摘要： 以大粒小麦新品系兰考86（79）（源限型）、豫麦18号（库限型）和大穗小麦新品系黄8124（源库互作型）为材料，对其生理特点及其与穗粒重的关系进行了研究。结果表明，源限型和源库互作型品种“源”的形成和发展较库限型品种更为合理，其光合势大，叶面积持续时间长，光合生产率高，叶片光合性能强，粒重增长快，穗部性状优良；子粒灌浆速度前期增加快，后期下降平缓，粒重与灌浆速度呈显著的正相关，而库限型品种这种相关关系不明显。叶片对源限型品种、叶鞘对源库互作型品种、茎秆对库限型品种子粒增重贡献较大。

关键词: 小麦, 源库关系, 生理特点, 穗粒重

Abstract: The research was carried out on the relationships between physiological characteristics and spike kernel weight of different types by using new big kernel wheat strain Lankao 86(79) (source-limiting type)、Yumai 18 (sink-limiting type) and new big spike wheat strain Huang 8124 (source-sink-interacting type) as test materials. The main results was as follows: (1) The sources formation and development of source-limiting type and source-sink-interacting type varieties is more reasonable than sink-limiting type one. They have bigger photosynthetic superiority, longer continued time of leaf area, higher photosynthetic reduction efficiency, stronger photosynthetic property of leaves.(2) Source-limiting type and source-sink-interacting type varieties grain weight increases quickly, their spike characters are superior to sink-limiting type one. (3) Leaves of source-limiting type variety、leaf sheaths of source-sink-interacting type one、stem of sink-limiting type one contribute more to kernel's increasing weight than other organs. (4) Kernel milking speed of source-limiting type and source-sink-interacting type varieties increases quickly in earlier stage and decreases slowly in later stage, it presented significant positive correlation between grain weight and milking speed, but to the sink-limiting type variety, this correlation isn't evident.

Key words: Wheat, Source-sink relationship, Physiological characteristic, Spike grain weight

中图分类号: 

• S512.101