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Philip L. Forsline and Kim E. Hummer

vulnerability statements, identify gaps in the United States national plant collections, and recommend areas for germplasm collection. Between 1985 and 1995, the late Dr. Calvin Sperling, Plant Explorer for the USDA ARS, National Germplasm Resources Laboratory

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G.W. Lightner

, Wageningen, The Netherlands; K.S. Yoder, Virginia Polytechnic Institute and State Univ.; T. van der Zwet, USDA-ARS, Appalachian Fruit Research Station, West Virginia.

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D.H. Putnam, G.H. Heichel, and L.A. Field

1 Assistant Professor. 2 Formerly Plant Physiologist, Plant Science Research Unit, USDA-ARS, St. Paul, Minn. Current address: Head, Dept. of Agronomy, Univ. of Illinois, 1102 S. Goodwin, Urbana, IL 61801. 3 Scientist. Joint contribution of

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Maria I. Villarroel-Zeballos, Chunda Feng, Angela Iglesias, Lindsey J. du Toit, and James C. Correll

). Screening the USDA spinach germplasm collection has been valuable for identifying resistance to several diseases including downy mildew ( Brandenberger et al., 1991) , Fusarium wilt ( Laguna, 2000 ), and leaf spot ( Mou et al., 2008 ). However, there have

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Ryan N. Contreras, John M. Ruter, James S. Owen Jr., and Andy Hoegh

chlorophyll a ( C a ):chlorophyll b ( C b ), total carotenoids ( C x + c ), and ratio of ( C a + b ):( C x + c ) exhibited a strong relationship with greenness as measured by visual color rating at the University of Georgia Tifton Campus (USDA Zone 8b

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D.L. Peterson

All programs and services of the USDA are offered on a nondiscriminatory basis with regard to race, color, national origin, religion, sex, age, marital status, or handicap. Mention of trade names or commercial products in this publication is solely

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Warren F. Lamboy and Christopher G. Alpha

proprietary product does not constitute an endorsement or recommendation for use by the USDA. We are grateful to John Bowers and Carole Meredith of the Univ. of California, Davis, for providing primer sequences and amplification protocols and for fruitful

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Stephen S. Miller, James R. Schupp, Tara A. Baugher, and Scott D. Wolford

in areas prone to late spring frosts. Schupp et al. (2008) evaluated a direct drive double–spiked drum shaker developed by the USDA to harvest citrus for thinning peaches at the green fruit stage (20 to 30 mm diameter). In pillar growth habit peach

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Mark W. Farnham, Michael A. Grusak, and Min Wang

1 To whom reprint requests should be addressed. This project was funded in part with federal funds from the USDA-ARS under Cooperative Agreement 58-6250-6-001. We acknowledge technical assistance of Eric Gomperts. The contents of this publication do

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Lisa L. Baxter and Brian M. Schwartz

The Beginning of a Legacy In 1946, Glen Burton and the USDA-ARS initiated a turfgrass breeding program in Tifton, GA to develop better bermudagrasses to replace sand putting greens or seeded varieties ( Burton, 1991 ). Researchers scouted golf