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对当前生产上大面积应用的27个杂交籼稻组合进行高温处理,各组合的结实率均出现不同程度的降低,降幅均达极显著水平,其中结实率降幅小于40%且结实率大于60%的组合有11个,仅占总组合数的40.7%。减轻和避免水稻生产中的高温危害,品种(组合)的选择仍是关键措施之一。研究结果还表明:杂交组合的耐热性与配制组合的双亲有关。
The 27 hybrid indica rice combinations, which are widely used in large-scale production at present, were treated at high temperature. The seed setting rate of each combination decreased to some extent, with a significant decrease, of which the seed setting rate was less than 40% and the seed setting rate was more than 60% There are 11 combinations, only 40.7% of the total number of combinations. To reduce and avoid the high temperature damage in rice production, the selection of varieties (combination) is still one of the key measures. The results also show that the heat tolerance of the hybrid combination is related to the combination of the parents.