벼 중생 고품질 내병･내풍성 신품종 ‘동보(東寶)’

Abstract

A new rice variety ‘Dongbo’ is a japonica rice (Oryza sativa L.) with good eating quality, lodging tolerance, and resistance to rice stripe virus (RSV) and blight bacterial disease (BB). It is developed by the rice breeding team of Yeongdeog Substation, National Institute Crop Science, RDA in 2010. This variety derived from a cross between ‘Yeongdeog19’ with good grain quality and wind tolerance and ‘Koshihikari’ with good eating quality conducted in 1996 summer. A promising line,YR18320-21-1-1-2-2-2, selected by pedigree breeding method was designated as the name of ‘Yeongdeog49’ in 2007. After the local adaptability test was carried out at nine locations from 2008 to 2010, ‘Yeongdeog49’ was released as the name of ‘Dongbo’in 2010. ‘Dongbo’ is short culm length as 71cm and medium-growth duration. This variety is resistant to races, K1, K2, and K3of bacterial blight and stripe virus and moderately resistant to leaf blast disease with durable resistance, and also has tolerance to unfavorable environment such as cold and dried wind. ‘Dongbo’ has translucent and clear milled rice kernel without white core and belly rice, and good eating quality as a result of panel test. The yield potential of ‘Dongbo’ in milled rice is about 5.71 MT/ha at ordinary fertilizer level of local adaptability test. This cultivar would be adaptable to middle plain, mid-west costal area, and south mid-mountainous area.