بررسی خلوص ژنتیکی پارت‌های بذری گندم در کرت‌های کنترلی.

Objectives of the study were to identify genetic purity of wheat cultivars. After plant emergence 20 plants in each plot were randomly selected and marked to evaluate during growth periods. The evaluations were based on ZODEX scale. Registration of morphological traits according to U.P.O.V was done. Parametric and non-parametric data were analyzed as a one-way and grouped as a clusters using SAS statistical package. Results indicated that estimated variation indices of wheat cultivars for growth habit, frequency of plants with recurved flag leaves, time of ear emergence, glaucosity of ears and necks, ears shape in profile, awns or scurs, straw: pith in cross, ears and grains color were nil. Therefore, these traits can not be used in screening for genetic purity of wheat cultivars. However, cluster analysis indicated that these traits may be used for differentiating between cultivars. Although not only high variation in lower glume shoulder shape and width and lower glume beak shape and length in spikelet in midthird of ear within a single cultivar, showed genetic impurity but also these could still be used as indices for screening for genetic purity of different cultivars by breeders.