Germplasm Release: Three Tetraploid Potato Clones with Resistance to Common Scab

Jansky, Shelley; Douches, David; Haynes, Kathleen

Germplasm Release: Three Tetraploid Potato Clones with Resistance to Common Scab

2018

Jansky, Shelley | Douches, David | Haynes, Kathleen

Common scab caused by the soil-borne bacterium Streptomyces scabies is a serious disease for the potato industry. We have identified a strong source of resistance in the diploid wild relative Solanum chacoense. This resistance has been introgressed into tetraploid cultivated potato via unilateral sexual polyploidization. This paper describes three hybrid clones (M8, M16, M17) for use by potato breeding programs to enhance resistance to common scab. They were created by crossing a diploid clone (50% S. tuberosum, 50% S. chacoense) to tetraploid cultivars, producing hybrids with 75% cultivated and 25% wild germplasm. The clones are male and female fertile, and are adapted to temperate zone production environments.

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