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RESULTS OBTAINED BY THE PROMOTION OF THE METHODOLOGY OF SHORTENING THE DURATION OF CREATING GENETIC DISEASE RESISTANT APPLE TREE CULTIVARS

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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: XXVII;
Start page: 51;
Date: 2011;
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Keywords: methods | shortening period | performance solutions

ABSTRACT
The creation of new cultivars, as any productive activity, is a continuous process and is based on a technology, whose chain loops must be continuously perfected, in order to increase the efficiency. In the genetic improvement programmes, for obtaining new cultivars, the conventional methods are used – the intra- or the inter-specific hybridization, characterized by a long duration (24 - 27 years) and by high costs. The new method, with shortening of the period of obtaining the genetic disease resistant apple tree cultivars, replaces the selection field of the hybrids on own roots with a field of elites, selected in the juvenile phase from the fortification field, according to the growing and disease resistance peculiarities, grafted on low vigour rootstock (M9), planted at the definitive place at the distance of 3 x 0.5 m. The possibility to select elites is created, according to their character of resistance against diseases and to their fruits quality, during 3 - 4 years – and then the rapid transfer into competition micro-cultures. The researches performed at the Research Station for Fruit Growing (RSFG) Voinesti during the 2007-2010 period, point out the fact that, by promoting of chain loops for shortening the duration of obtaining of the genetic disease resistant apple tree cultivars in the process of improvement, the time period is reduced by 30-35%, as compared to the conventional method (25 - 28 years) - and almost 5 times the area for the selection fields - and to a significant amount the costs for the creation and the putting into account of a cultivar.
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