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413 Amer J of Potato Res (2001) 78:413-419 Jacqueline Lee: A Late-Blight-Resistant Tablestock Variety D.S. Douches'", K. Jastrzebski', J. Coombs', W. W. Kirk 2 , K. J. Felcher ', R. Hammerschmidt ", and R. W. Chase I I Dept. of Crop and Soil Sciences, Michigan State University, E. Lansing, MJ 48824. 'Dept. of Botany and Plant Pathology, Michigan State University, E. Lansing, MJ 48824. *Corresponding author. David S. Douches, Phone: 517-353-3145; FAX 517-353-5174; dou chesd @msu.edu ABSTRACT Jacqueline Lee has a bright golden skin, yellow flesh, attractive oval shape, and excellent cooking qualities that make it suitable for tablestock use. In addition, it has been determined to have a high level of foliar resistance to the US-8 genotype of Phytophthora infestans (Mont.) de Bary under Michigan field and greenhouse conditions. It is a full-season variety with vine maturity similar to Snowden. Jacqueline Lee has high yield potential. It has a high set (14-16 tuberslhill) of medium sized tubers that leads to 65%-80% marketable yield. Tubers are low in internal and external defects. It has a scab reaction simi- lar to Atlantic, and the tubers have been observed to have a long dormancy. RESUMEN Jacqueline Lee es una variedad de papa de pie I amarilla brillante para consumo fresco, tuberculos de forma oval muy atractivos y de excelente calidad de cocimiento. Esta variedad tiene altos niveles de resisten- cia foliar al genotypo US-8 de Phytophthora infestans (Mont.) de Bary, tanto en invernadero como en condi- ciones de campo, esta evaluacion fue hecha en Michigan, USA. Jacqueline Lee es una variedad con alto potencial de rendimiento y maduraclon media tardia similar a Snowden. Produce un gran numero de tuberculos (14-16 tuberculos/semilla) de tamafio mediano, de los cuales 65- Accepted for publication August 2, 2001. ADDffiONAL KEYWORDS: Solanum tuberosum, potato, Phylophlhora infesums. 80 % son tuberculos comercializables . Los tuberculos tienen resistencia a defectos internos y externos. Tam- bien tienen resistencia a la sarna (Streptomyces scabies Thaxter) similar a la variedad Atlantic y dormancia Iarga, BACKGROUND Jacqueline Lee is a new potato variety (Solanum tubero- sum L.) developed at Michigan State University with resistance to the US-8 genotype of late blight (Phytophthora injestans Mont. de Bary). Jacqueline Lee was evaluated as seedling num- ber MSG274-3. It is a selection from a cross in 1994between the late-maturing, late-blight-resistant Mexican variety Tollocan and the early-maturing variety Chaleur (Dejong et al. 1995) for the purpose of breeding late-blight-resistant cultivars with mid-sea- son maturity. Jacqueline Lee is named for the daughter of the breeder. Jacqueline Lee is an oval/oblong tablestock selection with a high tuber set. The tubers have a bright skin and a smooth, attractive appearance with a yellow flesh that is typical of many European cultivars (Figure 1). The primary merit of this selec- tion is its strong foliar resistance to the US-8 genotype of late blight (as determined by four years of field testing) combined with a vine maturity that is similar to Snowden. Other strengths of Jacqueline Lee are that the tubers have very low incidence of internal defects, excellent culinary quality, and a long dormancy. The pedigree of Jacqueline Lee is described in Figure 2. The seedling generation was grown in 1994, followed by two years of selection and seed multiplication at Lake City Experiment Station, Lake City, MI. Since 1997,it has been tested in replicated agronomic trials at the Montcalm Research Farm, Entrican, MI, and in inoculated late blight trials at the Muck Soils Research Farm, Bath, MI. in 1999it was entered into farm trials in Michigan as well as commercial seed production
