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从滇四型籼稻“913A”的测交一代中出现大量的不育株,观察表明是“913A”不育系自交结实的后代.经分期播种研究,“913A”具有明显的温敏特性,自交结实的主导因子是温度.日平均温度21.88～24.27℃为育性转换温度,在日平均26.73℃的条件下自交结实率16%,可作温敏“两系”法利用.“913A”是优质软米,配合力强,现测配出4个优质米组合.
A large amount of sterile plants were found in the cross between the indica hybrid rice “913A” of Yunnan Province and the results showed that it was a progeny of “913A” sterile line selfing and fruiting. The “913A” had obvious thermo- The dominant factor of selfing is the temperature.The average daily temperature of 21.88 ~ 24.27 ℃ is the temperature of fertility conversion, self-fertility rate of 16% under the condition of daily average of 26.73 ℃, which can be used as temperature sensitive “two lines” method. "913A Is a high-quality soft rice, with strong, is measured out with four high-quality rice.