A New Black Soybean Cultivar, “Cheongja 3” with Green Cotyledon, Medium-late Maturity and High Anthocyanin

A new black seed coated soybean cultivar with green cotyledon, Cheongja 3 was developed at the National Institute of Crop Science (NICS), and Yeongnam Agricultural Research Institute (YARI) in 2004. Cheongja 3 was selected from a cross Suwon 174/Mokpo 17. The preliminary, advanced, and regional yield trials for evaluation and selection of this line (Milyang 136) were carried out from 2000 to 2004. It has a determinate growth habit, purple flower, tawny pubescence, dark brown pod color, black seed coat, green cotyledon, ellipse seed shape, oval leaflet shape and large seed size (32.1 grams per 100 seeds), and it was 7 days later in maturity than the check variety Cheongja. In seed quality such a sucrose, and a total sugar contents, isoflavone, and anthocyanin contents, Cheongja 3 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 Cheongja 3 was 2.40 ton per hectare in the regional yield trials (RYT) carried out for three years from 2002 to 2004 which was 12 percent higher than the check variety Cheongja.