Evaluation of correlation among traits in corn hybrids under drought stress conditions
Journal Title: International Journal of Farming and Allied Sciences - Year 2014, Vol 3, Issue 10
Abstract
In order to analyze genetic variation and the relationship between some agricultural characteristics with the yield of 14 corn hybrids, an experiment was carried out in split plot based on randomized complete block design. In this experiment a number of characteristics including morphological traits, yield and yield components in three different irrigation conditions (normal condition, mild drought stress and severe drought stress) were evaluated. For all the characteristics under investigation except ear diameter, a significant difference was observed between the levels of water stress and the hybrids under investigation. According to the Pearson correlation table, there exists a high and significant correlation between most growth and yield characteristics, the most positive and significant Pearson correlation was observed between the number of leaves per plant and the number of rows in maize and then between the leaf of flag and length of corn. On the other hand the most significant negative correlation was observed between leaf area of flag leaf and the extent of leaf rolling (%). The stepwise regression analysis in the average stress condition showed that the number of rows per ear, 300-seed weight, number of kernels per row, number of leaves per ear explained totally 83% of kernel yield variation. Based on the path analysis, the highest direct effect on kernel yield has been related to the number of rows in the corn.
Authors and Affiliations
Jamileh seyedzavar, Majid Norouzi, Said Aharizad and Behnam tahmasebpour
Keywords
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