平流层辐射对谷子生长发育及后代性状的影响

平流层辐射对谷子的营养生长及后代性状的变异有显著影响。试验结果表明:经高空气球搭载的谷子,种子发芽势比对照提高21.1％,株高比对照降低6.8cm。叶片长度的生长动态呈双峰曲线,叶片长度和宽度与对照的差值由下到上呈正弦曲线,旗叶的面积、穗重均明显高于对照。SP_2分离群体中产生了各种各样具有隐性性状的突变体,SP_3大穗型株系性状相对稳定,在穗长、穗重、种子蛋白质含量和脂肪含量上表现出有选育价值的稳定变异。

IRRADIATION EFFECT ON GROWTH DEVELOPMENT AND OFFSPRINGS CHARACTER OF MILLET IN THE STRATOSPHERE

A significant influence on vegetative growth and character variation in offsprings of millet by irradiation in the stratosphere were investigated. The experimental results showed that germinating viability increased by 21.1%, plant height reduced 6.8 cm compared with control. The dynamics growth pattern of leaf length was a double-peak curve. The difference in length and width of leaves between control and treatment was shown as a sine-linear curve. Spike weight, spike length and flag leaf size were obviously higher than those of control. Various mutants with recessive traits in SP2 were found. The strains with largerspike were stable in SP3. Significant variations in spike length, spike weight, protein content and fatty acid content were observed.