Wheat and soybean seed sector is one important branche of Rio Grande do Sul
State agribusiness, Brazil. However, there are few studies towards market analysis and, when
present, they don,t consider the seed company peculiarities. To fullfill this lacune, one study was
accomplished with the objective of elaborate a diagnostic of the seed sector, centering the analysis
on how seed companies act. This study used secondary data, in wich inputs and outputs of the
seeds companies were analyzed. The institutional relationship of these companies and genetic
breeding programs was treated as inputs. Their performance in scale, management, new varieties
and destiny of their sales, among other, were considered outputs. Multivariate techniques of analysis
were used. To identify groups by performance on the outputs, clusters analysis was accomplished
for correspondence analysis with the inputs. The study showed that seed companies with small
and very small production scale, up to 460 and 955 tons for wheat and soybean, respectively, are
majority in the Rio Grande do Sul State. Those companies without institutional relationship and
genetic breeding programs, presented also the worst performance in scale, innovation and
segmentation.