不同水稻品种(组合)籽粒灌浆特性的比较

Comparison of grain filling characteristics of various rice varieties(combinations)

以不同籽粒充实度的亚种间杂交稻两优培九、品种间杂交稻汕优63和常规稻武育粳3号为材料,用Richards方程分析它们灌浆特性之间的差异。结果表明:籽粒充实度好的武育粳3号的强、弱势粒的起始生长势、最大灌浆速率和平均灌浆速率差异不明显,表现为强、弱势粒灌浆接近同步;籽粒充实度差的两优培九、汕优63的强、弱势粒的起始生长势、最大灌浆速率和平均灌浆速率差异显著,表现为典型的异步灌浆型。籽粒充实度差的品种(组合),灌浆前、中期弱势粒中蔗糖含量高于强势粒,表明同化产物供应量不是限制籽粒充实的主要因子,充实度差可能与其本身的库活性或其他因素有关。

Further improvement in rice grain filling depends,to a large extend,on our understanding on the physiological and biochemical processes of grain filling in rice.The characteristics of grain filling were analyzed by Richards Equation,using inter-subspecies hybrid rice combinations,Liangyoupeijiu,intervarietal hybrid rice,Shanyou 63,and conventional rice,Wuyujing 3,as experimental materials.For variety with good grain filling,the differences in the initial growth potential,maximum grain filling rate and mean ...