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A method for obtaining upgraded apple varieties with genetic resistance to diseases

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Author(s): Valeria Petre | Gheorghe Petre

Journal: Scientific Papers of the Research Institute for Fruit Growing Pitesti, Romania
ISSN 1584-2231

Volume: XXVI;
Start page: 51;
Date: 2010;
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Keywords: new methods for obtaining of apple tree breeds | with shortening of the period | performing

ABSTRACT
In the genetic breeding programs, conventional methods namely the intra- or interspecifichybridation are used for obtaining of new breeds –, need a long duration (34-27 years) and high costs. The new method, by shortening of the period for obtaining genetic disease resistant apple tree breeds, replaces the hybrids selection field with a field of elites, selected in the juvenile phase from the fortification field, according to the growth and disease resistance pecularities, grafted on dwarfing rootstock (M9), planted on definitive places, at a distance of 3x0,5m. The possibility is created to select elites according to their disease resistance character and their fruit quality, during 3-4 years - and their rapid transfer into the second stage field trials. The researches performed at the Tree Growing Research & Development Station Voineşti in the period 2007-2009 point out the fact, that by promoting of chain loops for shortening the duration in the improvement process, the period is shortened by 30-35%, as compared to the conventional method (25-28 years); the field area destined for the selection is reduced by almost 5 times – and the costs for the creation and the putting into account of a new breed decrease to a considerable degree.

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