芝麻杂交种生长动态优势的研究

本试验探讨雄性不育二系杂交种豫芝９号生长动态优势，以以亲和豫芝４号为对照，用Ｌｏｇｉｓｔｉｃ生长方程描述其器官生长及干物质积累等１０个怀状的增长过程。比较结果表明，豫芝９号生长发育过程具有的前快后缓有效生长量大的特点。前期持续时间短、中期各器官生长及干物质合成速度愉，形态建成早。各器民干重的ＧＲ１、ＧＲ２和ＧＲｇ与产量显著上关。生长后期即灌浆成熟期持续时间长，根系与生殖器这干物质积累快，盯应ＧＥ３

Studies on the Heterosis of the Dynamic Growth of Hybrid Sesame(Sesamum indicum L. )

Four materials, one hybrid and its two parents and one control variety, were used in this study. The process of growth and dry matter accumulation in different organs were described with logistic growth equations. The result showed that the hybrid developed faster in earlier stages of growth and slower in later stages. Comparing with its parents and the control, the early stage D1 of the hybrid was shorter, The dry matter accumulation rate was faster in GR1, GR2 and GR8 periods. The dry weight of various organs in G1 , G2 and G8 periods were significantly correlated with the yield. But the Grain-filling Stage D3 of the hybrid lasted longer. In GR3 and GRr periods, the dry matter accumulation of the root system and the reproductive organs was faster and they were significantly correlated with the yield. The growth of the vegetative organs of the hybrid, however, was significantly slower than that of the parents and the control. All these are favourable to the formation of yield.