Indian Society of Genetics & Plant Breeding

Screening and identification of new sources of resistance to sheath blight in wild rice accessions

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A total of 218 wild rice accessions including O. rufipogon
and O. nivara were evaluated under artificial inoculation for
resistance to sheath blight disease for two years under
field conditions. The germplasm identified as resistant to
sheath blight were further evaluated through artificial
inoculation for an additional year under glass house
conditions. Based on three years of testing, two Oryza
rufipogon accessions, namely, IC336719 and IC336721 were
identified as resistant to sheath blight disease. In vitro
characterization of resistant genotypes revealed that the
size of sheath blight lesion formation was small along with
comparatively lesser number of infection cushions and
penetration pegs as compared to the susceptible checks.
The O. rufipogon accessions identified in the present study
are very valuable genetic resource, which can be utilized in
the development of introgression lines and mapping QTL(s)
governing resistance to sheath blight of rice.

Keywords: Rice, sheath blight, resistance, Rhizoctonia solani, Oryza rufipogon


Year: 2017
Volume: 77
Issue: 3
Article DOI: 10.5958/0975-6906.2017.00046.3
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Kirti Rawat info_circle
Dhiraj Singh info_circle
S. Gopala Krishnan info_circle
A. K. Singh info_circle
N. K. Singh info_circle
Rashmi Aggarwal info_circle

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