分子标记辅助选择定向改良不育系Q211S稻瘟病的抗性  

Directed Improvement of Rice Blast Resistance of Sterile Line Q211S with Molecular Marker-Assisted Selection

作　　者：黄艳玲[1] 严志[1] 王慧[1] 申广勒[1] 张从合 Huang Yanling;Yan Zhi;Wang Hui;Shen Guangle;Zhang Conghe(Anhui Win-All Hi-Tech Seed Co.,Ltd./Key Lab for New Variety Development of Hybrid Rice of Ministry of Agriculture,Hefei 23008)

机构地区：[1]安徽荃银高科种业股份有限公司/农业部杂交水稻新品种创制重点实验室,合肥230088

出　　处：《中国农学通报》2018年第24期135-140,共6页Chinese Agricultural Science Bulletin

基　　金：国家科技支撑计划项目"主要农作物商业化育种技术研究与模式示范"(2014BAD01B00)

摘　　要：为提高水稻温敏型核不育系‘Q211S’的稻瘟病抗性,以‘Q211S’为受体材料,以携带Pi9基因的抗稻瘟病材料‘75-1-127’为供体,通过常规育种方法和分子标记辅助选择技术相结合,选育出5个抗病性改良的两系不育系。抗性鉴定及田间试验结果表明:这5个抗病性改良的两系不育系对苗瘟、穗瘟均表现较高抗性,其他特征特性与‘Q211S’相近。5个改良不育系与‘Q211S’所配组合在株高、每穗总粒数、结实率、千粒重上差异不显著;而改良不育系所配组合在稻瘟病抗性方面较‘Q211S’所配组合明显增强。To improve the rice blast resistance of thermo-sensitive genic male sterile line‘Q211 S＇, the thermo-sensitive genic male sterile line‘Q211 S＇was used as the receptor parent and the‘75-1-127＇with excellent rice blast resistance, carrying gene Pi9, was used as donor parent, five improved two-line male sterilelines with rice blast resistance were bred by using conventional breeding and molecular marker-assistedselection. Resistance identification and field trials demonstrated that the five improved two-line male sterilelines performed higher resistance to rice leaf blast and panicle neck blast, the other agronomic characters werealmost identical to that of‘Q211 S＇. Furthermore, the new hybrid rice combinations which the five improvedtwo-line male sterile line rice were used as female parents had no significant differences in plant height,spikelet number per panicle, setting rate and 1000-grain weight compared with that of‘Q211 S＇used asfemale parent, whereas the rice blast resistances of the new hybrid rice combinations which the five improved two-line male sterile line rice were used as female parents, were obviously enhanced.

关 键 词：水稻 分子标记辅助选择 稻瘟病 Pi9基因 不育系 Q211S 

分 类 号：S511[农业科学—作物学]