اعلانات هامة

The phenotypic variations of the natural forest communities the main source of material for breeding of trees, and improvement programs for these plants essentially start by selection processes in natural communities. The research aims to select Euphrates poplar trees with good phenotypic characterizes  in the selected sites and compared with the surrounding trees in growth and morphological scales.

The results showed that there is phenotypic variations presence of selection of individuals distinct in characteristics morphological and growth traits by doing the measurement data growth, and that site Obouhrdob 1 (S7) was the best sites when it has 780 points of 1000 possible, followed by site Obouhrdob 2 (S8), It is noted the of a kinship between the sites within the river islands with similar environmental conditions.

The results of the statistical analysis showed there were significant differences in the characteristics height, stem, length and straightness, diameter, and are non-significant in the other characteristics for the sites.

Key words: Euphrates poplar, selection, phenotypes.

تعتبر التباينات المظهرية للتجمعات الحراجية الطبيعية المصدر الرئيسي المتاح كمادة أولية من أجل عمليات التربية للأشجار، وتبدأ برامج التحسين لهذه النباتات بشكل أساسي بتنفيذ عمليات الإنتخاب ضمن التجمعات الطبيعية.