Genetic Analysis of Physiological Traits and Grain Yield in Bread Wheat under Drought Stress Conditions

Author: A. Eftekhari*, A. Baghizadeh**, R. Abdolshahi*** and M.M. Yaghoobi****

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Abstract

Physiological traits are very important in wheat breeding programs for drought prone environments. In order to study genetic parameters, 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 research field during 2013. Physiological traits including chla, chlb, chlT, carotenoids, protein, proline, carbohydrates, antioxidant enzymes (CAT, APX and GPX) and grain yield 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 0.49 to 0.74 and narrow sense heritability was varied between 0.12 to 0.35. Hayman, Jinks graphical analysis was showed that the control of genes action for traits was to over domi

Keywords

Bread wheat, Drought stress, Gene action, Half diallel cross, Heritability, Physiological parameters

Conclusion

Totally due to the amount of moderate - to - low broad sense heritability, relatively low Baker ratio and narrow sense heritability concluded that for the physiological traits in this research selection in advanced generations after arrival to homozigosity and genetically fixed should be done. For breeding of these traits, Bulk, Bulk seed discent and Double haploeid method suggested.

References

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How to cite this article

A. Eftekhari*, A. Baghizadeh, R. Abdolshahi and M.M. Yaghoobi (2016). Genetic Analysis of Physiological Traits and Grain Yield in Bread Wheat under Drought Stress Conditions, Biological Forum – An International Journal 8(2): 305-317.