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Asian Journal of Plant Sciences

Year: 2010 | Volume: 9 | Issue: 2 | Page No.: 67-73
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Authors

A. Shirinzadeh

R. Zarghami

A.V. Azghandi

M.R. Shiri

M. Mirabdulbaghi

Keywords

In order to study the effect of water stress exerted to seeds of corn hybrids in their various stages of growth on their yield and determining their level of tolerance, a split block experiment based on completely randomized block design with 3 replications was conducted in Agriculture and Natural Resources Research Center of Moghan, Ultan, Parsabad, Ardabil province, Iran. The experimental factors included 4 irrigational regimes (normal irrigation and cease of irrigation in vegetative, flowering and seed filling stages) and 7 commercial corn hybrids. Drought tolerance indices including stress susceptibility index, tolerance index, mean production, geometric mean of production, stress tolerance index and harmonic average were estimated based on seeds yields of the genotypes studied under water stress and non-stress conditions. It was found that in addition to the significant correlation between each of indices and seed yield, there were also statistically significant correlations between these indices under stress and non-stress conditions. Furthermore, as stress tolerance index could separate the group A from other groups, it was selected as the most appropriate index for selection of stress tolerant genotypes. Therefore, only stress tolerance index and yields under stress and non-stress conditions were applied to design three-dimensional figures and observed that the genotypes SC647 and SC704 were the most tolerant cultivars.
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