Cold Hardiness of Cold Climate Interspecific Hybrid Grapevines Grown in a Cold Climate Region

نویسندگان

چکیده

Cold climate interspecific hybrid grapevines (CCIHG) selected for their superior midwinter cold hardiness have expanded grape production to regions. However, extreme weather events, such as polar vortexes and the high frequency of fall spring freezes, often result in yield vine losses. The main objective this study was evaluate changes bud five CCIHG cultivars grown upper Midwest identify relative risk freeze damage throughout dormant period adapt a prediction model Bud evaluated biweekly by measuring lethal temperatures buds using differential thermal analysis (DTA). our had an early acclimation response with increased levels before occurrence freezing temperatures. Maximum (-28 -30°C) were observed both years February; however, deeper stress resistance, probably attained dehydration, not detected DTA. rapid deacclimation that accelerated additional chilling accumulation during spring. reparametrizing discrete-dynamic expanding range ecodormant threshold resulted predictions average root mean square error (RMSE) = 1.01. Although hardiness, fast responses increase spring, thus trait should be future cultivar release. development tools will aid growers decision-making minimize

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ژورنال

عنوان ژورنال: American Journal of Enology and Viticulture

سال: 2021

ISSN: ['0002-9254', '1943-7749']

DOI: https://doi.org/10.5344/ajev.2021.21001