【摘要】 通过研究引种到新疆的平欧杂交榛抗寒性,为筛选出抗寒性强的品种(系)、适地栽培和生产推广提供依据。以引入的平欧杂交榛13个品种(系)(80-13、85-152、82-11、84-36、82-15、80-4、85-49、80-43、84-254、B21、84-310、84-226和83-33)的1年生休眠枝条为试材,进行-15、-20、-25、-30、-35和-40℃的低温处理,测定相对电导率并拟合logistic方程计算半致死温度(LT50)、萌芽率、游离脯氨酸质量分数、丙二醛质量摩尔浓度、过氧化物酶活性,并进行抗寒性分析。测得的相对电导率呈"S"型曲线,与处理低温呈极显著负相关;半致死温度在-27.21~-33.99℃内;在不同低温处理后,84-254和83-33的丙二醛质量摩尔浓度显著较低;85-152、82-11、84-36、85-49和84-254的游离脯氨酸质量分数显著较高;85-152、80-43、84-254和84-310的过氧化物酶活性显著较高;84-254的萌芽率显著较高;相对电导率与4个指标呈极显著相关。运用隶属函数值法综合评价其抗寒性,可知其抗寒性由大到小的排序为:84-254、85-152、84-310、84-226、80-43、B21、85-49、82-15、80-13、82-11、80-4、84-36、83-33。更多还原

【Abstract】 We studied the cold resistance of Corylus heterophylla × Corylus avellana in Xinjiang to select the variety with high cold resistance,and provide the basis for cultivation and promotion. We introduced one-year-old twigs of thirteen hazelnuts( 80- 13,85- 152,82- 11,84- 36,82- 15,80- 4,85- 49,80- 43,84- 254,B21,84- 310,84- 226 and 83-33) as the test materials to measure bud electrolyte leakage,semi- lethal temperature( LT50),germination rate and physiological indexes such as proline,malondialdehyde content,peroxidase activity under different low temperature at- 15,-20,- 25,- 30,- 35,and- 40 ℃,and analyzed the cold resistance. The electrolyte leakage increased like "S"curve,showed highly significantly negative correlation with processing temperature of- 27. 21-- 33. 99 ℃. Under different low temperature,malondialdehyde contents of 84- 254 and 83- 33 were significantly lower than those in other cultivars. The proline contents of 85- 152,82- 11,84- 36,85- 49 and 84- 254 were significantly higher than those in other cultivars. The peroxidase activity of 85- 152、80- 43、84- 254 and 84- 310 were significantly higher than those in other cultivars. The germination rate of 84- 254 was significantly higher than that in other cultivars. The electrolyte leakage was highly significant correlation with the other indexes. We used membership function to evaluate the cold resistance,and the order of cold resistance in descending order was 84- 254,85- 152,84- 310,84- 226,80- 43,B21,85- 49,82-15,80- 13,82- 11,80- 4,84- 36,83- 33.更多还原