Analysis of genetic variance components for number of leaves and branches per plant and stem diameter was done according to the method of HAYMAN (1954). Heritability in narrow (h2a) and broad (h2b) sense was determined for the same traits, using the method of Mather and Jinks (1971). Non-additive component of genetic variance was greater than additive component in all three studied traits. Dominant and recessive genes were not equally distributed in parent genotypes, with dominant genes prevailing. Ratio (H1/D)1/2 was higher than 1 in all three tested traits. Calculated values for heritability in narrow sense showed that stem diameter and number of branches per plant are traits with low heritability, and number of leaves per plant a trait with the high heritability. Heritability in a broad sense Was high for all three tested traits.
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Marinković et al. (2003) studied this question.
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