摘要
以遗传背景相同的Wx近等基因系为试验材料,研究不同Wx基因对水稻群体物质生产与产量形成的效应。结果表明:不同Wx基因对水稻产量及干物质生产、籽粒生长具有显著的影响,Wx^b、ωx基因型水稻产量相对较低,偏籼型的Wx^a、Wx^in基因型水稻产量较高,且随着后期施氮量的增加,产量增加相对较大。Wx基因导入后显著增加籽粒的千粒重,Wx^a基因型水稻千粒重最高,Wx^b、Wx^in基因型次之,ωx基因型最小,同时对籽粒的长度和宽度也有一定的作用。不同Wx近等基因系材料干物质积累的差异主要源自于抽穗后的结实期,且随着氮肥水平的增加,差异更为明显,表现为Wx^a、Wx^in基因型水稻干物质积累量较高。茎鞘物质的运转和利用也呈这一趋势,以Wx^a、Wx^in基因型水稻的物质运转能力表现较好,Wx^b、ωx基因型水稻相对较差。这说明Wx^a基因型(偏籼型)水稻有相对较好的结实期物质积累能力和茎鞘物质运转能力,利于产量物质的增加和积累。
Based on Wx near-isogenic lines with the same genetic background as experimental materials,the effects of different Wx genes on the dry matter production and yield of rice population were studied.The results showed that different Wx genes had significant effects on rice yield,dry matter production and grain growth.The yield of Wx^b andωx genotype rice was relatively low,while the yield of Wx^a and Wx^in genotype rice was higher.And the yield increment with the increase of nitrogen application in the later growth stage of Wx^a and Wx^in genotype rice was relatively greater.After the introduction of Wx gene,the grain weight was significantly increased with the highest performance of Wx^a genotype rice.The Wx^b and Wx^in genotype ranked the second,while the smallest wasωx genotype.The difference of dry material accumulation between different Wx near-isogenic lines was mainly originated from the productive stage after heading.With the increaseofnirogenapplicaion Ghediferencewasmoreobvious which showed that the accumulaion of dry matter of Wx^a and Wx^in genotype was higher.The translocation and utilization of substances stored in stem and sheath also showed a consistent trend:the material translocation ability of Wx^a and Wx^in genotype performed better,while the Wx^b andωx genotype were relatively poor.The results showed that rice of Wx^a genotype(partial indica type)had better material accumulaion abiliy and and material translocation ability of stem and sheath,which was beneficial to the increase and accumulation of yield substances.
作者
孙惠艳
张新月
严长杰
张祖建
SUN Huiyan;ZHANG Xinyue;YAN Changjie;ZHANG Zujian(Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Co-Innovation Center for ModernProduction Technology of Grain Crops/College of Agriculture,Yangzhou University,Yangzhou 225009,China)
出处
《扬州大学学报（农业与生命科学版）》
CAS
北大核心
2019年第3期1-8,共8页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
国家重点研发计划项目(2016YFD0300502)
国家自然科学基金资助项目(31371564)
关键词
水稻
WX基因
物质生产
产量
氮肥
rice
Wx gene
material production
yield
nitrogen fertilizer
