Paper Details

Effect of drought stress on yield and osmotic regulator of tetraploid and hexaploid wheat genotypes

Farshad Sorkhi, Mojtaba Fateh

DOI: https://dx.doi.org/10.12692/ijb/5.6.41-46

Int. J. Biosci. 5(6), 41-46. September, 2014. (PDF)

Abstract:

For Study the effect of drought stress on yield and osmotic regulator of tetraploid and hexaploid wheat genotypes an experiment was carried out at Research Station of Islamic azad university of Miandoab in 2012. The soil texture of experimental site was sandy clay loam. The research field was located in a semi-arid region. This experiment was conducted as factorial based on completely randomized block design with three replications. Drought levels were A: control (normal condition), B: no irrigattion of fertilization stage, C: no irrigattion of grain filling stage. Studied genotypes were hexaploid of bread wheat ‘Sabalan’ and ‘Zarrin’ and tetraploid of durum wheat ‘PGS 01-60-335’ and ‘IDW 01-61-130’. Plant density was 400 plants m-2. In the present experiment data showed that under severe drought stress (non-irrigated stage of pollination) situations, the highest and the lowest grain yield belonged to tetraploid genotype of durum wheat ‘IDW 01-61-130’ and hexaploid genotype of bread wheat ‘Zarrin’. Under severe drought conditions, the highest decrease in grain yield as well as concomitant increase in proline content were seen in bread wheat of ‘Sabalan’ and ‘Zarrin’. However, the highest amount of grain yield and proline content were observed in Durum wheat of ‘PGS 01-60-335’ and ‘IDW 01-61-130’. In total, drought stress had adverse effects on yield of wheat genotypes had negligible potential to compensate the deteriorative effects of drought condition and these condition tetraploid durum wheat for the cultivation and production of superior hexaploid wheat bread