摘要
光温敏不育系是杂交水稻育种的宝贵资源,以新发现的水稻光温敏不育系19XS为材料,对其育种过程、农艺性状、育性转换特性、杂交后代育性及基因型进行分析。结果表明,在武汉地区(5月初播种),19XS从8月初抽穗到9月底保持稳定不育状态,约45 d以上;10月3日后开始出现少量育性转换。19XS在海南地区(11月下旬播种,3月初抽穗)通常表现为可育,具有光温敏育性转换特征。遗传分析表明,19XS是一个新的隐性不育系,其不育性不受遗传背景干扰。19XS与香78S杂交后代(19XS/香78S)表现出优良的农艺性状,包括株型紧凑、穗大粒多以及结实率高等。基因芯片检测结果显示,19XS和19XS/香78S均含有温敏雄性不育基因TMS5。研究结果为杂交水稻育种提供了新的材料基础。
Photo-thermo-sensitive genic male sterile(P/TGMS)lines are precious resources for hybrid rice breeding.Using the newly discovered rice P/TGMS line 19XS as material,its breeding process,agronomic traits,fertility conversion characteristics,hybrid progeny fertility,and genotype were analyzed.The results showed that in Wuhan area(sown in early May),19XS maintained a stable sterile state for more than 45 days from heading in early August to late September;a small amount of fertility conversion began to occur after October 3.In Hainan area(sown in late November,heading in early March),19XS generally appeared fertile,exhibiting photothermo-sensitive fertility conversion characteristics.Genetic analysis indicated that 19XS is a new recessive genic male sterile line,and its sterility is not interfered with by the genetic background.The hybrid progeny of 19XS and Xiang 78S(19XS/Xiang 78S)exhibited excellent agronomic traits,including compact plant type,large panicles with numerous grains,and high seed setting rate.Gene chip detection results showed that both 19XS and 19XS/Xiang 78S contain the thermo-sensitive male sterile gene TMS5.These findings provide a new material basis for hybrid rice breeding.
作者
闸雯俊
李行润
周发松
冯芳
吴边
陈俊孝
石少阶
周雷
王静
游艾青
Zha Wenjun;Li Xingrun;Zhou Fasong;Feng Fang;Wu Bian;Chen Junxiao;Shi Shaojie;Zhou Lei;Wang Jing;You Aiqing(Institute of Food Crops,Hubei Academy of Agricultural Sciences/Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement,Wuhan 430064,Hubei,China;Wuhan Shuanglüyuan Chuangxin Technology Research Institute Co.,Ltd.,Wuhan 430050,Hubei,China;Hubei Hongshan Laboratory,Wuhan 430070,Hubei,China)
出处
《作物杂志》
北大核心
2026年第1期9-14,共6页
Crops
基金
湖北省重点研发计划项目(2023BBB031)
湖北省科技重大专项(2022ABA001)。
关键词
水稻
光温敏不育系
19XS
育性转换
基因型分析
Rice
Photo-thermo-sensitive genic male sterile line
19XS
Fertility conversion
Genotype analysis
