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在灌溉和雨养条件下 ,研究了大粒饱满、大粒不饱满和中粒饱满三种小麦籽粒类型的千粒重对源库结构变化的反应。摘除剑叶和 1/ 2小穗数后 ,极显著减少和增加了千粒重。摘除剑叶后 ,大粒饱满的川麦 2 7和 1137的千粒重减幅较大 ,大粒不饱满的川育 14和 30 9减幅较小 ,中粒的川育 12、88凡 8等减幅也较小。去除 1/ 2小穗数后 ,川麦 2 7和 1137的千粒重增幅较少 ,川育 12、88凡 8等的千粒重增幅较多。中粒的 1189的千粒重在去除剑叶和 1/ 2小穗数后 ,增减幅度均较少。不同品种的千粒重对源库结构变化的不同反应 ,表明其灌浆的生理过程或光合器官间的相互补偿能力有差异。这种差异可能影响它们对环境胁迫的适应性。培育高产、稳产小麦品种 ,千粒重不能太大45～ 5 0 g即可 ;干旱常发的丘陵地区 ,应培育中等粒重 ,即 4 0～ 4 5 g的品种 ,以达到高产、稳产目的
Under irrigation and rainfed conditions, the effects of 1000-grain weight on the structure changes of source sinks were studied in a large grain full, a large grain full and a full grain full grain. After removal of the flag leaves and 1/2 spikelets, the grain weight was significantly reduced and increased. After removal of the flag leaf, the grain weight of Chuanmai 27 and 1137 with a large grain size showed a larger decrease in the 1000-grain weight, and the decrease in the Chuan Yu 14 and 30 9 with a large grain size was smaller with a decrease of 12.88% Smaller. After removing 1/2 spikelet number, the 1000-grain weight of Chuanmai 27 and 1137 increased less, and the 1000-grain weight of Chuan Yu 12 and 88 8 increased more. The grain weight of 1189 in the removal of the flag leaf and 1/2 spikelets, the increase or decrease are less. The different responses of 1000-grain weight to the changes of source library structure indicate that there are differences in the physiological processes of photosynthesis or the mutual compensation ability between photosynthetic organs. Such differences may affect their adaptability to environmental stress. To cultivate high-yield and stable-yield wheat varieties, the thousand-grain weight can not be too large 45-500g. In the drought-prone hilly areas, medium-grain weight, 40-50g varieties should be cultivated to achieve high yield and stable yield