【摘要】 1996年经返回式卫星搭载处理的纯系高粱品种晋粮 5号 (CK)的种子经次年播种后 ,获得少量矮秆早熟突变体 (SP3)。此后连续二年播种 ,该突变体矮秆早熟性状稳定。该突变体与未经搭载的对照相比 ,有如下不同之处 :(1 )成熟期缩短 1 5d左右 ,株高降低 40cm。 (2 )穗长增加 3.9cm ,每穗籽粒数比对照多 40 0粒。 (3)SP3平均千粒重为 34g ,对照为 2 7g。 (4)SP3叶片变窄 ,变短 ,增厚 ,叶面积减少了 43%～ 2 2 %。 (5)SP3穗轴长度比对照增加 30 % ,各节间长度比对照缩短了 67%～ 1 5%。 (6)SP3种子中亮氨酸含量比对照增加 1 5% ,可溶性糖含量比对照增加 2 5% ,单宁含量降低了 30 %。更多还原

【Abstract】 Seeds of a pure breeding sorghum ‘Jinliang No.5’(CK) were treated by Chinese Reversal Man_made Satellite in 1996. A dwarf and earliness mutant (SP 3) was obtained by selection from the returned seeds next year. The mutant has showed dwarf and earliness in subsequent 4 years. Comparing the SP 3 with the control, there are many differences as follows: (1) The maturing period of the SP 3 was 15 days earlier and the height of SP 3 plant was 40 cm shorter than the control. (2) The SP 3 ear length inceased 3.9 cm and the kernel number per ear inceased 400. (3) The average 1000_grain weight of SP 3 is 34 g and the control was 27 g. (4) The leaves of SP 3 are shorter, narrower and thicker. So their leaf area deceased 43%～22%. (5) The length of ear axis for mutant increased 36% and the length of internode reduced 67%～15%. (6)The content of leucine in SP 3 seeds increased 15%, soluble sugar of mutant increased 25%,its tannin decreased 30%.更多还原