Determining the Heritability and Genetic Parameters of Antioxidant Enzymes Activity in Barley Cultivars

In order to study the heritability and genetic parameters of antioxidant activity in barely (Hordeum vulgare L.) under salinity stress, a seven-parent half diallel (F1 crosses + parents) was conducted non-stress salt stress (8 12 dS m-1) conditions greenhouse, during 2016-17, Ardabil, Iran. this experiment, enzymes ascorbate peroxidase (APX), catalase (CAT) superoxide dismutase (SOD) were measured. The results showed that had increased expression all three differed different levels. average degree dominance higher than unity for cases, suggesting control traits by over-dominance. Under saline condition narrow sense (h2n) found low medium (0.11-0.41) but their broad-sense (h2b) estimated relatively high (0.74-0.90). suggested lack heterosis these except APX 8 m-1 salinity. Results recessive alleles favorable, CAT activity, condition, dominant alleles, salinity, desirable; although, such relations not clearly revealed SOD activity. Due importance dominance, it indicated evaluation genotypes must be done at progressive breeding program. Based on general combining ability effects, concluded Rihane Nosrat favorable alleles. case SOD, Afzal Valfajr favourable spite physiological as selection criteria tolerance, presence large effects should neglected delayed until after some inbreeding.