Variability of main agronomic, physiological and quality characteristics in apricot
1994
Balan, V. (Institutul de Cercetari pentru Cereale si Plante Tehnice, Fundulea (Romania)) | Ivascu, A. (Statiunea de Cercetare si Productie Pomicola, Baneasa-Bucuresti (Romania))
The investigations performed from 1982 through 1990 indicated the large amplitude of the original variability of main properties and characteristics in 61 species from 7 geographical regions, as well as of the variability induced by controlled hybridization and inbreeding favourable conditions were created, to detect worth-using genitors for the major genetic studies and establish apricot improvement strategies. The variability of such properties, such as "tree height", "crown height", "crown diameters" and resistance to pathogenic agents like Monilia laxa and Stigmina carpophila was induced under natural infection conditions, to Cytospora Cincta and to Pseudomonas syringae under in vitro inoculum conditions. Broad heritability (h2) in invred and hybrid offspring varied between 0.43-0.33 in point of "tree height", 0.27-0.47 in point of "crown height", 0.21-0.40 with the "long crown diameter" and 0.25-0.33 with the "short crown diameter". The moderate and wide variation of the quality of chemical components of the fruit and of the genetic transgressions occurred within the Excelsior-Goldrich family determined higher quality levels than in genitors. A steady focus on the variability spectrum of the characteristics and properties of hybrid offspring allowed 6 apricot elites to be selected between 1989-1990, in compliance with the proposed improvement goals
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