CORRELATION AND PATH ANALYSIS OF SOYBEAN YIELD COMPONENTS

Abstract

To obtain more productive soybean genotypes, it is essential to know the contribution of each yield component to productivity.Thus, the objective of this work was to identify the relative contribution and correlation through path analysis of yield components in the final yield of soybean genotypes. The study was conducted in 2011/2012, in a greenhouse. The experimental design was a randomized block with six treatments (genotypes) and four repetitions. The genotypes M-SOY 7211 RR, TMG 123 RR , TMG 1176 RR, M-SOY 7908 RR, TMG 127 RR and TMG 7188 RR were used. The number of pods/plant and seeds/plant, 100-seed weight and seed yield/plant were determined. The number of pods/plant showed high and positive correlation with the productivity, while for the 100-seed weight; the correlation was high and negative. Through path analysis, it was observed that the number ofseeds/plant was the component of a more direct effect on the yield, and the effect of the number of pods/plant in the productivity is basedon indirect effect of the number of seed plant.