福建农业学报2016，Vol.31Issue(8)：810-815,6.DOI:10.19303/j.issn.1008-0384.2016.08.004
电导率法及Logistic方程鉴定马铃薯材料的耐寒性
Predicting Cold Tolerance of Potato Plants by Electric Conductivity Measurements on Leavesunder Low-temperature Stress
摘要
Abstract
Eighteen potato cultivars and forty-seven strains were tested for their abilites to tolerate frost and freezing temperatures.Leaves freshly detached from the potato plants were exposed to low temperatures for electric conductivity measurement to derive the medium lethal temperatures,LT50 ,on each sample.As temperature was lowered,the relative electric conductivity of the potato leaves responded in a typical S function in a logistic equation.The LT50 obtained from the regression equation varied from -3.8℃ to -1℃.They significantly differed among different cultivars and stains.Based on LT50 ,cold resistances of the various potato cultivars and strains were predicted and clustered into 3 categories, sensitive,medium,and tolerant to freezing.Among them,the two cultivars and 4 strains most tolerant to freezing were preserved for breeding low-temperature resistant varieties in the future.关键词
马铃薯/电导率/半致死温度/耐寒Key words
potato/relative electric conductivity/LT50/cold tolerance分类
农业科技引用本文复制引用
李华伟,邱思鑫,汤浩,林志坚,许泳清,罗文彬,纪荣昌,张鸿,李国良,刘中华,邱永祥..电导率法及Logistic方程鉴定马铃薯材料的耐寒性[J].福建农业学报,2016,31(8):810-815,6.基金项目
十二五国家科技支撑计划项目(2012BAD02B05) （2012BAD02B05）
福建省科技计划项目---省属公益类科研院所基本科研专项(2014R1101010-13) （2014R1101010-13）
