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Abstract
For efficient selection of grain yield, like the most importance economic trait, in regard to its on the great influence the environmental factors, has complex mode of inheritance and low heritability, is necessary to know genotypic and phenotypic coefficient of correlations between grain yield and morphological traits of the plant and ear which are influencing on the grain yield. The objective of this paper was to determine relationship between grain yield and morphological traits, in 8 inbred lines and their hybrids. Strong genetic and phenotypic correlations were found between grain yield and other studied traits, except between grain yield, on one side, and kernel row number where we found medium correlations. Between other studied traits, the highest values of genotypic and phenotypic coefficient of correlations were found between ear length and cob weight.
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