Indian Society of Genetics & Plant Breeding

Mining for major blast resistance genes in rice landraces of Karnataka

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Rice blast caused by Magnaporthe oryzae is the most
devastating disease. Host-plant resistance is one of the
important approaches to tackle this disease. India being
the center of origin of rice, shelters numerous landraces
adopted to overcome biotic and abiotic stresses. Three
well characterized blast resistance genes, Pi1, Pi2 (Piz-5)
and Pi5 were mined from rice landrace collection from
Karnataka state, India by using gene linked and gene based
molecular markers. Landraces were field screened for blast
resistance. Pi1 gene was tracked in 39 landraces accounting
46.98% gene frequency. Sixty landraces contained Pi2 and
Pi5 gene with 72.28% gene frequency. Twenty landrace
harboured all the three genes.

Keywords: Rice, blast, gene mining, landraces, resistance


Year: 2014
Volume: 74
Issue: 3
Article DOI: 10.5958/0975-6906.2014.00857.8
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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