Assessment of agronomic performance and shattering resistance of F7 soybean lines

Soybean productivity can be increased through optimizing the agronomic performance and minimizing the yield losses due to pod shattering. The objectives of this studywere to evaluate the agronomic performance and shattering resistance of F7 soybean lines. Twenty-one F7 lines including three check varieties (Dega 1, Detap 1, and Anjasmoro) were evaluated in two soybean production centers (Blitar and Mojokerto, East Java, Indonesia) from July to October 2018. The field experiment was arranged in a randomized block design with four replications. The screening for shattering resistance was done by the oven-dry method. The results showed that the plant height, number of filled pods, seed size, and seed yield were higher in Mojokerto than in Blitar, meanwhile, the average branches number in Blitar was higher than in Mojokerto. The yield of Detap 1 (2.89 t/ha) was highest than the two other check varieties. Three lines produce higher yield than Detap 1, namely Anjs/G100H-44 (3.33 t/ha), Anjs/Rajabasa-306 (3.22 t/ha), and Anjs/Rajabasa-311 (3.26 t/ha). The agronomic traits for determining high yields differ between locations. The assessment for shattering resistance resulted in seven highly resistant lines, twelve resistant lines, three moderately resistant lines, one susceptible line, and one highly susceptible line. Three selected lines with high yield and resistant to pod shattering were recommended to be tested in the various environments.