抗白叶枯病水稻不育系先抗A和天抗A的选育  

Breeding of CMS Lines Xiankang A and Tiankang A with Bacterial Blight Resistance in Rice

作　　者：覃宝祥[1] 张月雄[1,2] 杨萌[1] 刘驰[2] 刘芳[1] 马增凤[2] 阳海宁[1] 岑贞陆[2] 邱永福[1] 黄大辉[2] 李容柏[1] 

机构地区：[1]广西大学亚热带农业生物资源保护与利用国家重点实验室/农学院,广西南宁530005 [2]广西壮族自治区农业科学院水稻研究所/微生物研究所,广西南宁530007

出　　处：《杂交水稻》2015年第2期6-9,共4页Hybrid Rice

基　　金：国家"863"计划(2006AA10Z1C5);广西科学研究与技术开发计划(桂科能05112001-1A1;桂科攻1123001-3B;桂科能05112001-1A1);广西大学科研基金项目(XDZ110082)

摘　　要：分别以保持先B和天B为受体和轮回亲本,以携带抗白叶枯病基因Xa23的育种材料P59为供体,通过杂交、回交和分子标记辅助选择,结合农艺性状表现和田间接种抗性鉴定,育成2个含有Xa23基因且抗白叶枯病的保持系先抗B和天抗B,再分别与先A与天A测交、成对回交,育成抗白叶枯病水稻不育系先抗A和天抗A,于2013年9月通过广西科技厅田间技术鉴定。这2个不育系具有败育彻底、农艺性状优良、异交结实率高和抗白叶枯病等特点,配制的杂交稻组合表现出明显的白叶枯病抗性和产量优势,具有较好的应用前景。Developed from the hybridization between the breeding material P59（ as the donor of bacterial blight（ BB） resistance gene Xa23） and maintainer lines Xian B and Tian B（ as the receptor and the recurrent parent in backcrossing）,respectively,followed by successive backcrossing with the molecular marker-assisted selection（ MAS） and inoculated field identification for BB resistance,Xiankang B and Tiankang B were two rice maintainer lines resistant to BB with the gene of Xa23. They were crossed to Xian A and Tian A respectively and transferred into two new BB-resistant rice CMS lines Xiankang A and Tiankang A with the abovementioned method. Xiankang A and Tiankang A were technically identified by the Department of Science and Technology of Guangxi Zhuang Autonomous Region in September,2013. They showed complete and stable male sterility,good agronomic traits,high outcrossing rate and BB resistance. The F1 hybrids of these two CMS lines had a good yield heterosis and BB resistance.

关 键 词：水稻不育系 抗白叶枯病 Xa23基因 先抗A 天抗A 选育 

分 类 号：S511.01[农业科学—作物学] S334