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利用3个不同类型的两用核不育系,研究了不同海拔高度对两用核不育系育性的影响。结果表明,不同材料在同一海拔高度的育性变化不同,M901S不育期长且稳定,8912S次之,NJ28S较差。不同海拔高度由于存在明显的温度差异,因此对两用核不育系的影响明显不同。其中,±600m的温度变化处于±200m与±800m之间,且倾向于±800m的变化。育性变化±200m和±600m呈不明显的差异,变化趋势一致,±800m的差异较大,±1100m温度过低,对稻株的发育可能不利。我们认为,可选择±200m和±800m为鉴定的两用核不育系育性稳定性的生态代表点,±1100m的鉴定结果可作为参考指标。
The effects of different altitudes on the fertility of two-use genic male sterile lines were studied using three different types of dual-genic male sterile lines. The results showed that the fertility changes of different materials at the same altitude were different. M901S had a long and stable sterile period, followed by 8912S and NJ28S. Because of the obvious temperature difference at different altitudes, the effects on the two-purpose nuclear sterile lines are obviously different. Among them, the temperature change of ± 600m is between ± 200m and ± 800m, and the change tends to ± 800m. Fertility changes ± 200m and ± 600m showed no significant differences, the same trend, ± 800m greater differences, ± 1100m temperature is too low, the development of rice plants may be adverse. In our opinion, ± 200m and ± 800m can be chosen as ecological representative points for the fertility stability of dual-purpose genic male sterile lines. The identification result of ± 1100m can be used as a reference index.