%0 Journal Article %T Comparison of Different Cultivars of Blueberry Overwintering Ability in Qingdao of China %A Wan-Ping Liu %A Shu-Chai Su %A Xiao Liu %A Zhi-Xia Hou %J American Journal of Plant Sciences %P 391-396 %@ 2158-2750 %D 2012 %I Scientific Research Publishing %R 10.4236/ajps.2012.33047 %X In order to select severe overwintering abilitied blueberry cultivars for cold resistance of annual branches, promoting breeding high quality cultivars, a study had been conducted into field-planting shoots overwintering ability and the relative conductivity, MDA content, SOD of 7 different kinds of blueberries under artificial cooling process. According to survey results, under field conditions, Different cultivars of blueberries showed significantly difference, ranging from 56.67% of Bluegold to 12.80% of Darrow. With the temperature decreasing, changes of relative conductivity, MDA content and SOD in annual branches had a strong regularity and the hardiness of these cultivars is: Northland > Chippewa > Coville > Bluecroup > Darrow > Bluegold > Powderblue. %K Blueberry %K Cultivars %K Overwintering Ability %K Annual Branch %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=17929