摘要
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。
Air- dried seeds of rice variety ZR9 were carried by
high altitude ballcon(HAB)into highaltitude environment(HAE) of 30～38 km above sea level for 8
h.The character expression of SP1,SP2 generation and the correlation heritability(CH)between
SP2’s individual plants and SP3 generea-tion average value were investigated.The results
demonstrated that the SP1’s germination percentageand germination potential of seed and
seed setting percentage were lower than the check’s.Some char-acters of SP1 generation
mutated,and mutation frequency(MF) was 3.39%. More stronger segrega-tion of 9 characters
such as plant height and growth period duration( GPD),were appeared in the SP2generation,The
SP’s mutational spectrum exceeded that in SP1,and MF was increased to 4.31%. The CH
between SP2’s individual plants and SP3 generation average value was high.So it was
consid-ered that the variation induced by HAE may be hereditable.And a new early─
maturing,high grainyield japonica waxy strain was bred.
出处
《航天医学与医学工程》
CAS
CSCD
1995年第3期206-211,共6页
Space Medicine & Medical Engineering
关键词
高空环境
高空气球
水稻
种子
突变
诱变育种
high altitude, environments,
high altitude balloon, rice, seeds,mutations ,heritability heredity,mutation breeding
