Association analysis of some morphological traits of wheat (Triticum aestivum L.) under field stress conditions
2006
Bhutta, W.M.(University of Agriculture, Faisalabad (Pakistan). Centre of Advanced Study in Applied Genetics and Saline Agriculture) E-mail:[email protected] | Ibrahim, M.(University of Agriculture, Faisalabad (Pakistan). Inst. of Soil and Environmental Sciences) | Tahira(Pakistan Agriculture Research Council, Islamabad (Pakistan))
Twenty-four breeding lines were tested in a randomized complete block experiment design. Positive significant correlation coefficients were obtained for association between survival rate treatment I (0.35) and III (0.34), leaf venation (0.51), stomatal frequency (0.39), osmotic pressure (0.30), flag leaf area (0.85), number of tillers per plant (0.70) with grain yield per plant at both phenotypic and genotypic levels. A negatively significant correlation between hygrophilic colloids (-0.15) and epidermal cell size (-0.22) with grain yield per plant was obtained at phenotypic and genotypic levels. Path coefficient analysis revealed that flag leaf area (1.34), root/shoot ratio (0.51) and survival rate II (0.56) had the highest positive direct effects on grain yield, whereas hygrophilic colloids (-0.24) and osmotic pressure (-0.07) had a negative direct effect on grain yield. Flag leaf area is thus an important component of yield.
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