Yield Formation Characteristics of Transgenic Rice Strains with Different Pro-tein Contents in Grains
Yield Formation Characteristics of Transgenic Rice Strains with Different Pro-tein Contents in Grains
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不同籽粒蛋白质含量转基因水稻品种的产量形成特性
DOI：
10.3724/sp.j.1006.2013.01266
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Lijun Liu
中科院分区：
文献类型：
--
作者：
Kang;Yiwei Xiong;Lingming Ge;Hao Zhang;Zhiqing Wang;Jianchang Yang;Lijun Liu
水稻籽粒蛋白质含量（PC）与籽粒产量的关系一直没有明确的认识，本研究以日本晴及其5个不同PC的转基因品系为材料，在大田栽培条件下，研究了它们的产量形成特性，主要结果有2个：（1）在相同施氮量下，籽粒蛋白质含量高的品系籽粒产量低，籽粒充实率与蛋白质含量呈极显著负相关，籽粒中的蛋白质含量和籽粒产量显著增加，产量的增加主要依赖于穗数和每穗粒数的增加。(2)抽穗前积累的干物质少，抽穗后叶片功能期相对较短，光合速率低，灌浆结实期茎秆中的干物质和非结构性碳水化合物向籽粒转运率低，引起结实率下降，是导致籽粒蛋白质含量高的水稻株系产量降低的重要生理原因。;
Relationship between protein content(PC) in grains and grain yield in rice has not been clearly understood.Nipponbare and its five transgenic strains with different PCs in grains were used in the study to investigate their yield formation characteristics under the condition of field cultivation.There were two main results:(1) Under the same nitrogen amount,grain yields were lower in strains with higher PC in grains.Filled grain rate was very significantly and negatively correlated with PC in grains.With an increase in N fertilizer,PC in grains and grain yield significantly increased and the increase in yield was mainly dependent on the increase in panicle number and grains per panicle.(2) Under the same nitrogen amount,the strains with higher PC had less dry matter accumulation before heading stage,shorter functional period and lower photosynthetic rate of flag leaves after heading stage and lower apparent translocation amounts of dry matter and non-structure carbohydrates(NSC) from stems to grains during grain filling stage,leading to lower filled grain rate,which is the possible physiological reason for lower yield in those strains.