【摘要】 以大粒小麦兰考 86 (79)、中粒小麦豫麦 4 1号为材料 ,在河南生态条件下 ,研究了小麦大粒品种源库特点及其与穗粒重的关系。结果表明 :小麦大粒品种灌浆期叶片叶绿素、总糖、全氮含量高 ,光合强度大 ,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 ;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 ;后期灌浆不充分 ,子粒饱满度差 ,子粒中GA3/ABA与灌浆速度呈显著的正相关 ,而旗叶与子粒中GA3/ABA的相关性不显著更多还原

【Abstract】 The research was carried out on the relationship between source sink characteristics and spike grain weight of big kernel wheat variety by using big kernel wheat variety 86(79) and medium kernel wheat variety Yumai No.41 as test materials.The main results was as follows:(1)The chlorophyll、total carbohydrate and total nitrogen content in leaves of the big kernel wheat were higher at filling stage.The total carbohydrate and total nitrogen in stems was higher,but dropped fastly,the carbohydrate transport was blocked,the nitrogen was lacking at late stage.(2)The grain weight of big kernel wheat increases quickly,the content of kernel protein was higher,varied steadily and wasn′t affected by the accumulation of carbohydrate.(3)Grain filling of big kernel wheat wasn′t sufficient at late stage,the plumpness of seeds is poor.It presented significant positive correlation between the rate of GA 3/ABA in kernel and grain filling rate,but the correlation of rates of GA 3/ABA in flag leaf and in kernels wasn′t significant.更多还原