For exploring the biological effect of space environment on different genotype of rice seeds, the cytological effects of M1 generation after space flight were studied. Twelve different genotypes of rice seeds which be...For exploring the biological effect of space environment on different genotype of rice seeds, the cytological effects of M1 generation after space flight were studied. Twelve different genotypes of rice seeds which belong to different climate ecotype （early, medium and late） of indica and japonica were onboard ＂Shenzhou 4＂ spaceship for 162 h. After recovered the total number of mitosis cells and chromosomal aberration were observed. In all the lines the mitotic index （MIs） of space flight are much higher than control, which indicates the stimulate effect of space environment. The cell rate of chromosomal aberration （CRCA） of space flight is also much higher than control, but varies from line to line. It indicates that biological effect of space environment on rice seed dependents not only on flight duration but also on rice genotype. The radiosensitivities of different lines were also discussed according to CRCAs.展开更多
基金Sponsored by the National"863"Program Project (2004AA231071) the Ministerial Level Foundation
文摘For exploring the biological effect of space environment on different genotype of rice seeds, the cytological effects of M1 generation after space flight were studied. Twelve different genotypes of rice seeds which belong to different climate ecotype （early, medium and late） of indica and japonica were onboard ＂Shenzhou 4＂ spaceship for 162 h. After recovered the total number of mitosis cells and chromosomal aberration were observed. In all the lines the mitotic index （MIs） of space flight are much higher than control, which indicates the stimulate effect of space environment. The cell rate of chromosomal aberration （CRCA） of space flight is also much higher than control, but varies from line to line. It indicates that biological effect of space environment on rice seed dependents not only on flight duration but also on rice genotype. The radiosensitivities of different lines were also discussed according to CRCAs.
