Genetic analysis of some physiological traits in bread wheat under drought stress

Physiological traits are very important in wheat breeding programs for drought prone environments. However, there is not enough information about genetic control of these traits. In order to study genetic control of some physiological traits, a half diallel crosses with nine cultivars of wheat was performed. Parents and F2 hybrids were planted in a randomized complete block design (RCBD) with three replicates in Shahid Bahonar Universi-ty research field in 2013. Physiological traits including chl a, chl b, chl T, protein ,proline were evaluated. Diallel results based on method 2 of Griffing B model showed that GCA and SCA were highly significant for all traits. Results showed that the most of genetic variation was due to non-additive genetic variance. In the following, Hayman and Jinks analysis was done.The broad sense heritability for traits was between 0.51 to 0.69 and nar-row sense heritability was varied between 0.12 to 0.35. Hayman,Jinks analysis was showed that the control of genes action for traits was to overdominance. For breeding of these traits,Bulk, Bulk seed discent and Double haploeid method suggested.