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  • Maize: Tar Spot Disease Complex tolerant Semi-Inbred Lines
  • Maize Tar Spot Disease Complex Tolerant Semi-Inbred Lines

    Early generation lines developed through backcross breeding which have demonstrated useful levels of Tar Spot Disease Complex (TSDC) tolerance. Disease tolerance is evaluated beginning prior to flowering and through mature stages of plant growth. Landrace accessions identified through phenotypic evaluation to have useful levels of disease tolerance were used as donors. Several elite CIMMYT Maize Lines (CMLs), selected with input from line and hybrid development breeders, were used as recurrent parents.

    Product details and features:


    1. Semi-inbred lines of lowland tropical and sub-tropical adaptation separated into “Tuxpeño” and “non Tuxpeño” heterotic groupings
    2. Semi-inbred lines developed using recent and breeder-preferred CMLs
    3. Semi-inbred lines have >5% yield advantage under TSDC infestation relative to genetic and key disease-tolerant checks, and have yield within ±10% of elite check under non-stressed conditions
    4. Summary of Best Landraces for TSC
      (PDF File – 72 KB )

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    1. Donor accession and recurrent parent line data, including passport, geographical information system (GIS)-derived, pedigree, phenotype and genotype available in searchable format through Germinate (http://germinate.cimmyt.org/) starting January 2018.


    Primary Users

    Maize breeders for whom TSDC tolerance is a crucial priority trait; maize breeders and geneticists investigating physiological and molecular basis of disease tolerance; researchers and students engaged in gene discovery for disease tolerance.



    These are improved materials suited for use in small to large research or breeding programs interested in exploring and using exotic TSDC tolerant donor sources.


    Available November 2017
    50 seeds of each line available per request

    For more information

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