A New Corn Hybrid Cultivar, “Gangdaok” for Silage

Abstract

Zea mays L.) developed by themaize breeding team at the National Institute of Crop Science (NICS), RDA in 2005. This hybrid, which has high yields of drymater, total digestible nutrient (TDN) and grain, was derived from crossing two inbred lines, KS140 and KS141. KS140 is theseed parent and KS141 is the pollen parent of Gangdaok. Silking date of Gangdaok is about one day later than that of checka longer ear than a check hybrid, Kwanganok. It has moderately resistance to Bipolaris maydis (southern corn leaf blight), Exse-rohilum turcicum (northern corn leaf blight), and corn borer but sensitivity to black streaked dwarf virus (BSDV). Gangdaok wasevaluated for the yields of dry matter, TDN and grain at four locations from 2003 to 2005. The yields of Gangdaok in dry matter,with those of check hybrid, Kwanganok in dry matter and TDN, and was increased 7% compared with that of check hybrid,Suwon19 in grain yield. Seed production of Gangdaok has gone well due to a god match during crossing between the seed par-ent, KS140 and the pollen parent, KS141 in Yeongwol region.