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Aline Köhn Carneiro, Adriano Teodoro Bruzi, José Luiz de Andrade Rezende Pereira and Everton Vinicius Zambiazzi

Abstract: To compare agronomic performance and phenotypic stability among
individual soybean lines and a multiline, eight cultivars and a mixture of them
were evaluated in six environments in the 2014/2015 and 2015/2016 crop
seasons. At maturity, grain yield (bg ha-1), lodging score, plant height (cm), and
first pod height (cm) were evaluated. In the 2015/2016 season, the grain oil
and protein content were also evaluated. The GxE interaction was determined
by the ecovalence method. The cultivar V-TOP RR had the highest yield, but it
was also the highest contributor to the GxE interaction, while the multiline was
one of the most stable. The average yield of the multiline did not differ from
the average yield of the lines, i.e., the multiline was stable and high yielding.
For the other traits, there were no differences between the averages of lines
and the multiline by the confidence interval. The mixture of lines is an efficient
strategy to increase phenotypic stability in soybean.

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