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Tyler Hoskins
Department of Horticulture, Oregon State University, 4017 Agricultural and Life Sciences, Corvallis, OR 97331, USA

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Journal article
Published: 21 October 2020 in Horticulturae
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Maples are common street and shade trees throughout the temperate zone. They are widely used for their wide range of ornamental traits and adaptability, particularly to urban settings. Unfortunately, some species such as Acer tataricum ssp. ginnala (Amur maple) and A. platanoides (Norway maple) have escaped cultivation to become pests or in some cases threaten native flora. However, these species remain economically important and are still asked for by name. To ameliorate potential future ecological damage from additional escapes, we have been breeding for sterile forms using ploidy manipulation and backcrossing to develop triploids. We began with a series of experiments to develop tetraploids of Amur, Norway, and trident (A. buergerianum) maples. Treatment of seedlings at the cotyledon or first true leaf stage was successful in inducing tetraploids of each species. Mortality, cytochimeras, and tetraploids varied among species. After identifying tetraploids, they were field planted alongside diploid cultivars and seedlings, which served as pollinizers in open-pollination. Seedlings derived from open-pollinated tetraploids were generally found to be a high percentage triploids. Thus far, no Norway or trident maple triploids have flowered but after three years we observed five, 22, and 22 Amur maple triploids flowering over three respective years with no seedlings recovered to date. Further evaluation is required but our findings are encouraging that the triploids we have developed thus far will be sterile and provide new cultivars for nursery growers and land managers.

ACS Style

Ryan Contreras; Tyler Hoskins. Developing Triploid Maples. Horticulturae 2020, 6, 70 .

AMA Style

Ryan Contreras, Tyler Hoskins. Developing Triploid Maples. Horticulturae. 2020; 6 (4):70.

Chicago/Turabian Style

Ryan Contreras; Tyler Hoskins. 2020. "Developing Triploid Maples." Horticulturae 6, no. 4: 70.