Resumen

MEIER, Carine et al. Agronomic performance and linear correlation between yield traits in second-harvest soybean. Rev. de Ciências Agrárias [online]. 2019, vol.42, n.4, pp.71-80. ISSN 0871-018X.  https://doi.org/10.19084/rca.17995.

The soybean is the main summer crop in Brazil, currently the cultivation of the second crop has been growing. In this sense, the acknowledgement of traits contribution to grain yield in front of these conditions is necessary. The experimental design was in a randomized block, in 2 x 8 factorial scheme, two locals (Salvador das Missões - RS and Tenente Portela - RS) and eight soybean genotypes with indeterminate habit (BMX Elite, NS 5959, NS 5909, BMX Alvo, BMX Potência, BMX Tornado, BMX Turbo, BMX Garra). Data were submited to analysis of variance by the F test (p <0.05), and after the path analysis was performed from the correlation matrix, considering total grain mass as the dependent variable, and the other agronomic traits as explanatory variables. The grain yield components, number of pods with three grains, thousand grain weight of pods with three grains showed stronger and more positive linear trends with grain yield. The genotypes NS5959, BMX Potência and BMX Turbo obtained the highest total grain mass, and that had more contribution of the thousand grain weight of pods with two and three grains.

Palabras clave : Path analysis; Grain yield components; Glycine max.

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