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Canopy Management of Table Grapes Cultivar in Tropical Conditions

Journal of Agricultural Science and Technology(B) 2018年第4期8卷 228-233页

作者： patricia coelho de souza leao Maria Auxiliadora coelho Lima Embrapa Semiarido BR 428 Km 152 Zona Rural Petrolina PE PO Box 23 Zip Code 56.302-970 Brazil

The production of some seedless table grapes under tropical conditions presents low bud fertility on the main canes and low yield, which leads to the need of pruning in the lateral shoots. The objective of this study was to evaluate the influence of the canopy management for the formation of lateral shoots associated with dellsity of canes on the yield and quality of grapes ＂Sugraone＂ in the Sao Francisco Valley. The experiment was carried out over two growing seasons （2011-2012） in a commercial vineyard of Sugraone in Petrolina, Pernambuco state, Brazil. The treatments consisted of two canopy managements （shoot topping associated to elimination of lateral shoots and shoot topping and formation of lateral shoots） combined with two to three densities of canes after pruning （1.8, 2.8 and 3.8 canes/m^2）. The formation of ＂lateral shoots＂ increased yield and number of clusters per plant during two consecutive growing seasons, besides using 2.8 varas/m^2 resulted in highest yields only in 2011 growing season. The variables mass bunch, mass berry, soluble solids （SS）, soluble sugar, titxatable acidity （TA） and pulp firmness were not affected by treatments, while the attributes related to color, as like brightness and hue angle of the skin, and total extractable polyphenols content were influenced by canopy management, especially in the 2012 growing season. Shoot topping to induce formation of laterals shoots associated with density of 2.8 canes/m2 increased the yield of seedless grapes cultivar Sugraone grown in the Sao Francisco Valley, not significantly affecting the quality of the grape.

关键词： Vitis vinifera L. seedless grapes tropical viticulture.

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Evaluation of Some New Wine Grape Cultivars under S^o Francisco Valley Conditions

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Journal of Agricultural Science and Technology(B) 2017年第5期7卷 320-325页

作者： patricia coelho de souza leao Bruna Thais Goncalves Nunes Emille Mayara Carvalho de souza Jessica Islane de souza Rego Jose Henrique Bemardino do Nascimento Embrapa Semifrido BR 428 Km 152 Zona Rural PO Box 23 Petrolina 56302-970 Pernambuco State Brazil Universidade de Pernambuco (UPE) Petrolina 56302-970 Pernambuco State Brazil

This study aimed to evaluate the performance and characteristics of the grapes as subsidies to the recommendation of new wine grape cultivars for the S^o Francisco Valley. An experiment was carried out in Petrolina, Pernambuco state, during four seasons in 2014 and 2015 and the treatments were represented by 10 cultivars and three breeding selections： Grenache, Tempranillo, Merlot, Cabernet Sauvignon, Malbec, Petit Verdot and Syrah for red wines and Sauvignon Blanc, Chardonnay, Chenin Blanc and breeding selections 46, 14 and 47 for white wines. The experimental design was a randomized block with four replicates and two useful plants per plot. The following variables were evaluated： sprouting, bud fertility rate, Ravaz index, production, number of clusters, weight, length and width of cluster, weight and volume of 100 berries, soluble solids and titratable acidity. A better balance between production and vigour was obtained in Grenache, Merlot and Tempranillo cultivars, presenting values of 7.56, 6.50 and 5.93, respectively, for Ravaz index. Grenache, Chenin Blanc and Tempranillo were the most productive cultivars with average yields estimated at 10.4, 8.7 and 8.4 ton/ha/season. Selection 14 had longer, wider and less compact clusters, which can reduce clusters rottenness. The percentage of sprouting ranged from 38.13% in selection 14 to 77.6% in cv. Chenin Blanc. The average index of bud fertility was 0.79 cluster/bud, with no significant differences among cultivars. Greater potential for sugar accumulation was found in the selections 14, 46 and 47, while the titratable acidity ranged from 0.63% in cv. Merlot to 0.89% in selection 47. Grenache and Tempranillo have showed potential to obtain adequate yield and balanced vines, while Sauvignon Blanc, Chardonnay, Cabemet Sauvignon, Malbec and Petit Verdot presented low yield being necessary to select clones more productive and well adapted to the tropical conditions. Further information about the quality of grapes and w

关键词： Tropical viticulture wine grape yield.

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Immature Embryo Rescue and in Vitro development Evaluation of Intraspecific Hybrids from Brazilian Seedless Grapevine“Superior×Thompson”Clones

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American Journal of Plant Sciences 2014年第13期5卷 1956-1960页

作者： Eiryanne Fonseca de Menezes Eliene Matos e Silva Adriana Mayumi Yano-Melo patricia coelho de souza leao Natoniel Franklin de Melo State University of Feira de Santana—PPG on Plant Genetic Resources Feira de SantanaBrazil Federal University of Pernambuco—PPG in Biology of Fungi RecifeBrazil Federal University of Vale do Sao Francisco-CCA/CZOO PetrolinaBrazil Embrapa Semi-Arid Tropical Biotechnology LaboratoryPetrolinaBrazil

The fruit production for export is an economically significant activity in the Valley of S?o Francisco River, especially in the irrigated lands of Petrolina-PE/Juazeiro-BA, Brazil. The development of new genetic material most suitable to the tropical climate and the demands of the consumer market have led to the selection of new seedless grapes cultivars. In this case, the use of the embryo rescue technique has produced satisfactory results for obtaining such materials, especially in the semiarid region. This study aimed to evaluate the in vitro development of intraspecific hybrids of grapevine (Vitis vinifera L.), derived from the rescue of immature embryos resultant from the crossing of “Superior Seedless” and “Thompson Seedless” Brazilian clones. To establish and develop the cultivation, the culture media was supplemented with 30 g/L sucrose, 0.1 g/L myo-inositol, 0.002 g/L glycine, 0.1 mg/L indoleacetic acid (IAA), 6.5 g/L of agar, adjusted pH to 5.7. The experiment was evaluated after 90 days. The variables measured were: number of nodes, number of leaves, plant height (cm), number of roots and length (cm) of the root system and internodes. The period of 60 days of in vitro culture of ovules resulted in the highest values of embryos (about 50%), as well as better characterized developmental stages with higher germination (47.3%). The three types of hybrid grapes evaluated in micropropagation showed very similar values of the measured parameters, even having originated from embryos of different developmental stages.

关键词： Vitis vinifera Seedless Grapes in Vitro Embryo Cultivation

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