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以大粒小麦品种 86 (79)、中粒小麦品种豫麦 4 1号为材料 ,在河南生态条件下 ,研究了大粒小麦品种生理特点及其与穗粒重的关系 .结果表明 ,大粒小麦品种净同化率高 ,灌浆期叶片叶绿素、总糖、全氮含量高 ,光合速率高 ,茎鞘中总糖、全氮含量高 ,但下降快 ,碳水化合物运输受阻 ,后期氮素相对缺乏 ;大粒品种粒重增长快 ,子粒中蛋白质含量高 ,变化平稳 ,不受子粒积累碳水化合物的影响 ;大粒品种后期灌浆不充分 ,子粒饱满度差 ,子粒中GA3 /ABA与子粒灌浆速率呈显著的正相关 ,而旗叶与子粒中GA3 /ABA的相关性不显著
The physiological characteristics and the relationship between grain weight and grain weight of large grain wheat cultivars 86 (79) and medium grain wheat cultivar Yumai 4 1 were studied under the ecological conditions of Henan Province.The results showed that the net grain yield of large grain wheat cultivars High rate of assimilation, high content of chlorophyll, total sugar and total nitrogen, photosynthetic rate, total sugar and total nitrogen content in stems and sheaths at filling stage, but decreased quickly, blocked carbohydrate transport and relatively lack of nitrogen at later stage; The content of GA3 / ABA in grains was significantly and positively correlated with the grain filling rate, but the content of GA3 / ABA in grains was significantly positively correlated with grain filling rate There was no significant correlation between flag leaf and GA3 / ABA in grain