Yield of soybean genotypes identified through GGE biplot and path analysis

PLoS One. 2022 Oct 12;17(10):e0274726. doi: 10.1371/journal.pone.0274726. eCollection 2022.

Abstract

Genotype × environment (G×E) interaction is an important source of variation in soybean yield, which can significantly influence selection in breeding programs. This study aimed to select superior soybean genotypes for performance and yield stability, from data from multi-environment trials (METs), through GGE biplot analysis that combines the main effects of the genotype (G) plus the genotype-by-environment (G×E) interaction. As well as, through path analysis, determine the direct and indirect influences of yield components on soybean grain yield, as a genotype selection strategy. Eight soybean genotypes from the breeding program of Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) were evaluated in field trials using a randomized block experimental design, in an 8 x 8 factorial scheme with four replications in eight different environments of the Cerrado of Northeastern Brazil during two crop seasons. Phenotypic performance data were measured for the number of days to flowering (NDF), height of first pod insertion (HPI), final plant height (FPH), number of days to maturity (NDM), mass of 100 grains (M100) and grain yield (GY). The results revealed that the variance due to genotype, environment, and G×E interaction was highly significant (P < 0.001) for all traits. The ST820RR, BRS 333RR, BRS SambaíbaRR, M9144RR and M9056RR genotypes exhibited the greatest GY stability in the environments studied. However, only the BRS 333RR genotype, followed by the M9144RR, was able to combine good productive performance with high yield stability. The study also revealed that the HPI and the NDM are traits that should be prioritized in the selection of soybean genotypes due to the direct and indirect effects on the GY.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Edible Grain / genetics
  • Genotype
  • Glycine max* / genetics
  • Phenotype
  • Plant Breeding* / methods

Grants and funding

This study was financed in part by King Saud University, Ri-yadh, Saudi Arabia under Researchers Support Project number (RSP-2021/219) awarded to MKO, AAH, and HA, and by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001 with one awarded for author WJSS. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.