不同黑莓品种的抗冻性分析

Analysis of frozen resistance of different cultivars of blackberry (Rubus spp.)

采用电导法测定了7个黑莓(Rubus spp.)品种及1个树莓品种(对照)经冷冻处理后电解质渗出率的变化,并用二项式和Logistics方程对测定数据进行了拟合。结果表明,经0℃至-35℃的冷冻处理后,7个黑莓品种枝条的电解质渗出率大多高于对照;黑莓品种‘Young’枝条的电解质渗出率相对较小。二项式的拟合度高于Logistics方程,二项式拟合结果表明,供试黑莓品种的抗冻性均低于树莓品种‘Reveille’,其中黑莓品种‘Young’的抗冻性较强,LT50为-31.0℃;黑莓品种‘Brazos’和‘Arapaho’的LT50分别为-19.4℃和-19.9℃,抗冻性较弱。

Change of electrolyte leakage ratio of seven cuhivars of blackberry （Rubus spp. ） and one cultivar of raspberry （control） was determined by conductometry after frozen treatment, and the experiment datums were analyzed by the binomial and the Logistics formulas. The results showed that electrolyte leakage ratio of seven cuhivars of blackberry was almost higher than that of the control after treated by low temperature from 0 ℃ to - 35 ℃. The electrolyte leakage ratio of cuhivar＇ Young＇ was relatively low. The fitting degree of binomial formula was higher than that of Logistics formula. The fitting result of binomial formula indicated that frozen resistance of all blackberry cuhivars was lower than that of raspberry ＇ Reveille＇ , and frozen resistance of cuhivar ＇ Young＇ was the highest （ LT50 - 31.0 ℃ ）, whereas ＇ Brazos＇ and ＇ Arapaho＇ （LT50 - 19.4 ℃ and - 19.9 ℃） had the lowest frozen resistance.