【摘要】 采用 P- V技术 ,以 P- V曲线水分参数为基础 ,对 8个杨树杂交无性系品种的抗旱性进行了排序和聚类分析。结果表明 ,杂交无性系品种的抗旱性均大于对照品种。 8个新品种及其对照品种可以分为 3个类群。第一类群为 4号、7号、2号、8号、5号和 6号 ,抗旱性较强。第二类群为 1号和 3号 ,抗旱性较弱 ;对照品种为第三类群 ,抗旱性明显较弱。结合其它性状 ,很有希望从第一类群中选择出具有推广价值的杨树新品种更多还原

【Abstract】 By adopting P-V technique,and based on the water parameters in P-V curves, the ordination and cluster analysis of drought resistance in eight poplar clones are carried out.The results show that the drought resistance index(DI)values of tested poplar clones are distinctly bigger than the control;and the DI values of eight clones have following order:No.6>No.2>No.5>No.4>No.8>No.7>No.3>No.1.The tested clones and the control can be classified into three grups:(1)>No.4,No.7,No.2,No.8,No.5 and No.6 with the strongest drought resistance;(2)No.3 and No.1 with moderate drought resistanec;(3)the control with the weakest drought resistance.For clones belonging to the first group group further test seems to be promisting.更多还原