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Host plant resistance to grain mould in germplasm accessions of pearl millet (Pennisetum glaucum [L.] R. Br.)

OAR@ICRISAT

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Relation http://oar.icrisat.org/2488/
 
Title Host plant resistance to grain mould in germplasm accessions of pearl millet (Pennisetum glaucum [L.] R. Br.)
 
Creator Navi, S S
Tonapi, V A
Varanavasiappan, S
Ravinder Reddy, Ch
 
Subject Millets
 
Description The paucity of information on the moulds in Indian pearl millet (Pennisetum glaucum) led to the studies
that were conducted at ICRISAT, India to evaluate (a) 447 germplasm accessions of 32 countries for
mould reaction in rainy season, (b) threshed grain mould rating (TGMS) and mycoflora on grains of
each accession, and (c) mould scores in field and in vitro. Post physiological maturity evaluation showed
that 16% of the accessions secured a mould rating of 2. In TGMS, 18% were mould free and 57%
secured a rating of 2 on a 1 – 9 scale. Assessment of twenty representative accessions in vitro against
individual and mixed conidial suspensions (1610(6) conidia ml(71)) of Fusarium moniliforme, F.
pallidoroseum and Curvularia pennisetti indicated significant correlation (r¼0.97) between the overall
field and in vitro scores of mixed spores inoculations. The mycoflora for TGMS in blotter test revealed
that Fusarium moniliforme, F. pallidoroseum, Curvularia pennisetti, Helminthosporium spp., Alternaria spp.
and Colletotrichum spp. to be the major fungi affecting pearl millet grain. It is advisable to harvest panicles
at the physiological maturity stage to obtain better quality grains. A strong negative correlation between
TGMS and % GS (r¼0.4601) and positive correlation between TGMS and % UGS (r¼0.4654)
indicated that, the lesser the threshed grain mould rating higher the % seed germination.
 
Publisher Taylor & Francis
 
Date 2006
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/2488/1/Host_plant_resistance_to_grain_mould.pdf
Navi, S S and Tonapi, V A and Varanavasiappan, S and Ravinder Reddy, Ch (2006) Host plant resistance to grain mould in germplasm accessions of pearl millet (Pennisetum glaucum [L.] R. Br.). Archives of Phytopathology and Plant Protection, 39 (6). pp. 465-477. ISSN 0323-5408