Relação entre contaminação varietal e classificação por tamanhos em sementes de soja ; Relation among varietal contamination and standardization in soybean seeds

The variety test is held in the laboratory in order to check the number of other cultivars seeds present in a working sample weight equal to purity analysis. The aim of this study was to evaluate the influence of soybean seeds standardization in different size in the result of the variety test using the methodology proposed by Brazilian Rules for Seed Analysis. Soybean seed samples from the cultivars BRSMT Pintado and TMG132RR were used. 400 seeds of each cultivar were treated with red dye to acquire color that stands out from the others. 200 seeds of cultivar BRSMT Pintado were mixed with a sample of the same cultivar while the other 200 samples were mixed with seeds of the cultivar TMG132RR. The process was repeated with the 400 seeds of the cultivar TMG132RR which were mixed with samples of BRSMT Pintado and TMG132RR. After that the samples of the cultivar BRSMT Pintado were separated in sieves 5.5, 6.0, 6.5 and 7.0 while the seeds of the cultivar TMG132RR were classified in sieves 5.0 ,, 5.5, 6.0 and 6.5. After separating the samples from each sieve were subjected to determination of the thousand seeds weight and weight, separating as another cultivar the seeds treated with dye. It was concluded that the soybean variety contamination in standardized seeds varies between different screens in accordance with the size of seed of the cultivar contaminant. The variety test methodology held in number of seeds would be more appropriate than considering the weight of work sample as would be directly related to the amount of other seeded cultivars in a particular area. ; Sem bolsa ; A verificação de outras cultivares por número em laboratório é realizada com o objetivo de verificar o número de outras cultivares presentes em uma amostra de trabalho de peso igual ao da análise de pureza. O objetivo desse trabalho foi avaliar a influência da classificação do lote de sementes de soja em diferentes peneiras, no resultado final da verificação de outras cultivares, utilizando a metodologia proposta pelas Regras para Análise ...