Correlation coefficient analysis between grain yield and İts components in corn (Zea mays L.) hybrids

In order to study of the correlation coefficient analysis between grain yield and its components in maize hybrids an experiment was carried out in randomized complete block design with four replications in Shahrood Agricultural Research Station during 2006-07. The result of correlation analysis between grain yield and other traits showed that number of grains per ear and 100 grain weights had high and positive direct effects and ear length had positive and moderate direct effect on yield. Furthermore, ear height had low and negative direct effect on grain yield