A maize inbred line “Euisung” resistant to black streaked dwarf virus

The black strecked dwarf virus(BSDV) is one of the most destructive maize virus diseases in southern part of Korea. As one measure to counterattack the disease, a breeding program was initiated in 1979 at the Chungnam National University in cooperation with the Crop Experiment Station, Rural Development Administration. The breeding materials used were all collected from Korean local areas. After a series of breeding efforts, an inbred line, Euisung, was developed and screened out as a resistant line from field screening tests conducted at two locations in 1986. The Euisung inbred line had no apparent disease symptoms throughout the growth period, while susceptible lines were all stunted during early stage of growth. The genetic nature of the disease resistance in the line is not known yet, but the the Euisung line may have a great breeding potential for developing disease resistant hybrieds in Korea.