Dihaploid Potato Breeding at Michigan State University
Date & Time
Tuesday, July 19, 2022, 8:30 AM
Kate Shaw

Our goal is to continue developing a broad-based dihaploid germplasm that can be used in diploid potato breeding. We started by crossing tetraploid germplasm with a known haploid inducers, S. Phureja IVP 101 and PL-4. Tetraploid parent lines were selected based on traits such as high yield, disease resistance, and market class, among others. Thousands of true seeds have been thus produced, approximately 70 of which have proven to be successful 2x breeding parents so far. In the past, plants that we determined to be diploid were then SNP genotyped with the Infinium 22K Potato SNP array for further ploidy confirmation. We attempt to utilize a new scheme in recent years to confirm fertility and therefore breeding value earlier on to increase efficiency of adding new dihaploids to the MSU breeding pipeline. We also have grown a number of MSU-produced dihaploid lines in the field to determine such traits as specific gravity, scab susceptibility, and overall appearance. These dihaploids are the foundation of our diploid breeding program.

Session Type
Parent Session
7/19 - Concurrent Sessions D