-cadela root cuttings for the production of clonal seedlings of this species.

Mendonca K.H.,Federal University of Goais | Duarte D.A.D.S.,Federal University of Goais | de Melo Costa V.A.,Federal University of Goais | Matos G.R.,Embrapa Transferencia de Tecnologia | Seleguini A.,Federal University of Goais
Revista Ciencia Agronomica | Year: 2013

In Brazil, 60% of the area planted with banana are of the Prata, Prata Anã and Pacovan cultivars, However, despite the importance and representativeness of these genotypes they are all susceptible to the major pests and diseases of this crop. The objective here was to evaluate the growth, development and yield of 23 banana genotypes: Caipira, Calipso, Bucaneiro, FHIA-02, FHIA-17, Thap Maeo, FHIA-01, FHIA-18, PA42-44, PA94-01, ST42 -08, PV42- 53, PV42-142-34 and PV79, PV94-01, PV42-81, YB42-21-03 YB42, YB42-07 Pacovan, Prat, Prata Anã, Maçã and Grand Naine in the city of Goiânia, in the state of Goiás, with a view to matching genotypes to commercial production systems in the region. The experiment was carried out at Embrapa Technology Transfer at the Goiânia Business Office. An experimental design of randomized blocks with three replications was adopted. The following characteristics were evaluated: plant height, pseudostem circumference, number of living leaves at flowering and at harvest, flowering and harvest cycle of the first bunch, number of hands per bunch, fruit weight, bunch and hand weight, fruit number, length and diameter. Data underwent variance analysis and the means were compared by the Scott-Knott test at 5%. The results of this work qualify the cultivars FHIA 17, Tropical, FHIA 01, Grand Naine and Buccaneer as promising for incorporation into the production systems of the region.

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