Chemical composition of grains and environmental efficiency in soybeans grown under low latitude conditions


  • Douglas José Daronch Instituto Federal do Tocantins
  • Joênes Mucci Peluzio Universidade Federal do Tocantins
  • Flavio Sergio Afferri Universidade Federal de São Carlos
  • Aline Torquato Tavares Universidade Federal do Tocantins
  • Clovis Maurílio de Souza Universidade Federal do Tocantins



Soybeans are one of the main commodities in Brazil, with soybean oil and meal used as raw material for food and animal feed production. However, information on the chemical characteristics of soybeans produced at different times of the year and on the efficiency of genotypes under low latitude conditions is scarce. This study evaluates the environmental efficiency of soybean genotypes based on oil and protein contents during in-season and off-season periods, in Tocantins State. The experimental design was a randomized block with seventeen treatments (genotypes) and three replicates. The treatments were composed by cultivars TMG 1288 RR; AS 3810 IPRO; CD 2792 RR; CD 251RR; CD 2737RR; SHS 820 IPRO; TMG 1180 RR; M 8766 RR; P 98Y70RR; M 9144 RR and strains 5X6-1; 5X6-2; 5X6-3; 4X6-12; 4X6-17; 4X6-19 and 4X5-2. There was effect of sowing times on the oil and protein contents of the grains. Genotype TMG 1288 RR presented the highest levels of oil and protein. The best sowing time for protein content was the first of the in-season (12/01). For oil content, in turn, the off-season stood out (06/01), evidencing that early sowing resulted in better results. Since the contents of these two elements are inversely proportional, one must verify the desired purpose to choose the material to be used. The identification of superior genotypes by the proposed index was effective only for unfavorable environments.

Biografia do Autor

Douglas José Daronch, Instituto Federal do Tocantins

Professor do Instituto Federal do Tocantins

Departamento de Agronomia


Joênes Mucci Peluzio, Universidade Federal do Tocantins

Professor Associado III na Universidade Federal do Tocantins

Departamento de Agronomia

Área: Melhoramento de Plantas

Flavio Sergio Afferri, Universidade Federal de São Carlos

Professor Associado III da Universidade Federal de São Carlos

Departamento de Agronomia

Aline Torquato Tavares, Universidade Federal do Tocantins

Pós-doutoranda do Programa de Produção Vegetal

Departamento de Agronomia

Área: Melhoramento de Plantas

Clovis Maurílio de Souza, Universidade Federal do Tocantins

Professor da Universidade Federal do Tocantins

Departamento de Agronomia

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