【摘要】 研究结果表明：从花前标记到整个灌浆期，春小麦９０１ 叶和鞘中１４ Ｃ同化物分配率分别下降２３１ ％ 和７８％ ，陕２２９ 下降了３２１％ 和７７％ 。茎中１４Ｃ 同化物分配率，９０１ 增加了７３ ％ ，陕２２９ 增加了２２０ ％ 。从花前标记、灌浆到成熟，９０１ 穗颖壳１４Ｃ同化物分配率上升了１２２％ ，陕２２９ 上升了８７ ％ 。在花后２１ｄ 前，两品种旗叶１４Ｃ同化物分配率逐渐下降。花后３５ｄ ９０１ 旗叶中１４Ｃ 同化物分配率存在一个高峰，尔后又下降，比花前标记时下降４２ ％ ；陕２２９ 则一直下降，比花前标记下降４５ ％ 。花后同化物转运，陕２２９ 早于９０１ ，陕２２９ 籽粒中１４Ｃ同化物放射性相对高于９０１ 。花前标记的１４Ｃ同化物在９０１ 中有４５ ％ 转运到籽粒中，陕２２９ 中有１１１ ％ 转运到籽粒中去。更多还原

【Abstract】 C assimilate distribution and accumulation at fore\|anthesis in various organs of hybrid spring wheat 901 and its parent Shan 229 were studied by using 14 C tracer techniques.The results showed that from fore\|anthesis stage to filling stage, 14 C assimilate distribution rate in leaves and sheath decreased by 23\^1% and 7\^8% respectively for 901, and decreased by 32\^1% and 7\^7% respectively for Shan 229. 14 C assimilate distribution rate in stems increased by 7\^3% and 22\^0% for 901 and Shan 229 respectively.There was a certain accumulation of 14 C assimilate at ear shell in both cultivars.From fore\|anthesis stage to maturing stage the distribution rate in ear shell raised 12\^2% for 901, and 8\^7% for Shan 229. 14 C assimilate distribution rate in flag leaf in both cultivars gradually reduced within 21 days after anthesis.There was a peak in radioactivity in flag leaf for 901 after 35 days of anthesis.The filling of Shan 229 was faster than that of 901. The radioactivity of 14 C assimilate in grain for Shan 229 was higher than that of 901.4\^5% of 14 C assimilates labelled at fore\|anthesis transported to seeds for 901,and 11\^1% for Shan 229.\;更多还原