Genetic and phenotypic correlations between oil content and morphological traits in high oil maize population NSU1

In this paper we are studied correlations between grain yield and oil content, on one side, and morphological traits of plant and ear, on the other side, in two testcross maize populations. In testcross combination NSU1 × 568/II NS, oil content had positive genetic correlation with all studied traits. At the second studied population, NSU1 × B73, oil content had positive correlation only with ear height and ear length, while correlation between oil content and plant height and kernel row number were negative. Between other studied traits, at 568/II testcrosses, the strongest relationship was found between plant and ear height, and at B73 testcrosses between plant height and ear length. In NSU1 × 568/II NS, oil content had positive phenotypic correlations with all traits, except, with a kernel row number. In the second studied population, phenotypic correlations between oil content and all traits (except ear length) were negative. The highest value of phenotypic correlation between another studied traits, in NSU1 × 568/II NS testcross combination, was found between plant and ear height, and in NSU1 × B73, between plant height and kernel row number.