Genetic dissimilarity between soybean genotypes Screening of soybean genotypes using seeds physiological attributes through multivariate analysis

• DOI: https://doi.org/10.22533/at.ed.4482408074

• Palavras-chave: Glycine max, desempenho de plântulas, vigor de sementes, medidas de dissimilaridades

• Keywords: Glycine max, seedling performance, seed vigor, dissimilarities measures.

• Abstract: Soybean genotypes capable of producing seeds with high physiological performance constitute a strategy to enhance the use of environmental resources towards increasing crop sustainability. The objective of this study was to estimate the genetic dissimilarity between soybean genotypes, aiming to identify superior genotypes to act as possible progenitors in breeding programs. Fourteen soybean genotypes were evaluated by germination and seed vigor tests. The data were submitted to univariate statistical analysis. Multivariate statistical analyses were performed, such as the UPGMA hierarchical grouping method and canonical variables. The length of the shoot allowed the greatest discrimination between genotypes; and the characteristics that contributed to the dissimilarities were: normal seedlings (51.72%), abnormal seedlings (24.24%), dead seeds (11.29%) and accelerated aging (6.61%). It was concluded that the three genotypes isolated in groups II, IV and V were also the most genetically divergent and presented superior performance. The SW ATRIA RR genotype was considered the most promising.