• Test Workshop


    • 400x400

    These are germplasm bank landrace accessions that are promising for use in research and pre-breeding for drought tolerance at flowering and grain fill stages of the crop life cycle. They have been identified based on analysis of geographical information system (GIS) descriptors and associated climatic data for their location of origin. Adaptation-based, e.g. lowland tropical or highland, panels have been developed comprising 500, 250, 100 and 50 landrace accessions. These panels maximize and maintain representativeness of the genomic diversity of the broader landrace collection of interest.

    Primary User(s)

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


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    Product details and features

    1. Accession panels identified with descriptors (BankAccNo and GID) required for online ordering
    2. All accessions available for distribution from the CIMMYT Germplasm Bank
    3. Passport and GIS-derived data for accessions available in flat file and searchable format through Germinate (http://germinate.seedsofdiscovery.org/)
    4. Any available phenotypic data for the accessions available through Germinate
    5. Genotypic data for accessions available through Germinate
    6. Genotypic data for accessions available through Germinate
    7. Primary selection of accessions from drought prone environmnets used the following criteria: Growing season precipitation > 300mm, growing season mean aridity index >0.3, Aridity index during flowering and grain fill period >0.3<0.65.

     

     

    1. Summary of analysis and selection methods provided in Dataverse
    2. Summary data file providing results of multidimensional scaling of genomic distance with relevant passport, GIS and phenotypic data, provided through Germinate/Dataverse. File formatted for visualization in the software CurlyWhirly (https://ics.hutton.ac.uk/curlywhirly/)

    Product Status

    Available in August 2017
    250 seed of each accession availible upon request via 250 seed of each accession availible upon request via http://www.cimmyt.org/seed-request/#maize

    Comments

    These are unimproved materials, most suited for research or for large breeding programs interested in exploring exotic germplasm sources. These landraces are open pollinated materials carrying significant genotypic and phenotypic heterogeneity and heterozygosity. Those interested in these products may also be interested in semi-inbred Drought Tolerant Bridging germplasm.

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  • Test Workshop

    For more information

    • Please contact Sarah Hearne (s.hearne@cgiar.org) or Carlos Garay (c.garay@cgiar.org).

     

    Internal Information (not publically displayed)

    • Numbers of associated germplasm requests and requestor identity

     

    Key Users with whom quality specifications were discussed/agreed:

      Terry Molnar

      Kai Sonder

      Denise Costich

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