文献类型： 外文期刊

作者： Xiao Wu-ming ¹ ; Yang Qi-yun ¹ ; Chen Zhi-qiang ² ; Wang Hui ² ; Guo Tao ² ; Liu Yong-zhu ² ; Zhu Xiao-yuan ¹ ;

作者机构： 1.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangzhou 510640, Guangdong, Peoples R China

2.S China Agr Univ, Coll Agr, Guangzhou 510642, Guangdong, Peoples R China

关键词： blast;space mutation;inheritance analysis;microsatellite DNAs polymorphism

期刊名称：AGRICULTURAL SCIENCES IN CHINA （ 影响因子：0.82； 五年影响因子：0.997 ）

ISSN： 1671-2927

年卷期： 2009 年 8 卷 4 期

页码：

收录情况： SCI

摘要： To understand the resistance inheritance basis of space-induced rice lines to blast, and to probe mutants' genomic DNA polymorphism compared with ground control by microsatellite markers, three space-induced lines were crossed with a highly susceptible variety LTH, and their F(1) and F(2) populations were inoculated by two representative blast isolates with broad pathogenicity to analyze their resistance inheritance basis. Meanwhile three mutant lines and the ground control were analyzed by 225 rice SSR (simple sequence repeat) primer pairs selected throughout the 12 chromosomes of whole rice genome, to scan the mutagenesis in genome of the mutant lines. The results indicated the blast-resistant genes harbored in these mutant lines were dominant. It was demonstrated that the resistance of mutant HI to isolate GD0193 and GD3286 was controlled by a single gene, respectively; while mutants H2 and H3 were controlled by two pairs of major genes against isolate GD3286 and H2 showed complicated genetic mechanism to isolate GD0193. H3's resistance to isolate GD0193 was verified to be controlled by a single gene. According to the results of SSR analysis, three mutant lines showed different mutant rates as compared with the ground control, and the mutant rates also varied. Resistance genes can be induced from rice by space mutation, and different genomic variations were detected in blast-resistant lines.