Greener Journal of Agricultural Sciences

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Bulegeya et al

Greener Journal of Agricultural Sciences

Vol. 11(2), pp. 98-107, 2021

ISSN: 2276-7770

Copyright ©2021, the copyright of this article is retained by the author(s)






The effect of Potyvirus resistance loci from the maize inbred line Oh1VI on development of maize lethal necrosis (MLN)



Victoria B. Bulegeya1*; Mark W. Jones2; Tryphone G. Muhamba3; Biswanath Das4; Peter R. Thomison5;  David M. Francis6; Margaret. G. Redinbaugh7



1-   Tanzania Agriculture Research Institute (TARI) – Dakawa Center, P.O.Box 1892, Morogoro, Tanzania.

2-   United States Department of Agriculture–Agricultural Research Service (USDA-ARS), Corn, Wheat and Soybean Research, Wooster, OH 44691, USA;

3-   Department of Crop Science and Horticulture, Sokoine University of Agriculture (SUA), P.O.Box 3005, Morogoro, Tanzania

4-   International Maize and Wheat Improvement Center (CIMMYT), P.O.Box 1041, Village Market, Nairobi 00621, Kenya

5-   Department of Horticulture and Crop Science, The Ohio State University, 2021 Coffey Rd, Columbus, OH 43210, USA.  

6-   Department of Horticulture and Crop Science, The Ohio State University-Ohio Agriculture Research and Development Center (OARDC), Wooster, OH 44691, USA 

7-   USDA-ARS, Corn, Wheat and Soybean Research, Department of Plant Pathology, The Ohio State University, Wooster, OH 44691, USA.






Article No.: 060421055

Type: Research


Maize lethal necrosis (MLN), a viral disease currently affecting corn in East and Central Africa is caused by a combined infection of Maize chlorotic mottle virus (MCMV) and any maize infecting potyvirus. Most of African maize germplasm is susceptible to the disease and there are no known sources of resistance. Recombinant inbred lines (RIL) derived from Oh1VI, a line known for multi-virus resistance with different QTL for potyvirus resistance on chromosome 3, 6 and 10 were selected and screened against MLN under artificial inoculation and natural infestation. Differences were observed among genotypes and QTL groups at P=0.05 in all experiments except under field inoculation. Genotypes with QTL combination of 3, 6 and 10 had at least 20% reduction in MLN symptoms compared to a susceptible check. These results provide useful baseline information on utilization of potyvirus resistance genes for MLN resistance and control in Sub Saharan Africa.


Accepted:  06/06/2021

Published: 31/07/2021


*Corresponding Author

Victoria Bulegeya

E-mail: victoriabulegeya@



Maize; Maize lethal necrosis (MLN); Potyvirus; Genetic resistance; Sub Saharan Africa




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Cite this Article: Bulegeya VB; Jones MW; Muhamba TG; Das B; Thomison PR;  Francis DM; Redinbaugh MG (2021). The effect of Potyvirus resistance loci from the maize inbred line Oh1VI on development of maize lethal necrosis (MLN). Greener Journal of Agricultural Sciences 11(2): 98-107.



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