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    Response to recurrent selection for resistance to Striga hermonthica (Del.) Benth in a tropical maize population

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    menkir-response-2007.pdf (627.4Kb)
    Date
    2007
    Author
    Menkir, A.
    Kling, J.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Striga hermonthica (Del.) Benth is an obligate root parasite infecting maize (Zea mays L.) and causing considerable yield losses in Africa. Few studies have been conducted to determine the effectiveness of recurrent selection for improving resistance to S. hermonthica in maize. The objective of this study was to evaluate genetic gain achieved in a composite subjected to six cycles of selection under S. hermonthica infestation. The selection cycles and checks were evaluated with and without S. hermonthica infestation at two locations in Nigeria for 2 yr. Selection for improved performance under S. hermonthica infestation significantly increased grain yield by 24% cycle-1 and ears per plant by 9% cycle-1. At the same time, the gain per cycle was −7% for relative yield loss, −5% for host damage rating, −9% for emerged S. hermonthica plants, −4% for anthesis–silking interval, and −5% for ear aspect. Selection under S. hermonthica infestation was accompanied by a concomitant increase in grain yield and improvement in plant aspect and ear aspect without S. hermonthica infestation. The observed progress in performance under S. hermonthica infestation demonstrates the effectiveness of recurrent selection for increasing polygenetic resistance against the parasite in tropical populations.
    http://dx.doi.org/10.2135/cropsci2006.07.0494
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3144
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.2135/cropsci2006.07.0494
    IITA Subjects
    Maize; Genetic Improvement; Grain Legumes; Plant Breeding; Plant Diseases; Disease Control
    Agrovoc Terms
    Striga Hermonthica (Del.) Benth; Maize; Genotypes; Yield; Diseases; Breeding
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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