Richard E. Veilleux
Junjun Fan, Wangxiang Zhang, Donglin Zhang, Ting Zhou, Hao Jiang, Guibin Wang, and Fuliang Cao
be introduced. Although many professional and independent breeders are working on flowering crabapple breeding in the United States, China, and several other countries, the yield of new cultivars has been limited in recent years. There is still a
Dingmeng Hu, Jingwei Xu, Youji Han, Xingjian Dun, Lihui Wang, and Shengxiang Zhu
), which is a new cultivar selected by our research team. These two cultivars display the same tree habit, flower type and shape, and petal shape ( Figs. 1 and 2 ), but the color of the middle zone of the inner side of the petal differs. The color of this
Xingsui Wang, Yuting Huang, Ji Tian, Jie Zhang, Yanfen Lu, Xiaoxiao Qin, Yujing Hu, and Yuncong Yao
’, that has been selected from mutants of M. ‘Radiant’ that were induced by 60 Coγ radiation. This new cultivar has attracted much attention due to its bright rose-red flowers with larger flower diameter and long blossoming period; red and yellow leaves
A. Douglas Brede
R.N. Trigiano, M.T. Windham, and W.T. Witte
Powdery mildew (Microsphaera pulchra) of flowering dogwood (Cornus florida L.) has become a significant problem of trees in nursery production as well as in the landscapes and forests of the eastern United States. The disease significantly reduces growth and berry production by older established trees and may contribute to the inability of younger trees (liners) in production to survive winter dormancy. Disease resistance in named cultivars is limited to partial resistance found in `Cherokee Brave'—all other cultivars are extremely susceptible. Until now, the only disease control measure was to establish an expensive, labor-intensive, preventive fungicide program. We examined >22,000 seedlings and identified 20 that were extremely resistant to powdery mildew. Three trees with white bracts were selected from the 20 and released as patent-pending cultivars. `Karen's Appalachian Blush' has long, non-overlapping, pink fringed bracts with a delicate appearance. `Kay's Appalachian Mist' has creamy white, slightly overlapping bracts with deeply pigmented clefts. `Jean's Appalachian Snow' has large, strongly overlapping bracts with non-pigmented clefts. The three powdery mildew-resistant cultivars will be entered into an existing breeding program with `Appalachian Spring', a cultivar released by the Tennessee Agriculture Experiment Station and resistant to dogwood anthracnose, in an attempt to produce trees that are resistant to both diseases.
Phillip A. Wadl, Mark T. Windham, Richard Evans, and Robert N. Trigiano
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.