Rooting of hardwood cuttings of promising grapevine rootstocks for regions with history of plants’ death [Estaquia lenhosa de porta-enxertos de videira promissores para regiões com histórico de morte Plantas]
Bettoni J.C.,Bolsista CAPES |
Pereira Gardin J.P.,Experimental de Videira |
Feldberg N.P.,Embrapa Produtos e Mercado |
Costa M.D.,Pesquisador da Estacao Experimental de Lages |
Schumacher R.,University of Castilla - La Mancha
Revista Brasileira de Fruticultura | Year: 2015
The aim of this study was to evaluate the concentrations of indole-3-butyric acid (IBA) in hardwood cuttings of promising grapevine rootstocks for southern Brazil. Plant material was collected from selected plants from the grapevine rootstock collection of EPAGRI Experimental Station, in the city of Videira - SC. The experiment was conducted in a greenhouse during the period from July to October 2013. The experimental design was completely randomized with 20 treatments arranged in a 4x5 factorial scheme, consisting of four rootstocks (VR043-43, Dogridge, Richter 99 and EEV793-5) and five IBA concentrations (0 , 1.000 , 2.000, 3.000 and 4.000 mg L L-1). After 60 days, it was evaluated the rooting percentage, the number, length and the fresh weight of the roots. The use of IBA increased rooting percentage, number, length and fresh weight of roots for all rootstocks. The rootstock VR043-43 showed better root development than the other rootstocks studied. To propagate the four cultivars of grapevine rootstocks evaluated via hardwood cuttings it is recommended the use of IBA at 1000 mg L-1. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.
da Silva G.O.,Embrapa Hortalicas |
Bortoletto A.C.,Embrapa Produtos e Mercado |
Ponijaleki R.,Embrapa Produtos e Mercado |
Mogor A.F.,Federal University of Parana |
da Pereira A.S.,Embrapa Clima Temperado
Revista Ceres | Year: 2014
The objective of this study was to evaluate the performance of Brazilian potato cultivars, BRS Ana and BRS Clara, compared with the imported cultivars ágata and Asterix, for tuber yield characters. The experiments were carried out in Canoinhas, State of Santa Catarina. Four potato cultivars were evaluated: BRS Ana, BRS Clara, Asterix and ágata. The experimental design was randomized blocks with four replicates. Plots consisted of four rows with 20 plants in each row. The tubers of each plot were harvested and evaluated for traits related to tuber yield 110 days after planting. Data were submitted to analysis of variance and grouping of means by Skott & Knott at 5% of probability. Brazilian potato cultivars BRS Ana and BRS Clara provided higher yields than the imported Asterix and Ágata. On the other hand, they are later regarding the vegetative cycle.
Agostini-Costa T.D.S.,Embrapa Recursos Geneticos e Biotecnologia |
Gomes I.S.,Embrapa Recursos Geneticos e Biotecnologia |
Fonseca M.C.M.,Empresa de Pesquisa Agropecuaria de Minas Gerais Epamig |
Alonso A.M.,Embrapa Cerrados |
And 7 more authors.
Planta Medica | Year: 2016
Coumarin, o-coumaric, and kaurenoic acid are bioactive compounds usually found in the leaves of Mikania laevigata. Genetic and environmental variations in the secondary metabolites of plants may have implications for their biological effects. Three different accessions of M. laevigata cultivated in four sites between the Equator and the Tropic of Capricorn in Brazil were evaluated aiming to present potential raw materials and discuss relationships among these three bioactive compounds. The results revealed effects of plant accessions and environmental factors and suggested two contrasting chemical phenotypes of M. laevigata. The first phenotype presented the highest levels of kaurenoic acid (2283 ± 316 mg/100 g) besides lower levels of coumarin (716 ± 61 mg/100 g), which was also stimulated by the environment and mild climate at the site nearest to the Tropic of Capricorn. The other phenotype presented the lowest levels of kaurenoic acid (137 ± 17 mg/100 g) besides higher levels of coumarin (1362 ± 108 mg/100 g), which was also stimulated by the environment and tropical climate at the site nearest to the Equatorial beach. Copyright © 2016, Georg Thieme Verlag KG. 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.
Raseira M.C.B.,Embrapa Clima Temperado |
Franzon R.C.,Embrapa Clima Temperado |
Pereira J.F.M.,Embrapa Clima Temperado |
Scaranari C.,Embrapa Produtos e Mercado
Acta Horticulturae | Year: 2015
Although peach breeding programs in Brazil date back to the 1950s all cultivars released were public domain and there has not been any type of plant patent, royalties or similar, until 1997. Since that year all new cultivars may be protected. The main reason for the protection was the need to organize the propagation chain, once nurseries now need the certificate of origin, for all protected cultivars and only the licensee ones can have it. The first peach cultivars protected, in Brazil, were 'BRS Kampai', 'BRS Libra', released in 2009, and 'BRS Regalo' and 'BRS Fascínio', released in 2012. Except 'BRS Libra', all others are table cultivars. All four were obtained by Embrapa Clima Temperado through hybridization, using traditional breeding methods. 'BRS Libra' is the earliest non melting cultivar and is a very low chilling, estimated in less than 150 hours. The cultivars 'BRS Kampai', 'BRS Regalo' and 'BRS Fascínio' produce low acid white flesh fruits, and are being planted under the subtropical climate condition as well as on the temperate zone. 'BRS Kampai' is the earliest one, ripening in mid-November in the south, and at the second half of October in the southeast areas. The harvest of 'BRS Regalo' and 'BRS Fascínio' differs only a few days from each other, being at end of November in the Southeast, and 15 to 20 days later in Southern Brazil. A description of the four cultivars will be provided. Growers from six different Brazilian states have been participating in testing and evaluating the material before releasing, under a nonpropagation agreement. This procedure has been rewarding and gave a lot more confidence on the results. Once a new variety and the mother plants were registered and the protection process had begun, a call for nurseries interested in propagating them was published. © 2015 ISHS.