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| Content Provider | Springer Nature Link |
|---|---|
| Author | Sun, Pingyong Liu, Jinling Wang, Yue Jiang, Nan Wang, Suhua Dai, Yangshuo Gao, Jia Li, Zhiqiang Pan, Sujun Wang, Dan Li, Wei Liu, Xionglun Xiao, Yinghui Liu, Erming Wang, Guo Liang Dai, Liangying |
| Copyright Year | 2012 |
| Abstract | Rice blast, caused by the fungus Magnaporthe oryzae, is the most devastating fungal disease of rice. Mowanggu, a local japonica cultivar in Yunnan Province, China, confers broad-spectrum resistance to this pathogen. To identify the resistance gene(s) in Mowanggu, we obtained an F2 population and 280 F8 recombinant inbred lines (RILs) from a cross between Mowanggu and CO39, a highly susceptible indica cultivar. A linkage map with 145 simple sequence repeat (SSR) and single feature polymorphism markers over 12 chromosomes was constructed using the 280 RILs. The resistance evaluation of the F2 and F8 populations in both the growth chamber and in a natural rice blast nursery showed that a single dominant gene controls blast resistance in Mowanggu. Moreover, nine quantitative trait loci, which were responsible for different partial resistance components, were mapped on chromosomes 2, 3, 6, 8, 9, and 12, making contributions to the phenotypic variation ranging from 3.03 to 6.18 %. The dominant resistance gene, designated Pi49, was mapped on chromosome 11 with genetic distance of 1.01 and 1.89 cM from SSR markers K10 and K134, respectively. The physical distance between K10 and K134 is about 181 kb in the Nipponbare genome. The Pi49 gene accounted for the major phenotypic variation of disease severity in the growth chamber (where plants were inoculated with single blast isolates) and also accounted for most of the phenotypic variance of disease severity, lesion number, diseased leaf area, and lesion size in the blast nursery. Our study not only identified tightly linked markers for introgression of Pi49 into elite rice cultivars via marker-aided selection but also provides a starting point for map-based cloning of the new resistance gene. |
| Starting Page | 45 |
| Ending Page | 54 |
| Page Count | 10 |
| File Format | |
| ISSN | 00142336 |
| Journal | Euphytica |
| Volume Number | 192 |
| Issue Number | 1 |
| e-ISSN | 15735060 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2012-11-18 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Oryza sativa Magnaporthe oryzae Resistance gene Quantitative trait locus (QTL) Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science Horticulture Agronomy and Crop Science |
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