Studies on path analysis in maize (Zea mays L.) for grain yield and other yield attributes

The studies were conducted to find out the yield attribute traits and their relationship in maize through path analysis. Knowledge on path analysis will also be of great help as it enhances the rate of improvement by laying the differential emphasis on the component characters during selection. This study revealed that grains per row recorded maximum positive direct effect on grain yield followed by ear length, ear girth, days to tasselling, total sugars and plant height. The maximum negative direct effect on grain yield was recorded by kernel rows followed by days to silking, crude protein, grain weight, days to maturity, shelling percentage and leaves above uppermost ear. Grains per row exhibited positive indirect effects via., ear length, ear girth, days to silking, plant height, total sugars and days to maturity. Based on the path analysis, the characters grains per row, ear length and ear girth were reliable for selection programme for grain yield improvement in maize. The residual effect on yield was low which inferred sufficient to explain grain yield and other yield contributing characters.