Studies on Correlation and Path Analysis in Medium Duration Rice Varieties of Andhra Pradesh, India

The present study was conducted to investigate the correlation and path analysis in twenty-five medium duration (120-125 day) rice varieties (Oryza sativa L.). Rice (Oryza sativa L) is a critical staple cereal crop that feeds more than half of the world's population. The character association of yield attributing traits revealed a significant positive relationship between plant height, 1000 seed weight, and panicle length and grain yield per hectare. As a result, selecting for these traits can improve yield. In the current study, a high genetic coefficient of variation was observed for number of seed/panicle, along with high heritability and genetic advance, indicating that there is room for improvement of the trait through simple selection. Following panicle length, 1000 seed weight had the greatest positive direct effect on yield, according to a path coefficient analysis. The characters 1000 seed weight and panicle length had a high direct effect as well as a positive association. Therefore, choosing these characters could result in an improvement in yield and yield components.