Yield and seed size stability analysis of black soybean lines derived from gamma rays irradiation

The development of black soybean superior varieties is still limited despite its importance in Indonesian cuisine. The gamma rays radiation can be utilized to develop new genetic materials derived from the existing cultivar. National black soybean variety Detam 1 was irradiated as the parental line to produce mutant lines for breeding material. This research was performed to identify the stable and superior genotypes from 13 candidate mutant lines tested in eight environments using stability parameters. Three genotypes showed significant superiority compared to wild-type parent, namely G5, G6, and G12 which showed an average yield of 2.99 t/ha, 3.21 t/ha, and 2.95 t/ha respectively. Based on the Finlay-Wilkinson stability test, 8 lines were considered stable yet only 4 can be further satisfied Eberhard-Russel method, namely G2, G5, G6, and G10. In comparison, stability analysis using AMMI suggested different stable lines: G2, G7, and G12. From this list, G12 and G6 also showed a beneficial large-sized seed trait significantly larger than the parent at 18.00 g and 18.96 g per 100 seeds, respectively.