Research Article Multivariate Analysis of Grain Yield and Its Attributing Traits in Different Maize Hybrids Grown under Heat and Drought Stress

which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This study was carried out to evaluate F1 single cross-maize hybrids in four crop growing seasons (2010–2012). Morphological traits and physiological parameters of twelvemaize hybrids were evaluated (i) to construct seed yield equation and (ii) to determine grain yield attributing traits of well-performingmaize genotype using a previously unexploredmethod of two-way hierarchical clustering. In seed yield predicting equation photosynthetic rate contributed the highest variation (46%). Principal component analysis data showed that investigated traits contributed up to 90.55 % variation in dependent structure. From factor analysis, we found that factor 1 contributed 49.6 % variation