电导率法结合Logistic方程鉴定大蒜品种资源的耐寒性  

Measurement of cold tolerance of garlic germplasm resources based on electrical conductivity method combining with Logistic equation

作　　者：赵永强[1] 樊继德[1] 杨艳[1] 陆信娟[1] 刘灿玉 张碧薇 杨峰[1] Zhao Yong-qiang;Fan Ji-de;Yang Yan;Lu Xin-juan;Liu Can-yu;Zhang Bi-wei;Yang Feng(Xuzhou Institute of Agricultural Sciences in Xuhuai Area,Jiangsu,Xuzhou,Jiangsu 221121,China)

机构地区：[1]江苏徐淮地区徐州农业科学研究所

出　　处：《广西农学报》2019年第3期18-20,32,共4页Journal of Guangxi Agriculture

基　　金：国家特色蔬菜产业技术体系(CARS-24-A-07);江苏现代农业(蔬菜)产业技术体系(TATS[2018] 265);江苏省科技项目(BE2017304)

摘　　要：为评价大蒜品种资源的耐寒性,以8份田间自然生长的大蒜品种资源离体叶片为材料,通过室内低温胁迫处理,用电导率法结合Logistic方程对其耐寒性进行鉴定。结果表明,随着处理温度的降低,供试材料相对电导率逐渐升高,呈“S”型曲线变化趋势。供试材料低温半致死温度(LT50)介于-0.587℃至-3.113℃之间。根据LT50结果,确定参试的8个大蒜品种资源的抗寒性强弱依次为中牟大蒜、徐蒜6号、邢台紫皮蒜、莱芜红皮蒜、徐州白蒜、恩施红蒜、徐蒜3号和玉林白蒜。同时发现,胁迫温度与LT50之间的相关性分析表明,以-3℃处理下相关性最高,其次为0℃和-6℃。Applying 8 garlic germplasm resources as experimental materials by relative conductivity method with Logistic equation get the semi-lethal low temperature(LT50).The results showed that,as temperature was lowered,the relative electric conductivity of the garlic leaves responded in a typical S function in a logistic equation.The LT50 obtained from the regression equation varied from-0.587℃to-3.113℃.Based on LT50,the order of cold resistance was‘Zhongmou Garlic’,‘Xuzhou Garlic No.6’,‘Xingtai Purple Garlic’,‘Laiwu Red Garlic’,‘Xuzhou white garlic’,‘Enshi red garlic’,‘Xuzhou garlic No.3’and‘Yulin white garlic’.In addition,correlation analysis between stress temperature and LT50 showed that the correlation was highest at-3℃,followed by 0℃and-6℃.

关 键 词：大蒜 电导率 LOGISTIC方程 半致死温度 耐寒性 

分 类 号：S633.4[农业科学—蔬菜学]