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Resistance of genetically modified potatoes to Potato virus Y under field conditions PAB
Dusi,André Nepomuceno; Oliveira,Cristiane Lopes de; Melo,Paulo Eduardo de; Torres,Antonio Carlos.
The objective of this work was to evaluate the resistance of genetically modified clones of potato to Potato virus Y (PVY) under field conditions. Genetically modified plants were compared with nontransformed plants of the same cultivar. The plots were flanked with potato plants infected with both PVYº and PVY N strains (spread lines), in order to provide the experimental area with the source of virus, which was naturally spread by the native aphid population. The experiment was weekly monitored by visual inspections and by DAS-Elisa in the plants produced from the harvested tubers, in order to evaluate the resistance of transgenic plants throughout the plant growth cycle. By the end of the third year, no infection symptoms were observed in the 1P clone;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum tuberosum; Coat protein gene; Genetically modified organism; Transgenic potato; Viral resistance.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000900009
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Geographic pattern of genetic diversity in natural populations of Rosewood (Aniba rosaeodora), in the Central Amazonia Acta Amazonica
Santos,Ronaldo Pereira; Ângelo,Paula Cristina da Silva; Sampaio,Paulo de Tarso Barbosa; Quisen,Regina Caetano; Leite,Ângela Maria Conte; Oliveira,Cristiane Lopes de.
Rosewood (Aniba rosaeodora Ducke, Lauraceae) is an Amazonian evergreen tree and a source of the purest linalool, the main component of its essential oil, which is very valuable in the international perfumery market. After decades of over-exploitation it is currently considered as threatened. We evaluated the genetic diversity and its distribution in four populations in Central Amazonia. Thirty-five reliable RAPD markers were generated, of which 32 were polymorphic (91.4%). Variation was higher within the populations (76.5%; p < 0.0001) and geographic distribution contributed to population differentiation (23.4%; p < 0.0001). The Amazon River had a small influence on gene flow (3.3%; p < 0.0001), but we identified evidence of gene flow across the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: RAPD; Linalool; Gene flow; Amazon Rainforest.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000300010
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