Comparison of Forage Productivity and Outbreak Rate between Corn Varieties in Rice black-streaked Dwarf Virus(RBSDV) Prevalent Area
2013
Choi, K.J., RDA, Cheonan , Republic of Korea | Lim, Y.C., RDA, Cheonan , Republic of Korea | Yoon, S.H., RDA, Cheonan , Republic of Korea | Ji, H.C., RDA, Cheonan , Republic of Korea | Lee, S.H., RDA, Cheonan , Republic of Korea | Jung, M.W., RDA, Cheonan , Republic of Korea | Seo, S., RDA, Cheonan , Republic of Korea | Park, H.S., RDA, Cheonan , Republic of Korea | kim, K.Y., RDA, Cheonan , Republic of Korea
This experiment was carried out to select a resistant corn variety for rice black-streaked dwarf virus (RBSDV) disease in a RBSDV prevalent area (Gochang of Jeollabukdo) from 2006 to 2008. Ten corn varieties for silage preparation were cultivated with first cropping and second cropping system in an RBSDV field, and were tested outbreak rates of RBSDV and dry matter (DM) yield of forage. The outbreak rates of RBSDV were significantly different between corn varieties. Therefore, the resistance degree of corn varieties for RBSDV were divided into 4 groups; very resistant (‘Kwangpeyongok’ and ‘Kwanganok’), resistant (‘P3156’ and ‘P3394’), mildly resistant (‘Cheonganok’ and ‘P32P75’) and susceptible (‘Suwon19’, ‘DK697’ and ‘GW6959’) groups respectively. DM yield of forage in RBSDV fields exhibited comparatively significant differences between varieties (p0.05). DM yield of resistant varieties (‘Kwangpeyongok’, ‘Kwanganok’, ‘P3156’ and ‘P3394’), were higher (14~26%) than those of susceptible varieties (‘Suwon 19’, ‘DK697’ and ‘GW6959’). Therefore, resistant varieties were recommended for increasing forage productivity in field of RBSDV prevalent areas.
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