Abstract
Vineyard peach native population in our country represents important and rich source of genetic variability. Establishment of the genetic gain and differences concerning genetic variability are very important in selection of the genotypes with different usability. In according to the start up population and after selection of 25% intensity important properties such as fruit quality indexes were examined. Those were fruit weight, output, appearance, taste, aroma, soluble solid and total sugar content and titratable acidity. Besides variability components, coefficient of variation and heritability coefficient, expected and realized genetic gain was determined as well. In the start up population the lowest variability was established for output (CV=1.3%) and the highest for titratable acidity (CV=28.4%). For all analyzed characteristics, medium up to high values for heritability coefficient were determined in both start up population and selected genotypes. As a result of the selection in all properties came to genetic variance decreasing except in fruit appearance. Realized genetic gain was on the level or little lower that expected one for the majority of the properties.
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