论文部分内容阅读
利用高空气球搭载ＺＲ９水稻干种子，在３０～３３ｋｍ高空飘游８ｈ回收后种植，并调查ＳＰ１、ＳＰ２代的性状表现和ＳＰ２单株与ＳＰ１代株系均植相关遗传力。结果表明，ＳＰ１代种子的发芽势和成苗率均降低，并出现了一些性状的突变、突变频率为３．３９％。在ＳＰ１代所调查的株高、生育期等９个性状均出现了较大的分离，突变谱超出了ＳＰ１代，突变频率提高到４．３１％。现代单株与ＳＰ１代株系均值之间具有较高的遗传力，认为高空环境引起的变异是可以遗传的。从变异后代选育出早熟、丰产的晚糯新品系可以证实。因此，高空诱变可以作为诱变育种的一种新途径。
ZR9 rice seeds were harvested with high-altitude balloon, and were planted in high altitude for 30 ~ 33km for 8h before harvesting. The performance of SP1 and SP2 generation lines and the heritability of SP2 and SP1 lines were also investigated. The results showed that the sprouting potential and seedling emergence rate of SP1 seeds decreased, and some traits mutated, the mutation frequency was 3.39%. In the SP1 generation, the nine traits such as plant height and growth period were all separated greatly. The mutation spectrum exceeded SP1 and the mutation frequency increased to 4.31%. There is a high heritability between the average value of the modern single-line and the SP1 generation lines, and the variation caused by the high-altitude environment can be inherited. Breeding from mutated offspring of early maturity, high yield of late waxy new lines can be confirmed. Therefore, altitude mutagenesis can be used as a new way of mutation breeding.