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Mark W. Farnham and Thomas Bjorkman

temperature stress in broccoli. Breeding for tolerance to this stress has great potential for meeting increased demand by growing in a larger production region. Most vegetable crops are adapted to a modest range in temperatures with the optimum varying

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Ryan J. Hayes, Mark A. Trent, Beiquan Mou, Ivan Simko, Samantha J. Gebben, and Carolee T. Bull

different leafy green vegetable species such as spinach ( Spinacia oleracea L.), radicchio ( Cichorium intybus L.), frisee ( Cichorium endivia L.), arugula ( Eruca vesicaria L.), tatsoi and mizuna ( Brassica rapa L.), and mache [ Valerianella locusta

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Irwin L. Goldman

patterns and their effects. BREEDING AND ANALYSIS OF HEALTH FUNCTIONAL COMPOUNDS There has been a steady rise in the amount of research and development aimed at understanding and improving the phytonutrient content of vegetable crops ( Newell

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Shigenori Yaguchi, Masanori Atarashi, Masatoshi Iwai, Shin-ichi Masuzaki, Naoki Yamauchi, and Masayoshi Shigyo

Japanese bunching onion ( Allium fistulosum ) is one of the most important vegetable crops in eastern Asia, especially in Japan, Korea, and China ( Inden and Asahira, 1990 ). Allium fistulosum is a perennial plant, grown commercially as an

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Ravza F. Mavlyanova, Faizulla Kh. Abdullaev, Payzillo Khodjiev, David E. Zaurov, Thomas J. Molnar, Joseph C. Goffreda, Thomas J. Orton, and C. Reed Funk

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Alvin M. Simmons and Amnon Levi

The B-biotype sweetpotato whitefly, Bemisia tabaci (Gennadius), feeds on and damages numerous vegetable crops including watermelon (Citrullus sp.). Seven watermelon cultivars, a triploid line, and 16 U.S. Plant Introduction accessions (PIs) of C. lanatus var. lanatus; 10 PIs of C. lanatus var. citroides; and eight PIs of C. colocynthis, were evaluated for resistance to B. tabaci. Bioassays were based on nonpreference and performance of the whiteflies on the 42 Citrullus genotypes. Most of the watermelon cultivars and C. lanatus PIs tested were highly susceptible to whitefly infestation, while the C. colocynthis accessions exhibited whitefly resistance. Among the C. colocynthis accessions tested, PI 386015, PI 386018, and PI 386024 were most resistant to B. tabaci. This study identified useful sources of germplasm that can be used for the improvement of watermelon for resistance to whiteflies.

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Kelechi Ogbuji, Gloria S. McCutcheon, Alvin M. Simmons, Maurice E. Snook, Howard F. Harrison, and Amnon Levi

://www.ars-grin.gov ) includes over 1800 U.S. PIs. These PIs have been useful sources of germplasm for identifying disease or pest resistance that through intensive breeding programs could be incorporated into elite watermelon cultivars. Whiteflies [ Bemisia tabaci (Gennadius

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Julie Villand, Terry Berke, Liwayway Engle, and James Nienhuis

150 ORAL SESSION 42 (Abstr. 668–674) Breeding & Genetics–Vegetables

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Jennifer L. Waters and Stephen R. King

Poster Session 21—Vegetable Breeding 1 28 July 2006, 1:15–2:00 p.m.