论文部分内容阅读
利用高空气球搭载 ,使粳稻品种中作 59的干种子处于海拔 3 0～ 3 5Km高空 8H后回收种植 ,并对SP1 4代的 60个稳定株系 ,调查了区分籼粳类型有关的 6个性状的变异情况。结果表明 :谷壳苯酚染色反应 ,秧苗 KCl O3 抗性、稃尖茸毛长度、谷粒长宽比、种子萌发天数等均出现连续性变异 ,在变幅的两端 ,可明确区分出具籼特征和粳特征两种类型。而与典型籼稻品种杂交 F1,可育花粉也出现连续性变异 ,变幅在 0 .72 %～96.2 2 %之间。在 60个株系中有 8个株系 ,在所调查的 6项指标上 ,均出现籼型特征 ,有一些株系为籼 -粳中间类型突变。因此认为 ,在空间环境条件下 ,能诱发粳类型突变为籼类型或中间类型突变
Using high-altitude balloon-mounted, the dry seeds of japonica rice cultivar Zhongzuo 59 were planted at altitude of 30 ~ 35 Km above sea level for 8 hours and then planted. Sixty stable lines of SP1 4 generation were selected and six traits related to indica and japonica type were investigated Variation of the situation. The results showed that there was a continuous variation in phenol reaction, seedling KCl O3 resistance, tip length, grain length and width, seed germination days and so on. At both ends of the amplitude amplitude, Japonica characteristics of two types. The F1 hybrids with typical indica varieties, fertile pollen also showed continuous variation, ranging between 0.72% ~ 96.2 2%. Among 60 lines, 8 lines showed indica-type characteristics in all the 6 indicators investigated, and some lines were indica-japonica intermediate type. Therefore, under the conditions of space environment, it can be induced that the japonica type is mutated into an indica type or an intermediate type