“豫麦50”弱势粒中的各种激素含量仍较高。
Endogenous hormone contents in inferior grains of CV. Yumai 50 were also higher.
在籽粒发育后期，蔗糖含量又有回升，尤其是P早弱势粒；
The sucrose content rose again during latter grain development, especially in weak potential grains of P Zao.
母本105B最终粒重较小，且强弱势粒间粒重差异较小；
The sterile line 105B had a small average grain weight and the difference between superior and inferior grains was small.
强、弱势粒淀粉含量差异显著，强势粒淀粉积累量高于弱势粒。
Starch accumulating amount in superior grains was higher than that in inferior grains.
这说明强势粒与籽粒灌浆有关的基因表达比弱势粒早，强度高。
It suggested that the gene related to grains filling in superior grains expressed earlier and more briskly than that in inferior grains.
强势粒中蔗糖合酶活性明显高于弱势粒，且达到峰值的时间也早于弱势粒。
The sucrose synthase (SuSase) activity in superior grains was higher and peaked earlier than that in inferior grains.
弱势粒直链淀粉、支链淀粉、总淀粉积累速率均在花后20～25天达到峰值。
The accumulation rate of amylose amylopectin total starch in weak grains all reached peaks on20-25th daa .
弱势粒直链淀粉、支链淀粉、总淀粉积累速率均在花后20～25天达到峰值。
The accumulation rate of amylose, amylopectin, total starch in weak grains all reached peaks on 20-25th DAA.
孕穗末期喷施S-07溶液可降低强势粒但提高弱势粒灌浆前期的内源IAA水平。
The application of S-07 solution at the booting stage could decrease the IAA content of vigorous spikelet, but increased that of weak spikelet.
强势粒对弱势粒物质摄取能力的优势，可能是杂交稻籽粒结实率低下的重要原因之一。
It was also observed that the "inter-grain apical dominance" in hybrid rice was stronger than its restorer, which might be one of the main reasons for low seed setting in hybrid rice combination.
由此说明，部分亚杂组合籽粒充实不良的主要原因是弱势粒灌浆启动期滞后与灌浆速率小。
These results show that the main causes of poor grain filling are later filling initiation and lower filling rate of inferior grains.
与水种相比，旱种水稻籽粒中iaa和ZR含量减少，灌浆前、中期ABA含量明显增加，这种差异主要表现在弱势粒上。
The grains of dry-cultivated rice contained less IAA and ZR but more ABA than those of moist-cultivated rice at early and mid grain filling stages, and the differences were mainly in inferior grains.
与水种相比，旱种水稻籽粒中iaa和ZR含量减少，灌浆前、中期ABA含量明显增加，这种差异主要表现在弱势粒上。
The grains of dry-cultivated rice contained less IAA and ZR but more ABA than those of moist-cultivated rice at early and mid grain filling stages, and the differences were mainly in inferior grains.
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