Science Heritage Journal | Galeri Warisan Sains (GWS)

The third-most important food crop in Nepal after rice and maize is wheat, widely known as the “king of cereals” and the most important food crop in the entire globe. The actions and combinations of several direct and indirect features lead to grain yield. While path coefficient analysis identifies direct and indirect effects of one variable on another and analyses cause-and-effect linkages among the characteristics, correlation coefficient is a measure of the degree of association between yield and yield attributing components. Plant breeders employ both correlation and path analysis to help them find qualities that may be used as selection criteria to increase crop output. In a number of investigations, earlier researchers measured relationships between yield and yield-attributing characteristics. This study was conducted with the intention of reviewing a few such studies on the correlation and path coefficient analysis of wheat production conducted by other researchers. The number of grains per spike, the length of the spike, the biomass yield, the harvest index, the number of spikes per square metre, the effective tiller, the weight of a thousand grains, the height of the plant, etc. all had a positive direct impact on the yield, whereas the days until flowering, the days until booting, and the days until heading had a positive indirect impact. The maximum negative direct impact shown by chlorophyll concentration on grain yield. The features to be chosen for the hybridization programme should have a direct and positive impact on the yield.