目录
摘要Ⅰ
关键词Ⅰ
AbstractⅡ
引言
前言 1
1 材料与方法 5
1.1 试验设计 5
1.2 取样调查 5
1.3 测定指标及方法 5
1.3.1 穗部性状的考察 5
1.3.2 籽粒灌浆参数测定 5
1.3.3 颖果形态观察 5
1.3.4 籽粒淀粉含量测定 5
1.3.5 籽粒可溶性糖含量测定 6
1.3.6 植株各器官干重测定 6
1.3.7 剑叶SPAD值测定 6
1.3.8 茎鞘与上三叶昼夜蔗糖、淀粉含量测定 6
1.4 统计分析 6
2 7
2.1 大穗型水稻籽粒灌浆特性 7
2.1.1 供试材料穗型特征 7
2.1.2 成熟期强弱势粒粒重 8
2.1.3 水稻籽粒灌浆参数 8
2.1.4 灌浆期籽粒淀粉及可溶性糖含量变化 11
2.2 大穗型水稻灌浆期同化物转运特性 13
2.2.1 灌浆期间不同处理下供试材料植株干重变化 13
2.2.2 灌浆期间不同处理下供试材料剑叶SPAD值变化 13
2.2.3 不同处理下供试材料上三叶蔗糖淀粉含量 14
2.2.4 不同处理下供试材料茎鞘非结构性碳水化合物含量动态变化 14
3．1 讨论 15
3．2 结论 16
致谢 16
参考文献： 17
水稻同化物转运特性与弱势粒灌浆的相关性
摘 要
大穗型水稻弱势粒灌浆差是制约产量和品质发展的重要因素，水稻光合同化物转运特性与籽粒灌浆存在密切的关系，明确水稻同化物转运特性与弱势粒灌浆的关系，对于水稻产量与品质的提高具有重要意义。本研究选用两个纯合大穗型粳稻品系水稻（W1844和CJ03），通过不同施肥管理耦合抽穗期疏花方式，调控茎鞘非结构性碳水化合物的累积及分配，以解析大穗型水稻同化物转运特性与弱势粒灌浆的相关性 *51今日免费论文网|www.jxszl.com +Q: ￥351916072￥ 
。试验发现，弱势粒对同化物的吸收利用能力是影响弱势粒灌浆的主要因素，且弱势粒对同化物的吸收利用能力与库大小和品种有关；“库”对同化物的吸收利用能力是影响水稻的同化物合成及转运的重要因素，吸收利用能力越强，水稻茎叶的同化物合成及转运能力越强。
CORRELATION BETWEEN ASSIMILATE TRANSPORT CHARACTERISTICS AND INFERIOR GRAIN FILLING IN RICE (ORYZA SATIVA L.)
ABSTRACT
The poor inferior grain filling of large panicle type rice is an important factor restricting the development of yield and quality. There is a close relationship between the transport characteristics of photoassimilates and grain filling in rice. It is of great significance for the improvement of rice yield and quality to clarify the relationship between the transport characteristics of assimilates and inferior grain filling. In this study, two homozygous large panicle japonica rice lines (W1844 and CJ03) were selected to regulate the accumulation and distribution of nonstructural carbohydrates in stem and sheath by different fertilization management coupled with flower thinning at heading stage, so as to analyze the correlation between assimilate transport characteristics and inferior grains filling in large panicle rice. It was found that the ability of absorption and utilization of assimilates in inferior grains was the main factor affecting grain filling, and the ability of absorption and utilization of assimilates in inferior grains was related to sink size and variety; And the ability of absorption and utilization of assimilates in "sink" was an important factor affecting the synthesis and transport of assimilates in rice. The stronger the ability of absorption and utilization, the stronger the ability of assimilates synthesis and transport in rice stems and leaves.

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