• Maize with Putative Drought Tolerant Landraces


    These landrace accessions from CIMMYT germplasm bank 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. 00 o 50 accesiones. Estos paneles maximizan y mantienen la diversidad genómica de la colección completa de interés.

     

    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. Any available phenotypic data for the accessions available through Germinate (http://germinate.seedsofdiscovery.org/).
    4. Genotypic data for accessions available through Germinate
    5. Summary of analysis and selection methods provided in Dataverse (http://data.cimmyt.org/dvn/dv/seedsofdiscoverydvn/).


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    1. Summary data file providing results of multidimensional scaling of genomic distance with relevant passport, GIS and phenotypic data, provided through Dataverse. File formatted for visualization using CurlyWhirly software (https://ics.hutton.ac.uk/curlywhirly/).
    2. Primary selection of accessions from drought prone environments 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.

     

    Availability

    Available September 2017.
    250 seed of each accession available 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.

    Primary Users:

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

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