【摘要】 以两优培九为对照,研究了超级杂交稻组合P88S/0293的生长发育和产量结构特性。结果表明:P88S/0293比两优培九分蘖发生快,分蘖能力强,最高苗期出现早;株高稍矮,抗倒性好;穗数、穗粒、千粒重较高;总库容量比两优培九高14%,具有更高的产量潜力,更依赖大穗发挥产量优势;但P88S/0293成穗率低于两优培九。对提高P88S/0293成穗率的途径进行了初步探讨。更多还原

【Abstract】 The growth characters and yield formation were studied of P88S/0293, a super rice hybrid of target 2 in super hybrid rice breeding of China. The check combination (CK) was Liangyou Peijiu, a super rice hybrid of target 1. Compared to CK, the results showed:(1)P88S/0293 had faster tillering speed and better tillering ability, earlier maximum tiller date. Its plant stature was shorter and more resistant to lodging.(2)P88S/0293 boasted more panicles per unit area, more spikelets per panicle and heavier 1000-grain weight.Its total sink capacity for yield was 14% more than that of CK, possessing more yielding potential due to its advantage on large panicles.(3)But P88S/0293 had lower productive panicle ratio. The approaches to improve the lower productive panicle ratio were also studied in this experiment.更多还原