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Resistance to blast (Magnaporthe grisea) in a mini-core collection of finger millet germplasm

OAR@ICRISAT

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Relation http://oar.icrisat.org/6144/
http://dx.doi.org/10.1007/s10658-012-0086-2
 
Title Resistance to blast (Magnaporthe grisea) in a mini-core collection of finger millet germplasm
 
Creator Kiran Babu, T
Thakur, R P
Upadhyaya, H D
Reddy, P N
Sharma, R
Girish, A G
Sarma, N D R K
 
Subject Millets
Genetics and Genomics
 
Description Blast caused by Pyricularia grisea [teleomorph: Magnaporthe grisea] is an economically important and widespread disease of finger millet in the world. Host resistance is the most economical and effective means of combating this disease as finger millet is predominantly grown by resource-poor and marginal farmers. At the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), we evaluated a finger millet mini-core collection of 80 germplasm accessions (about 1 % of the total germplasm collection representing major trait variability) for blast resistance both in the field and greenhouse. Field evaluation was done using a refined screening technique that included new improved rating scales for leaf, neck and finger infection. Sixty six of the 80 accessions showed combined resistance to leaf, neck and finger blast in two seasons (2009 and 2010) of field screening. A highly significant and positive correlation was found between neck and finger blast ratings (r = 0.92), whereas small but significant correlations were found between leaf blast and neck blast (r = 0.25) and between leaf blast and finger blast (r = 0.30). These accessions were also screened for leaf blast resistance in the greenhouse by artificial inoculation of seedlings to confirm field observations. Fifty-eight of the 80 accessions were resistant to leaf blast in the greenhouse screen as well. These resistant accessions represented one wild (africana) and four cultivated races (vulgaris, plana, elongate and compacta) of finger millet that originated from 13 countries in Asia and Africa and exhibited considerable diversity for agronomic traits, such as maturity period, plant height and panicle type. These blast resistant accessions from the mini-core collection would be useful in finger millet disease resistance breeding programs.
 
Publisher Kluwer
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
application/pdf
 
Language en
en
 
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Identifier http://oar.icrisat.org/6144/2/Kiranbabu_etal_2012.pdf
http://oar.icrisat.org/6144/9/EJPP_135_299%E2%80%93311_2013.pdf
Kiran Babu, T and Thakur, R P and Upadhyaya, H D and Reddy, P N and Sharma, R and Girish, A G and Sarma, N D R K (2013) Resistance to blast (Magnaporthe grisea) in a mini-core collection of finger millet germplasm. European Journal of Plant Pathology, 135 (2). pp. 299-311. ISSN 1573-8469