A New Black Soybean Cultivar, “Geomjeongsaeol” with Large Seed, Early Maturity and Lodging Tolerance

A new black seed coated soybean cultivar with yellow cotyledon, Geomjeongsaeol was developed at the Yeongnam Agricultural Research Institute (YARI) in 2004. Geomjeongsaeol was selected from a cross Keunol/ Geomjeongol. The preliminary, advanced, and regional yield trials for evaluation and selection of this line (Milyang 123) were carried out from 1999 to 2004. It has a determinate growth habit, purple flower, tawny pubescence, brown pod color, black seed coat, yellow cotyledon, spherical seed shape, oval leaflet shape, and large seed size (31.1 grams per 100 seeds), and it was 4 days later in maturity than the check variety Geomjeongol. In the seed quality such a crude protein, oligo-saccharide, and anthocyanin contents, Geomjeongsaeol was higher than check variety, and it has good adaptability for cooking with rice. It also has been identified to have resistance to necrotic symptom (SMV-N) of soybean mosaic virus which is the troublesome soybean disease. The average yield of Geomjeongsaeol was 2.34 ton per hectare in the regional yield trials (RYT) carried out for two years from 2003 to 2004 which was 26 percent higher than the check variety Geomjeongol.