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Euphytica

, Volume 163, Issue 2, pp 275–282 | Cite as

Development and validation of microsatellite markers linked to the rice blast resistance gene Pi-z of Fukunishiki and Zenith

  • R. Rathour
  • Mohit Chopra
  • T. R. Sharma
Article

Abstract

Rice blast resistance gene ‘Pi-z’ present in rice genotypes, Zenith and Fukunishiki, represents a potential source of blast resistance for the north-western Himalayan region of India. We tested the reliability of microsatellite markers linked to Pi-z for assessing blast resistance phenotype in crosses of commercial importance. A new set of microsatellite markers linked to Pi-z was also developed by exploiting the publicly available marker and genomic resources of rice. Of the three previously reported markers for Pi-z, only MRG5836 was suitable for the marker assisted selection of Pi-z. Among the 17 microsatellites selected from the putative region of Pi-z locus, two, RM8225 and RM8226 cosegregated with MRG5836 and were located at distance of 1.2–4.5 cM from the gene. A new microsatellite marker ‘SSR236’ was developed from the (CT)16 repeat of PAC clone P0502B12, which exhibited closer linkage (0.6–1.2 cM) to Pi-z. Survey of the allelic diversity at the loci of the Pi-z linked microsatellite markers revealed that the Fukunishiki and Zenith type alleles were not present in majority of the local indica rice genotypes. As these markers are polymorphic between the Pi-z donors and a great majority of local indica rices tested, they can be used as a selection tool in rice breeding programs aimed at improving the blast resistance of local rices.

Keywords

Microsatellite markers Pi-z gene Resistance Rice blast 

Notes

Acknowledgements

The authors wish to thank the Program Director, Advanced Centre of Hill Bioresources and Biotechnology, H.P. Agricultural University, Palampur for providing all the necessary facilities for this work. The Financial assistance received from the Department of Biotechnology, Govt. of India is also duly acknowledged.

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Advanced Centre of Hill Bioresources and BiotechnologyH.P. Agricultural UniversityPalampurIndia

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