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John R. Clark and Chad E. Finn

M. Kellerhals and A. Aeppli. XII A 277 x Elstar; selected 1987; USPP 19,615; 6 Jan. 2009. Fruit: broad globose to conical globose to conical; medium, 77 mm diameter; little crowning; little greasiness; high amount and intensity of orange-red to red

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Charles F. Forney

. Decay is characterized by external lesions and often only part of the internal flesh is red, whereas the unaffected flesh remains white. Unlike most postharvest decays in other crops, there is little spread of disease from infected to healthy fruit in

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Juan Carlos Díaz-Pérez

cultivars were Camelot (Seminis, Oxnard, CA), Lafayette (Siegers Seed Co., Holland, MI), Sirius (Siegers Seed Co., Holland, MI), and Stiletto (Rogers, Boise, ID). ‘Camelot’ (red fruit) and ‘Lafayette’ (yellow fruit) are susceptible to Tomato spotted wilt

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Renee T. Threlfall, John R. Clark, Aubrey N. Dunteman, and Margaret L. Worthington

, the blackberry industry continues to be plagued by fruit with short shelf life and loss of quality during shipping ( Felts et al., 2020 ; Joo et al., 2011 ; Segantini et al., 2017 ). However, red drupelet reversion, a postharvest disorder where black

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Chae Shin Lim, Seong Mo Kang, Jeoung Lai Cho, Kenneth C. Gross, and Allan B. Woolf

grapefruits ( Kawada, 1980 ), whereas mature green fruit developed CI symptoms and appeared to be more sensitive to low temperatures than red-ripe pepper fruit ( Lin et al., 1993 ). However, little additional information has been documented on the relationship

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Shawn A. Mehlenbacher and David C. Smith

. Description Compared with ‘Contorta’, grafted trees of ‘Red Dragon’ are slightly more vigorous with a desirable growth habit that is spreading rather than pendulous and have moderate branching ( Figs. 2 and 3 ). Too little branching would result in a “leggy

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Geno A. Picchioni, Steven A. Weinbaum, and Patrick H. Brown

85 ORAL SESSION 23 (Abstr. 171–177) Temperate Fruit Crops: Nutrition

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Kyung-Ku Shim, Yoo-Mi Ha, and Jae-Ho Ha

This cultivar originated from a grafting mutant in grafted plants of a selected 100-year-old seedling of Hibiscus syriacus L. for 5 years. In 1999, the plant is named H. syriacus `Andong'. Hibiscus syriacus `Andong' is a deciduous, erect-growing, multiple-stemmed, dwarf type that, in 7 years, has grown 120 cm high and 65 cm wide, with dense branching to the base. It has more than 200 flowers in a 7-year-old tree. The alternate, leathery, waxy, dark green leaves are 5.3 cm long, 3.8 cm wide. But it is 0.48 mm thick and 34.42 mg/cm2 of fresh weight and then is thickier and heavier than that of other cultivars. Therefore, the plant is rarely damaged by aphids and is reliably hardy to -20 °C. The flowers are white with a prominent dark red eye spot that radiates along the veins to midpetal, 5-7 cm in diameter, and blooms profusely from July to October. Total flowering time of `Andong' was 36 h in both 1998 and 1999. It sets very little fruit. AIt does not only germinate by pollen, but also by seeds. This cultivar can be readily propagated by softwood (on 24 July with 7000 ppm IBA in the mist) or hardwood cutting (1000 ppm IBA) and by grafting on seedling H. syriacus understock.

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Andrew G. Reynolds, Margaret Cliff, Douglas A. Wardle, and Marjorie King

Eighty-five cultivars, selections and clones of winegrapes (Vitis) from European breeding and selection programs were evaluated between 1993–95 in a randomized completeblock experiment. These included selections from Alzey, Freiburg, Geilweilerhof, Geisenheim, Weinsberg, and Würzburg (Germany); Hungary; and the former USSR. Vines were grown under an organic management regime that included sodium silicate sprays for powdery mildew (Uncinula necator) control and oil + detergent for insect control but with little to no nitrogen or other nutritional inputs. The Weinsberg cultivars Heroldrebe and Helfensteiner showed promise viticulturally and sensorially as alternatives to `Pinot noir'. Cultivars from Geisenheim (`Gm 7117-10' and `Gm 7117-26') and Würzburg (`Cantaro' and `Fontanara') appeared promising as `Riesling' alternatives; many displayed similar sensory characteristics to `Riesling', along with reasonable viticultural performance. Cultivars selected at Alzey (`Faberrebe'), Freiburg (`Nobling'), and Weinsberg (`Holder') displayed sensory characteristics superior to the standard cultivar Müller-Thurgau, with very intense muscat, pear, fig, and spicy aromas and flavors. Several muscat-flavored Hungarian white wine cultivars appeared to be superior viticulturally and sensorially to the standard `Csabagyongye'; these included `Kozma Palne Muscotaly', `Zefir', and `Zengo'. Miscellaneous red wine cultivars that showed promise included Geilweilerhof cultivar Regent, and Hungarian selections Kozma 55 and Kozma 525. Vine yields decreased substantially in the 3-year evaluation period, primarily due to lack of nitrogen. Many of these cultivars appeared to be highly adaptable to viticultural regions where cold winters and low heat units during fruit maturation presently restrict cultivar choices.

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Keith W. Savin, Stanley C. Baudinette, Michael W. Graham, Ellen L-J. White, Michael Z. Michael, Ann Bayly, Chin-Yi Lu, Stephen F. Chandler, and Edwina C. Cornish

Ethylene is essential for the senescence process in many fruit and flowers. In the last two steps in the biosynthesis of ethylene in plants ACC synthase converts S-adenosyl methionine to 1-aminocyclopropane-1-carboxylic acid(ACC). ACC oxidase (ACO) then degrades ACC to ethylene. Inhibitors of ethylene synthesis, such as amino-oxyacetic acid, and of the response to ethylene, such as silver thiosulphate, delay or prevent senescence. By expression of an antisense version of ACO RNA, we have generated two varieties of transgenic carnation which produce flowers with an extended vase life. These were produced using the cultivars Red Sim and White Sim. Flowers from these plants produce very little ethylene and normally fail to display the inrolling phenotype typical of senescence in this species. At the time after harvest when inrolling would normally lake place (5 days), the antisense ACO flowers produce only barely detectable levels of endogenous ACO mRNA or ACS (ACC Synthase) mRNA. Exposure to exogenous ethylene(100ppm) induces inrolling and production of ACS and ACO mRNA species. Such carnations will be valuable both as a commercial product and as a tool for further exploring the role of ethylene in carnation flower senescence and leaf wound response.