Interrelationship among some polygenic traits in hexaploid spring wheat (Triticum aestivum L.)

Sixteen wheat varieties/lines were sown under normal field conditions. Phenotypic and genotypic correlations among various morphological characters were estimated. Direct and indirect effects of these traits on grain yield were determined through path-coefficient analysis. Flag leaf area, grains per spike and tillers per meter length had positive significant genotypic correlation but highly positive significant phenotypic correlation with grain yield whereas spike length, spikelets per spike and spike density exhibited positive significant genotypic and phenotypic correlation with grain yield per meter length. Path- coefficient determined that tillers per meter length and grains per spike are the characters which contribute largely to grain yield.