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Abstract


Determining the Relationships Between Grain Yield and Yield Components in Hybrid Maize Populations by Path Analysis
A clear assessment of association and relative contribution of yield components is of utmost importance in improving stable and high yielding genotypes for a range of environments. In this study, the data for grain yield and certain related attributes (plant height, ear length, ear diameter, ear row number, row grain number, ear grain number, and thousand grain weight) in a population consisted of 21 F| maize hybrids derived by half diallel crossing among seven maize inbreds were studied to determine yield and yield component relationships using correlation and path coefficient analysis. The grain yield was positively correlated with all the characters investigated. Path coefficient analysis revealed that number of grains on ear had the greatest positive direct effect on grain yield followed by thousand grain weight, row grain number, ear row number, and ear diameter, respectively. Direct effects for plant height and ear length were of negligible importance in determining com yield. In conclusion, in improving yield in corn a greater priority would be given for number of grains on ear and thousand grain weight.

Keywords
Maize correlation path analysis yield yield components


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