摘要
稻瘟病是由子囊菌Magnaporthegrisea(Hebert)Barr[无性世代为Pyriculariagrisea(cooke)Sacc.]引起的广泛发生在我国南北稻区及世界各稻区的主要水稻病害之一,严重阻碍水稻高产与稳产。挖掘和利用广谱稻瘟病抗源,通过基因累加手段将不同抗稻瘟病基因聚集于一体,可延长抗稻瘟病品种应用年限。本研究应用6个稻瘟病菌系四川-1、四川-4、四川-9、四川-31、四川-39和四川-41,对广谱抗性粳稻品种云引F2群体进行田间注射接种,结果表明云引F2群体对所用的6个稻瘟病菌系均表现为3(抗病):1(感病)的分离比例,说明这些抗性均为单显性基因控制。本研究利用Mapmaker3.0/QTL将云引对四川-1菌系的抗稻瘟病基因初步定位在水稻的第11染色体上,云引对四川-4、四川-9、四川-31、四川-39和四川-41的抗稻瘟病基因初步定位在第2染色体上。
Rice blast disease, caused by fungal pathogen Pyricularia grisea Sate., is one of the most serious diseases of rice （Oryza sativa L.） in north-south of China and worldwide. It is one of the major factors that obstacle high yields and stable production in rice. Excavating and utilization of wide blast-resistance rescources, pyramiding different blast-resistance genes into cultivated varieties of rice can prolong blast-resistance times. 6 rice blast disease races, i.e. Sichuan-l.Sichuan-4.Sichuan-9.Sichuan-31.Sichuan-39 and Sichuan-41, were injected into the F2 population of the japan/ca rice Yunyin in the field. The results indicated that blast-resistance genes of japanica variety of Yunyin to the 6 races is controlled by single dominant gene respectively. Moreover, using software Mapmaker 3.0/QTL, the blast-resistant genes to Sichuan-1 was primarily mapped in chromosome 11, the blast-resistant genes to Sichuan-4. Sichuan-9. Sichuan-31 .Sichuan-39 and Sichuan-41 were all primarily mapped in chromosome 2.
出处
《分子植物育种》
CAS
CSCD
2006年第3期359-364,共6页
Molecular Plant Breeding
基金
福建省科技厅重大项目“优质、高产、抗病超级杂交水稻新组合选育”(20022001)
科技部“杂交稻育种创新与应用”(2001BA507A10-09)项目资助.
关键词
粳稻
云引
抗稻瘟病基因
遗传
基因定位
Japanica flee, Yunyin, Blast-resistance genes, Inheritance, Mapping
