The effect of potyvirus resistance loci from the maize inbred line Oh1VI on development of maize lethal necrosis (MLN)
Loading...
Date
2021-07-31
Journal Title
Journal ISSN
Volume Title
Publisher
Greener Journal of Agricultural Sciences
Abstract
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.
Description
Journal article
Keywords
Maize, Maize lethal necrosis (MLN), Potyvirus, Genetic resistance, Sub Saharan Africa