SSRs for Marker-Assisted Selection for Blast Resistance in Rice (Oryza sativa L.)
Rice blast caused by the fungus Magnaporthe oryzae is one of the most devastating diseases of rice in nearly all rice growing areas of the world including Malaysia. To develop cultivars with resistance against different races of M. oryzae, availability of molecular markers along with marker-assisted selection strategies are essential. In this study, 11 polymorphic simple sequence repeat (SSR) markers with good fit of 1:2:1 ratio for single gene model in F2 population derived from the cross of Pongsu seribu 2 (Resistant) and Mahsuri (Susceptible) rice cultivars were analysed in 296 F3 families derived from individual F2 plants to investigate association with Pi gene conferring resistance to M. oryzae pathotype. Parents and progeny were grouped into two phenotypic classes based on their blast reactions. Chi-square test for the segregation of resistance and susceptibility in F3 generation fitted a ratio of approximately 3:1. Association of SSR markers with phenotypic trait in F3 families was identified by statistical analysis. Four SSR markers (RM413, RM5961, RM1233 and RM8225) were significantly associated with blast resistance to pathotype 7.2 of M. oryzae in rice (p ≤ 0.01). These four markers accounted for about 20% of total phenotypic variation. So, these markers were confirmed as suitable markers for use in marker-assisted selection and confirmation of blast resistance genes to develop rice cultivars with durable blast resistance in Malaysian rice breeding programmes.
KeywordsRice (Oryza sativa L.) Rice blast (Magnaporthe oryzae) Simple sequence repeats (SSRs) markers F2 and F3 population Marker-assisted selection Resistance gene
The authors acknowledge technical contributions of Malaysian Nuclear Agency, Molecular Biology Group and Malaysian Rice Research Centre, MARDI, for helpful discussions and greenhouse facilities required for this research.
- Akama Y (1978) Study on rice breeding technology. A report on TARC/MARDI project 1976–78, MalaysiaGoogle Scholar
- Fjellstrom R, Conaway-Bormans CA, McClung AM, Marchetti MA, Shank AR, Park WD (2004b) Development of DNA markers suitable for marker assisted selection of three Pi. Genetics 138:1251–1274Google Scholar
- IRRI (1996) Standard evaluation system for rice, 4th edition. The International Network for Genetic Evaluation of Rice, Genetic Resources Center. International Rice Research Institute, Manila, Philippines, 52 pGoogle Scholar
- Liu SP, Li X, Wang CY, Li XH, He YQ (2003) Improvement of resistance to rice blast in Zhenshan 97 by molecular marker-aided selection. Acta Bot Sin 45:1346–1350Google Scholar
- Mallikarjuna SBP, Sarla N (2010) Meta-analysis of yield QTLS derived from inter-specific crosses of rice reveals consensus regions and candidate genes. Plant Mol Biol Rep doi: 10.1007/s11105-010-0274-1
- McCouch SR, Temnykh S, Lukashova A, Coburn J, DeClerck G, Cartinhour S, Harrington S, Thomson M, Septiningsih E, Semon M, Moncada P, Li J (2001) Microsatellite markers in rice: abundance, diversity, and applications. In: Khush GS, Brar DS, Hardy B (eds) Proceeding of the 4th international rice genetics symposium. Rice genetic IV, IRRI-SPI, pp. 117–135Google Scholar
- Ronald LP, Vasil IK (1994) Mapping population. In: DNA-based markers in plants ed. by PHILIPS RL, VASIL IK, pp.16Google Scholar
- SAS Institute (1989) SAS/STAT user’s guide, version 6, 4th edn., vol 1 and 2. SAS Institute, Raleigh, N. C.Google Scholar
- Sharma RC, Chaudhary NK, Ojha BR, Joshi BK, Pandey MP, Tiwary AK (2005) Genetic diversity and performance of Masuli and its substitute rice cultivars. J Inst Agric Anim Sci 26:21–30Google Scholar
- Swapna M, Sivaraju K, Sharma RK, Singh NK, Mohapatra T (2010) Single-strand conformational polymorphism of EST-SSRs: a potential tool for diversity analysis and varietal identification in Sugarcane. Plant Mol Biol Rep doi: 10.1007/s11105-010-0254-5
- Wang B, Zhu C, Liu X, Wang W, Ding H, Jiang M, Li G, Liu W, Ya F (2010) Fine mapping of qHD4-1, a QTL controlling the heading date, to a 20.7-kb DNA fragment in rice (Oryza sativa L.), Plant Mol Biol Rep doi: 10.1007/s11105-010-0278-x