Identification of soybean genotypes resistant to stink bug complex and key agronomic traits for selection

The stink bug complex is characterized as an important soybean pest that demands the development of cultivars resistant to the attack of these insects to reduce losses in soybean quality and productivity and, therefore, develop a more sustainable agriculture. This study aimed at selecting soybean genotypes with good agronomic traits, including resistance to stink bug complex and identify the key traits that assist in this selection. 256 genotypes obtained by crossing IAC-100 (resistant) × CD-215 (susceptible) were evaluated under natural field infestation, in the 2014/15 harvest using the16x16alpha-lattice design. The multivariate statistical analysis of principal components and non-hierarchical K-means clustering method tested 11 agronomic traits of interest. The genotypes selected for resistance to stink bugs complex were IAC 100, 2, 18, 22, 25, 38, 48, 69, 71, 73, 110, 121, 132, 133, 149, 150, 171, 178, 181, 202, 214, 217, 219, 241 and 242. The studied traits as yield, good seed weight, leaf retention, and 100 seed weight can be used to select resistant genotypes.