Morphological attributes and production components of potato cv. Baronesa and its transformed genotype

Abstract

ABSTRACT. The aim of this paper was to compare the morphological attributes and production components of the wild-type Baronesa cultivar potato with those of Baronesa potato plants that have been genetically modified using the potato virus Y coat protein (CP) gene. The experiment was conducted under greenhouse conditions (Biosecurity Quality Certificate no. 081/98 issued by the National Biosecurity Technical Committee) at the Federal University of Pelotas (UFPel), Pelotas-RS. The shoot and root lengths and the mean leaf number were determined six times at 14-day intervals after sowing; the length, width and fresh weight of the tubers were measured during the last harvest, which occurred 84 days after sowing. There were no statistical differences between the two genotypes with respect to morphological attributes or production components.Keywords: Solanum tuberosum, genetic modification, virus resistance. RESUMO. Atributos morfológicos e componentes de produção de batata, cv.Baronesa e seu genótipo transformado. Plantas de batata, cv. Baronesa, resistentes ao PVY foram obtidas mediante transformação genética com gene que codifica para a proteína do capsídeo do vírus. O presente trabalho teve por objetivo comparar os atributos morfológicos e os componentes de produção da cv. Baronesa e de suas plantas geneticamente modificadas, em condições de casa de vegetação. Desse modo, a altura da parte aérea, comprimento da raiz e número médio de folhas foram determinados em seis épocas a intervalos regulares de 14 dias após o plantio, enquanto, volume, comprimento, largura e massa fresca dos tubérculos foram medidos na colheita final, aos 84 dias após o plantio. Não houve diferenças estatísticas significativas entre os dois genótipos, no que concerne aos atributos morfológicos e nem nos componentes de produção.Palavras-chave: Solanum tuberosum, transformação genética, resistência a vírus.

Economic Aspects of Zinc Oxide Fertilization in Yam (Dioscorea alata L.) in a Semi-Arid Region of Brazil

“…Notably, the higher nutritional requirement of yams is associated with the macronutrient's nitrogen, phosphorus, and potassium [16], confirming Dare et al's (2014) [17] report that the equivalent intake of 90 kg of N, 40 kg of P, and 74 kg of K ha −1 increased tuber production. On the other hand, research has already shown the essentiality of applying micronutrients to tubers [18,19]. Thus, the productive success of yams depends on the adequacy of agronomic practices, including nutritional management adapted to each producing region [20].…”