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采用不同类型的不育系材料,与不同恢复系配制的60个杂交组合,以同类型的常规种作对照,进行早、晚两季10小时人工定光处理,分析杂交水稻光温反应特性的形成关系。所得主要结果如下:1.杂交水稻具有多种感光类型,其感光性的形成受双亲(不育系、恢复系)对日长反应的共同作用,表现出双亲的特点。杂交水稻感光性的超亲现象,主要受中稻类型的恢复系影响。2.不同细胞质源的不育系及其所配制的杂交组合,感光性和生育期没有明显差异,说明胞质对 F_1的生育期影响不大。3.杂交水稻具有较强的感温性,但亲本间的感温性差异,对 F_1的影响不明显。4.杂交水稻的短日高温生育期,绝大多数短于双亲平均值,而且短于短的亲本;极少数接近或略超过双亲平均值,倾向于亲本中较短的一方。5.将各种杂交水稻的生育期表现类型进行了分析,对杂交水稻栽培制度的确定,栽培技术措施的制定,组合生育期表现的预测,组合的光温反应型的选配,新三系的选育,地区间三系材料的相互引用等方面,具有一定指导意义。
Different types CMS material formulated with different restorer lines 60 crosses to seed as a control with the conventional type, for early and late autumn given 10 hours of artificial light treatment, to form a reaction analysis of light and temperature characteristics of the hybrid rice relationship. The obtained results are as follows: 1 having a plurality of photosensitive types of hybrid rice, which is formed by a photosensitive parents (CMS restorer line) interacts response to long days, parents exhibits characteristics. Photosynthetic susceptibility of hybrid rice is mainly affected by the type of restorer lines in mid-rice. The different cytoplasmic male sterile lines and their hybrid combinations, there is no significant difference in photostability and growth period, indicating that cytoplasm has little effect on the F 1 growth stage. Hybrid rice has a strong sense of temperature, but the temperature difference between the parents, the impact of F_1 is not obvious. 4. The short-term high-temperature growth period of hybrid rice is shorter than the average of parents, and shorter than the short parent; very few close to or slightly more than the average of parents, tend to the shorter of the parents. 5. The performance of the various types of hybrid rice growth period were analyzed to determine the system of cultivation of hybrid rice cultivation technology to develop measures, a combination of reproduction period of the forecast, a combination of light and temperature type of matching, a new three-line Breeding, inter-regional cross-reference of three materials, etc., has some guiding significance.