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Jennifer L. Baeten, Thomas C. Koch, and Irwin L. Goldman

Poster Session 15—Vegetable Breeding 1 19 July 2005, 12:00–12:45 p.m. Poster Hall–Ballroom E/F

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Mingbo Qin, Chiwon W. Lee, Alex Y. Borovkov, and Murray E. Duysen

101 POSTER SESSION 3A (Abstr. 127–158) Breeding & Genetics–Vegetables

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W.H. Gabelman, I.L. Goldman, and D. N. Breitbach

22 POSTER SESSION 3 (Abstr. 438-459) Breeding/Genetics

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Megan J. Bowman, David K. Willis, and Philipp W. Simon

-performance liquid chromatography (HPLC) experiments. White cultivated (B6644), yellow (B7248), orange (B2566), dark orange (B2327) experimental inbreds developed by the USDA carrot breeding program were grown for each genotype under greenhouse conditions. Plants

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Claire H. Luby and Irwin L. Goldman

freedom to operate for breeding and create diverse carrot populations based on market class and root color. These composite populations are meant to represent some of the diversity present in commercially available carrot germplasm that is available to use

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James M. Bradeen and Philipp Simon

84 ORAL SESSION 17 (Abstr. 493–499) Breeding & Genetics–Vegetables

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J. Kays and Wayne J. McLaurin

Flavor is a primary trait in the selection of foods. The role of flavor in acceptance of the sweetpotato, flavors status as a selection trait in existing breeding programs, and our current understanding of the flavor chemistry of the sweetpotato was reviewed. The sweetpotato, unlike most staple crops, has a very distinct and dominant flavor. In typical breeding programs, however, flavor is generally one of the last traits screened. A tremendous diversity and range of flavors has been reported within the sweetpotato germplasm (e.g., acidic, bland, baked potato, boiled potato. carrot, chalky, chemical, citrus, earthy, Ipomoeo/terpene, lemon, musty, pumpkin, salty, squash (titer type), starchy, sweet, sweetpotato (traditional), terpene, and turnip. These results indicate that the genetic diversity for flavor present in sweetpotato germplasm will allow making substantial changes in the flavor of new cultivars, thus potentially opening previously unexploited or under-exploited markets. Implementation involves solving two primary problems: 1) identification of desirable flavor ideotypes; and development of procedures that allow maximizing the selection of specific flavor types.

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Charles E. Christianson, Stephen S. Jones, and Lindsey J. du Toit

leaf spot ( Cercospora carotae ), were selected from the preliminary screening. Two inbred male-sterile carrot lines (A2566 and A0493) from Dr. Philip Simon’s USDA Agricultural Research Service (ARS) carrot breeding program at the University of

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Adam Bolton and Philipp Simon

accessions from Tunisia. The current lack of information regarding salinity tolerance during the germination stage for carrot suggests the need for a large germplasm evaluation to identify potentially tolerant accessions that could be used for breeding or

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Adam Bolton, Aneela Nijabat, Muhammad Mahmood-ur-Rehman, Naima Huma Naveed, A.T.M. Majharul Mannan, Aamir Ali, Mohamed A. Rahim, and Philipp Simon

accessions from the USDA NPGS collection of PIs, 15 inbred lines from the USDA carrot breeding program, and eight commercial fresh market hybrids widely grown in the United States were included in this analysis. To better identify heat stress effects on