Variability pattern in psyllium

Phenotypic and genotypic coefficient of variability, heritability in broad sense and genetic advance as percentage of mean were studied for ten quantitative characters in 39 genotypes of isabgol (Plantago ovata Forsk). Number of spikes per plant and biological yield had high estimates of genotypic coefficient of variation, heritability and genetic advance as percentage of mean which suggests that direct selection for these traits would be fruitful in the improvement of this crop. Heritability estimates was highest in 1000 seed weight and lowest in spike length.