盐碱胁迫下白榆苗期遗传变异与优良家系选择  

Genetic variation and selection of fine families of Ulmus pumila L.in seedling stage under saline-alkali stress

作　　者：李庆贱[1] 李悦[1] 陈志强[1] 时瑞亭[1] 张建秋[2] 王国柱[2] 张玉玲[2] 

机构地区：[1]北京林业大学林木花卉遗传育种教育部重点实验室,林木育种国家工程实验室 [2]吉林省白城市林业科学研究院

出　　处：《北京林业大学学报》2012年第3期53-57,共5页Journal of Beijing Forestry University

基　　金："十一五"国家科技支撑计划项目(2006BAD030103)

摘　　要：以8个盆栽当年生白榆家系苗为材料,分6次对其施盐碱溶液,使土壤含盐碱量从0.15%开始,逐渐递增到0.95%。统计每次施盐碱溶液后白榆不同家系叶片受害形态情况,测定施盐碱前和试验结束后的生长指标。结果表明,随着盐碱胁迫的增强,中重度受害率、死亡率、总受害率呈递增趋势,而轻度受害率变化很小。方差分析显示,除轻度受害率外,其他叶片受害形态指标在盐碱浓度和家系因子上差异显著,但盐碱浓度因子对指标变异的贡献比家系因子大。根据盐碱胁迫受害症状和生长形态指标等对白榆各家系的耐盐碱能力进行评价,结果相似,选出2、7号为较耐盐碱家系,4、1、6、5号为盐碱胁迫敏感家系,3、8号为适中耐盐碱家系。Eight ploted family seedlings of Ulmus pumila L. were treated by mixture of Na2CO3 and NaHCO3 for 6 times, and the stress was ranging from concentrations （saline-alkali content in soil） of 0. 15% to 0.95% gradually. Injury characteristics of 8 families under saline-alkali stress were investigated. Growth traits were measured before the saline-alkali treatment and after the end of experiment. Results showed that serious injury ratio, death ratio and total injury ratio increased gradually as the stress strengthened, but light injury ratio changed slightly. Analysis of variance showed that leaf injury characteristic indices but light injury rate had significant difference between different saline-alkali concentrations and families, but the contribution of induce variation of concentration was greater than that of families. Based on injury characteristics and growth traits, the results were similar. The families of 2 and 7 were assessed to be saline-alkali tolerance germplasm ; families 4, 1, 6, 5 were saline-alkali sensitivity germplasm, and the families of 3, 8 were moderate-tolerance germplasm.

关 键 词：白榆 盐碱胁迫 家系 遗传变异 耐盐碱评价 

分 类 号：S718.46[农业科学—林学] S792.19