Path coefficient analyses of grain yield and harvest grain moisture in maize

Abstract

This study was undertaken to identify the direct and indirect effects of several traits on grain yield and harvest grain moisture in maize (Zea mays L.) using path coefficient analysis. Phenotypic and genotypic correlation coefficients were used separately to calculate phenotypic and genotypic path coefficients, respectively. Selection for an increase in cob weight and plant height, and for a decrease in the number of growing degree days to mid-silking would be effective in increasing grain yield, and also heavier cobs and fewer growing degree days to mid-silking would aid in reducing harvest grain moisture. Lighter husks with fast-drying ability would also be conducive to lowering harvest grain moisture. As cob-weight and husk weight were positively correlated, a compromise would have to be reached for simultaneous selection of these two traits.