玉米种质资源抗南方锈病鉴定  

Identification of Resistance to Southern Corn Rust(Puccinia polysora Underw) in Maize Germplasm

作　　者：江凯[1,2] 杜青[3] 秦子惠[2] 陈茂功[2] 李石初[3] 孙素丽[2] 武小菲[2] 郭云燕[2] 石云素[2] 林小虎[1] 王晓鸣[2] 

机构地区：[1]河北科技师范学院,秦皇岛066604 [2]中国农业科学院作物科学研究所/国家农作物基因资源与基因改良国家重大科学工程,北京100081 [3]广西壮族自治区农业科学院玉米研究所,南宁530227

出　　处：《植物遗传资源学报》2013年第4期711-714,共4页Journal of Plant Genetic Resources

基　　金：中央级公益性科研院所基本科研业务费专项(20105);国家现代农业(玉米)产业技术体系(CARS-02)

摘　　要：玉米南方锈病已成为近几年我国夏玉米生产区间歇性暴发流行的病害,对玉米生产构成严重威胁,病害流行年份可造成10%以上的产量损失。目前,已确认的抗病自交系非常有限,而抗病育种急需不同抗性控制背景的自交系。为发掘和丰富可利用的南方锈病抗源,于2008-2012年,在广西南宁采用田间人工接种方法对1589份玉米种质资源进行抗南方锈病鉴定。通过高病害压力和连续多年的鉴定,从1589份玉米种质中鉴定出高抗(HR)材料26份,占鉴定总数的1.64%;抗病(R)材料137份,占鉴定总数的8.62%;中抗(MR)水平的材料382份,占鉴定总数的24.04%;感病(S)材料489份,占鉴定总数的30.77%;高感(HS)材料555份,占鉴定总数的34.93%。总体上抗南方锈病种质较少,引进种质中抗病类型材料的比例略高。经重复鉴定,筛选出赤556等18份自交系、老来秕等3份地方品种、A69等4份来自津巴布韦的材料及引自CIMMYT的Dr11表现稳定高抗南方锈病,为今后我国玉米抗南方锈病育种提供了新的抗性资源。Southern corn rust（SCR） is a destructive disease in the summer maize area and causes more than 10% yield loss in disease epidemic years.Few SCR-resistance lines are known and the deficiency in inbred lines with different SCR-resistance genes are evident in breeding.For finding and utilizing the new SCR-resistance germplasm screening of 1589 accessions to SCR was carried out by inoculation in the fields during 2008-2012 in Nanning,Guangxi.The results showed that 26 accessions were highly resistant,accounting for 1.64%,137 accessions were resistant,accounting for 8.62%,382 were moderately resistant,accounting for 24.04%,489 were susceptible,accounting for 30.77%,555 were highly susceptible,allounting for 34.93%.There were more resistant type lines（HR,R,and MR） in imported maize germplasm.By re-screening 26 accessions,including 18 inbred lines,3 landraces,4 Zimbabwe lines,and Dr11 from CIMMYT were confirmed with highly resistance to southern corn rust that would provide new SCR-resistance source for breeding in China.

关 键 词：玉米 种质资源 南方锈病 抗性 

分 类 号：S513[农业科学—作物学]