針對稻熱病Pia 及Piz 基因座分子輔助選育秈稻新品系之研究

Abstract

稻熱病會嚴重影響稻榖品質與產量，一直係台灣稻作栽培的重要病害之一。為有效提高新品系抗性，本研究以秈稻高產品種「台中秈17號」為輪迴親，美國稉型稻抗病品種'Zenith'為提供親，利用分子標誌輔助回交法，將'Zenith'所帶抗稻熱病Pia及Piz的allele(對偶基因)導入「台中秈17號」之中，評估最佳抗性組合。 Rice blast is one of severe diseases in Taiwan resulting in the loss of grain yield and quality. In this study, novel breeding lines with a single or two blast resistant genes (R gene) were developed by incorporating blast resistance genes (Pia and Piz) from a japonica donor 'Zenith' into elite indica cultivar 'Taichung Sen 17' ('TCS17') based on marker-assisted backcrossing (MABC) strategy.