Competition of soybean genotypes cultivated in lowlands of rio grande do sul, Brazil

The objective of this study was to infer on yield performance through linear associations of traits and identify the genetic variation of soybean genotypes through canonical variables. The experiment was carried out during the 2013/2014 agricultural year in a randomized block design arranged in four replications. The following genotypes were utilized: NS 5445 IPRO, NS 6211 RR, TEC 6029 IPRO, TECS 13/03 RR, 6458 RSF IPRO, DON MARIO 5.8i, 6160RSF IPRO, DON MARIO 5.9i, CD 2611 IPRO, CD 2585 RR, and TMG 7161 RR. Genotypes 6160RSF IPRO, NS 5445 IPRO, and 6458RSF IPRO presented the greatest grain yield values, demonstrating potential use for cultivation in lowlands in Rio Grande do Sul. The traits grain weight of ten plants, number of pods in the main stem, number of pods in the branches, number of pods with one, two, and three grains have positive linear correlations with grain yield. The genotypes were clustered according to their genetic basis and maturation cycle, canonical variables explained 85.05% of existent genetic variation, and four genotype groups were formed.