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（ＲＩ％）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著高度正相关（ｒ＝０．６７６＊＊～０．７５７＊＊），从而具有较好的重演性；而ＲＩ％与Ｓｇ呈显著正相关（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。
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.
出处
《华北农学报》
CSCD
北大核心
1997年第3期22-29,共8页
Acta Agriculturae Boreali-Sinica
基金
霍英东教育基金会资助
国家自然科学基金
关键词
春小麦
耐热性
筛选
Spring wheat
Heat tolerance
Screening method
