CAUSE AND EFFECT RATIO OF GRAIN CHEMICAL COMPONENTS ON SOYBEAN YIELD

摘要

The chemical composition of the grain is strongly influenced by genetic and environmental effects, so studies involving correlations and analyses can be useful in breeding programs. Therefore, the present work was carried out aiming at the study of cause and effect and correlation of chemical composition on grain yield, in eight trials represented by the combination of crops (years)/sites/sowing times, four of which were carried out in the 2014/15 crop and four in the 2015/16 crop. The experimental design used in each assay was randomized blocks with three replications and eight treatments, represented by the cultivars: 8473RSF RR, 8576 RSF, 8579RSF IPRO, ST 820 RR, TMG 132 RR, 9086RSF IPRO, M8644 IPRO, and M9144 RR. The chemical characteristics of the grains evaluated were; oil content, protein, carbohydrates, neutral digestive fiber - Fdn and acid digestive fiber - FDA. Variance analysis of each crop (year) and sowing time was performed and, subsequently, track and correlation analyses were performed to quantify the contribution and relationship of each chemical component of the grain over the final yield. The time and year influenced the magnitude of the correlations and the direct and indirect effects on grain yield.