摘要： 利用51份春小麦材料对3种耐热性方法进行了研究评价。供试材料在田间通过晚播计算各基因型的穗粒重感热指数（Se）或于籽粒灌浆期用塑料简棚进行遮盖处理并计算千粒重感热指数（Sg）评价其耐热性；而在室内采用膜热稳定性测定方法，以相对热损伤率（R1%）大小评价基因型的耐热性。相关分析表明：Se在年际间和年份内的相关系数均呈极显着高度正相关（r=0.676~0.757）,从而具有较好的重演性；而RI%与Sg呈显着正相关（r=0.328）说明基因型的膜热稳定性大小能在一定程度上较好地反映其田间的耐热性表现。上述方法指标将在今后的耐热性研究中具有一定的应用价值。
关键词:
春小麦,
耐热性,
筛选方法
Abstract: Using 51 genotypes of spring wheat,three screening methods and indices for heat tolerance were investigated and appraised in this study. In field,genotypes were postponed to plant or sheded with transparent plastic film in filling period. The susceptibility index of each genotype,based on ear grain weight(Se)or 1000 grain weight(Sg),was calculated to evaluate its heat tolerance. Under room conditions,the membrane thermostability,expressed as relative injury(RI),of seedlings of each genotype was tested.Analysis of correlation showed that the correlated coefficients of Se between the years and within the years were positive and highly significant (r=0.676~0.757),which indicated that Se was an indicator of good repeatibility,and that the correlation between RI and Sg(r=0.328) was significantly positive,which indicated that the membrane thermostability of genotypes was a better response to heat tolerance in field in a certain degree. On the results above the methods used here were suitable for the identification of heat tolerance in spring wheat in the future.
Key words:
Spring wheat,
Heat tolerance,
Screening method
中图分类号:
徐如强, 孙其信, 张树榛. 春小麦耐热性的筛选方法与指标[J]. 华北农学报, 1997, 12(3): 22-29. doi: 10.3321/j.issn:1000-7091.1997.03.005.
Xu Ruqiang. Screening Methods and Indices of Heat Tolerance in Spring Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1997, 12(3): 22-29. doi: 10.3321/j.issn:1000-7091.1997.03.005.