Variability and heritability coefficient of average dry matter content in onion (Allium cepa L.) bulbs

In order to research the variability of average dry matter content in onion bulbs, the trial has been set up on the experimental plot in the Centre for Vegetable Crops in Smederevska Palanka during 2000. and 2001. The trial has been performed by applying the method of random block design with five replicas. Ten cultivars of different geographical origin have been used. Examined characteristics were determined by applying the variance analysis of two-factorial trial - model 2. Hadzivukovic, 1991. The components of phenotype variance, genotype and phenotype coefficient of variance and heritability in broader sense have been calculated according to SINGH and CHAUDHARY (1976). The significant variability has been found for dry matter content in bulbs during both years of research. The researched trait had a greater genotype variance than out door conditions factor variance and the coefficient of phenotype variation greater than genetic variance coefficient. High percentage of genetic variability in total phenotype variability has been confirmed by high heritability. .