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Development of a Field Screening Technique and Identification of Blast Resistance in Finger Millet Core Collection

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Relation http://oar.icrisat.org/6092/
http://www.indianjournals.com/ijor.aspX?target=ijor:ijpp1&volume=40&issue=1&article=009
 
Title Development of a Field Screening Technique and Identification of Blast Resistance in Finger Millet Core Collection
 
Creator Kiran Babu, T
Thakur, R P
Reddy, R P
Upadhyaya, H D
Girish, A G
Sarma, N D R K
 
Subject Millets
 
Description Effective management of blast disease in finger millet can best be achieved through host-plant resistance. In this study, field screening technique was developed and core collection evaluated to identify sources of resistance to blast. The field screening technique involved: use of systematic susceptible checks after every four test rows, artificial spray inoculation at pre-flowering stage with an aqueous conidial suspension (1×105 spores ml−1) of Magnaporthe grisea fm strain multiplied on oatmeal agar medium at 27±1ºC for 10 days, and maintaining high humidity and leaf wetness through sprinkler irrigation twice a day for 4 weeks following inoculation. Neck blast was recorded on a 1–5 scale and finger blast as severity percentage on all the tillers of selected 10 plants in a row at physiological maturity. The finger millet core collection consisting of 622 accessions was evaluated for neck and finger blast resistance. Among the core collection, 402 accessions were found resistant to neck blast, 436 to finger blast and 372 had combined resistance to both the diseases. Blast resistant accessions belonged to one wild and four cultivated races of finger millet that originated from 19 countries indicating the wide geographical diversity among resistant accessions. Most of the accessions from Asian origin were susceptible to neck and finger blasts while, those from African origin were resistant. A significant strong positive correlation (r = 0.85, P
 
Publisher Plant Protection Association of India
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6092/1/IJPP_40_1_45-51_2012.pdf
Kiran Babu, T and Thakur, R P and Reddy, R P and Upadhyaya, H D and Girish, A G and Sarma, N D R K (2012) Development of a Field Screening Technique and Identification of Blast Resistance in Finger Millet Core Collection. Indian Journal of Plant Protection, 40 (1). pp. 45-51. ISSN 0253-4355