‘寒富’苹果枝条低温适应性研究

Research on Shoot Cold Tolerance of‘ Hanfu ’Apple

以‘寒富’苹果及其亲本系‘东光’、‘富士’为试材,对人工低温胁迫下枝条电导率进行了研究。结果表明:3个苹果品种枝条的电导率随温度的降低而升高,但品种之间差异不明显。结合Logistic方程计算出的‘寒富’、‘东光’、‘富士’的低温半致死温度分别为-43.3、-45.3、-37.5℃。通过对3个苹果品种枝条电导率的比较表明,‘东光’苹果低温适应性最强,‘富士’苹果对低温适应能力最弱,‘寒富’苹果居中。

Hanfu apple and its parents （＇ Dongguang＇ × ＇Fuji） were used to study shoot cold tolerance through measuring electric conductivity under artificial lowtemperature stress. The results showed that shoots electric conductivity of Hanfu＇ apple and its parents increased as decrease of cold temperature, with insignificant differences among three apple cultivars. The semilethal temperatures of ＇ Hanfu＇ apple, ＇ Dongguang＇ and ＇ Fuji＇, calculating by Logistic equation,were -43.3, - 45. 3, - 37. 5℃, respectively. In conclusion, cold tolerance of ＇ Dongguang＇ apple was the strongest, ＇Fuji＇ apple was the weakest,and ＇Hanfu＇ was the middle one.