| 摘要: |
| 以 Seri82× Siete Cerros重组近交系为供试材料 ,对不同高温胁迫环境条件下小麦耐热性的表现以及小麦耐热性的评价方法进行了研究。结果表明 :分期播种能够给春小麦提供全生育期的高温胁迫环境 ;借助塑料大棚人工升温的办法可以模拟大田生产条件下籽粒灌浆期的高温胁迫环境。在这些不同的热胁迫环境中 ,供试材料的产量性状都受到严重影响 ,且在耐热性表现显著差异。产量性状和耐热性的相关分析表明 :正常环境条件下产量性状表现与耐热性之间不存在相关关系。不同热胁迫环境条件下 ,基因型之间产量性状的遗传表达亦存在显著差异 ,并与耐热性呈显著的负相关。可以认为采用热感指数和几何平均产量 2个指标鉴定和评价小麦品种的耐热性 |
| 关键词: 春小麦 重组近交系 高温胁近 耐热性 抗逆育种 |
| DOI： |
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| 基金项目:国家自然科学基金项目资助! (396 70 4 6 2 ) |
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| Performance and Evaluation of Spring Wheat Heat Tolerance |
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| Abstract: |
| Recombinant inbred lines (RIL) derived from spring wheat hybrid between Seri88 and Siete Cerros were used to evaluate differential response to heat stress under different heat stress environments and to identify the method of screening trait of heat tolerance in wheat breeding. The results indicated that both late sowing and heat treatment with plastic shelter could simulate ideal heat stress conditions. In different heat stress treatments, yields and their constituents are significantly reduced, while the RILs are significantly different in response to heat stress. Correlation of yield traits with heat tolerance suggested that there were no relationships between expression of agronomic traits with heat tolerance under non stress conditions, howerer significant difference of response of same genotype to heat stress were observed in different heat stress treatments. Combination of both heat susceptibility index and geometric mean yield per plant (or kernel weight per spike) were suggested to be as selection criteria for the evaluation of heat tolerance. |
| Key words: spring wheat,RIL,heat stress,heat tolerance,heat susceptibility index,geometric mean yield |
