转GO基因水稻杂交后代对稻瘟病及纹枯病的田间抗性评价

摘要

[Objective] Exploring rice germplasm resources with resistance to rice blast and sheath blight disease was significant for rice breeding and production.[Method] Through three years,the filial generations which translated glucose oxidase gene by natural induction in Shuiwei blast nursery were identified.[Result] (i)The proportions of resistance to rice blast and sheath blight was rare in these hybrids,but the proportion of high susceptible rice blast and middle susceptible sheath blight was higher.(ii)HR332 had both high resistance to rice blast and middle resistance to sheath blight;Both HR333 and HR336 had a middle resistance to rice blast and sheath blight;HR321 had a high resistance to rice blast but a middle susceptible to sheath blight;Both HR337 and HR339 had a resistance to sheath blight but susceptible or high susceptible to rice blast.[Conclusion] These strains could be used in rice blast and sheath blight breeding as new rice germplasm resources.%[目的]发掘新的稻瘟病和纹枯病抗源对于育种和生产上有重要意义.[方法]在水尾病圃对46个已稳定的转GO基因杂交后代进行了3年的田间自然诱发鉴定.[结果]①转GO基因水稻杂交后代株系中,既抗稻瘟病又抗纹枯病的株系很少,高感稻瘟病和中感纹枯病的株系较多.②株系HR332既高抗稻瘟病,又中抗纹枯病;HR333及HR336对稻瘟病和纹枯病均表现为中抗;HR321高抗稻瘟病,中感纹枯病;HR337及HR339抗纹枯病,但感或高感稻瘟病.[结论]这些株系可作为新抗源在抗稻瘟病及纹枯病育种中利用.