11个白杨派无性系抗旱性综合评价

On the Comprehensive Evaluation of Drought Resistance of 11 Poplar Clones

以西北农林科技大学选育的5个I-101(Populus alba)×84K(P.alba×P.glandulosa)的优良杂种无性系(秦白杨1号、秦白杨2号、秦白杨3号、‘02-21-13’、‘02-3-32’)、6个I-101(P.alba)×毛白杨(Poplus tomentosa)的优良杂种无性系(‘03-4-22’‘04-14-15’‘04-17-12’‘07-17-18’‘07-23-23’‘07-30-11’)和3个对照无性系(84K、I-101、毛白杨)为供试材料,在不同程度水分胁迫下,对各无性系生长、生理差异进行分析。对各指标进行相关性分析,筛选适宜的指标,对各无性系抗旱能力进行综合评价。各无性系的大部分指标间存在显著差异,以叶片脯氨酸含量、叶片相对电导率、净光合速率、苗高、单叶面积、生物量为抗旱性综合评价的指标。结果表明,采用TOPSIS法评价各无性系的抗旱能力,抗旱能力较强的为‘02-21-13’‘02-3-32’‘03-4-22’‘04-14-15’‘07-17-18’秦白杨1号秦白杨3号。

Taking five hybrids of I-101(Populus alba)×84K(P.alba×P.glandulosa),six hybrids of I-101× P.tomentosa bred by Northwest A&F University and three control clones(84K,I-101,P.tomentosa)as experimental materials,the growth and physiology of various clones under different water stresses were observed.Correlation analyses between the indices were conducted to screen out suitable indices for the comprehensive evaluation of drought resistance of the clones.There were significant differences among the clones.Indices for the evaluation were the net photosynthetic rate,the single leaf area,seedling height,biomass,osmotic regulation ability and cell membrane permeability.The result of the application of the technique for order preference by similarity to ideal solution(TOPSIS)indicated that the clones with strong drought resistance were ‘02-21-13’,‘02-3-32’,‘03-4-22’,‘04-14-15’,‘07-17-18’,Qin Baiyang-1 and Qin Baiyang-3.