Background and Aims As grapegrowers move to adapt to climate change, they need more detailed information on what cultivars to plant and where to plant them. The aims of this study were to understand how different cultivars in different regions are responding to changes in climate, in order to inform future cultivar selections. Methods and Results Trends in the day of year maturity (DOYM) between 1999 and 2018 were analysed for 23 grape cultivars (covering at least 7 years) and four Victorian vineyard regions against vintage year, seasonal growing degree day (GDDSep–Mar) and Spring Index. In most cases there were significant trends in DOYM advancement as a function of GDDSep–Mar and spring index. Temporal advancement of DOYM was more variable. One cultivar showed a significant advancement at two of three sites and another showed a significant delay. Different cultivars advanced DOYM at significantly different rates at a given site, later ripening cultivars advanced DOYM faster than earlier ripening cultivars and for a cultivar grown across several sites, the DOYM advancement was faster at cooler sites. Conclusions Grapevine cultivars respond to warming temperature differently and the advancement of grape maturity is predicted to slow as temperature further increases. Significance of the Study The study showed diversity in the phenological response of cultivars to temperature, which may be utilised to better adapt to climate change.

中文翻译：

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葡萄成熟度的提高：对比品种和地区之间的比较

背景和目标 随着葡萄种植者开始适应气候变化，他们需要关于种植哪些品种以及种植地点的更多详细信息。本研究的目的是了解不同地区的不同品种如何应对气候变化，以便为未来的品种选择提供信息。方法和结果 分析了 1999 年至 2018 年间 23 个葡萄品种（覆盖至少 7 年）和四个维多利亚葡萄园地区的年份成熟日 (DOYM) 趋势与年份、季节性生长期 (GDDSep-Mar) 和春季指数。在大多数情况下，作为 GDDSep-Mar 和 spring 指数的函数，DOYM 的进步有显着的趋势。DOYM 的时间推进变化更大。一个品种在三个地点中的两个显示出显着进步，而另一个显示出显着延迟。不同品种在给定地点以显着不同的速率推进 DOYM，晚熟品种比早熟品种推进 DOYM 的速度更快，对于跨多个地点种植的品种，在较冷的地点，DOYM 推进速度更快。结论葡萄品种对温度升高的反应不同，随着温度的进一步升高，葡萄成熟的进程预计会减慢。研究意义 该研究表明，品种对温度的物候响应具有多样性，可用于更好地适应气候变化。结论葡萄品种对温度升高的反应不同，随着温度的进一步升高，葡萄成熟的进程预计会减慢。研究意义 该研究表明，品种对温度的物候响应具有多样性，可用于更好地适应气候变化。结论葡萄品种对温度升高的反应不同，随着温度的进一步升高，葡萄成熟的进程预计会减慢。研究意义 本研究表明，品种对温度的物候响应具有多样性，可用于更好地适应气候变化。