Cryptic D Genome Variation for Quantitative Traits
Eric Olson,
Assistant Professor,
Michigan State University
The D-genome progenitor of hexaploid wheat, Aegilops tauschii Coss., is a rich source of valuable alleles that are transferrable to hexaploid wheat. A systematic exploration of the cryptic genetic variation from Ae. tauschii for important agronomic traits is being done using a nested association mapping population sampling seven Ae. tauschii accessions. A high-resolution SNP map of the D genome has been developed using genotyping-by-sequencing. Mapping of single-locus disease resistance traits in this population is highly feasible. Multi-location trials are being conducted to determine variation for quantitative traits including phenology, yield, and yield components. QTL underlying trait variation can be identified. Utilizing the relationship of the Ae. tauschii donors, genomic selection models can be developed to predict the performance of Ae. tauschii alleles in wheat breeding programs.
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