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Evaluation of wild and weedy sorghums for downy mildew resistance

OAR@ICRISAT

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Relation http://oar.icrisat.org/4851/
 
Title Evaluation of wild and weedy sorghums for downy mildew resistance
 
Creator Karunakar, R I
Narayana, Y D
Pande, S
Mughogho, L K
Singh, S D
 
Subject Sorghum
 
Description Downy mildew of sorghum [Peronosclerospora sorghi (Weston & Uppal) C.G. Shaw], is one of the widespread diseases of sorghum [Sorghum bicolor (L.) Moench] (Williams 1984). Systemically infected plants fail to produce panicles, resulting in complete loss of grain yield (Craig and Odvody 1985). Sources of resistance to this disease have been reported in wild sorghums (Mughogho et al. 1982). In an attempt to identify additional sources of resistance, we screened 308 wild and weedy sorghums belonging to 29 species and sub-species in greenhouse conditions at ICRISAT Asia Center (IAC) during 1990-91. Seeds of each accession, supplied by ICRISAT's Genetic Resource Division, were sown in two 12-cm square pots. Seedlings at the coleoptile-to-one-leaf stage were spray-inoculated with conidia (6xl05 conidia mL_1) as described by Reddy et al. (1992). The IAC isolate of the pathogen was used. Downy mildew incidence was recorded three weeks after the inoculation.
 
Publisher International Crops Research Institute for the Semi-Arid Tropics
 
Date 1994
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/4851/1/Evaluation%20of%20wild%20and%20weedy%20sorghums%20for%20downy%20mildew%20resistance.pdf
Karunakar, R I and Narayana, Y D and Pande, S and Mughogho, L K and Singh, S D (1994) Evaluation of wild and weedy sorghums for downy mildew resistance. International Sorghum and Millets Newsletter, 35. pp. 104-106. ISSN 1023-487X