粳稻直立穗型基因效应的研究  

Research on Erect Panicle Genetic Effects of Japonica Rice

作　　者：陈书强[1,2] 王嘉宇[1] 薛菁芳[2] 徐正进[1] 陈温福[1] 

机构地区：[1]沈阳农业大学水稻研究所,辽宁沈阳110161 [2]黑龙江省农业科学院水稻研究所,黑龙江佳木斯154026

出　　处：《华北农学报》2010年第6期74-80,共7页Acta Agriculturae Boreali-Sinica

基　　金：国家自然科学基金项目(30370866);教育部高等学校博士学科点专项科研基金项目(20050157001);辽宁省教育厅重点实验室项目(20060753)

摘　　要：利用弯穗型品种丰锦和直穗型品种辽粳5杂交高世代(F14)中分离的一对直立穗型和弯穗型近等基因系(ZF14和WF14)研究了粳稻直立穗型基因对农艺性状的影响。结果发现,直立穗基因(EP)除了使穗型直立外,还具有使植株矮化、穗长变短、叶型直立、叶片变短变宽等作用。它能使一次枝梗上的二次枝梗数增加,从而增加二次枝梗颖花数和着粒密度,达到增加产量的目的。直立穗基因(EP)可能从幼苗开始生长阶段(播种后10 d)就有表达效应,使得幼苗在株高、叶形态和干物质重上表现出差异。内源激素含量上的差异是使近等基因系在形态性状上表现出差异的内在生理原因。Effect of erect panicle japonica gene on agronomic traits were studied using a pair of erect panicle type near-isogenic lines（ZF14 and WF14） derived from high-generation（F14） of curved panicle variety Toyonihiki and erect panicle variety ＂Liaojing 5＂ cross.The results showed that the erect panicle gene（EP） have the effect of not only making panicle type erect,but also making plant height dwarf,panicle length short,leaf posture erect,leaves wide and short and so on.EP increased the number of secondary branch on primary branch,consequently EP raised yield through increasing fertilized spikelet number on secondary branch and grain density.EP may have expression effect from the seedling growth stage（10 d after sowing）.It make seedlings present differences in plant height,leaf shape and dry weight.The inherent physiological causes that NILs made difference in morphological traits were that endogenous hormone contents differenced in each growth stage.

关 键 词：粳稻 近等基因系 直立穗型基因 农艺性状 

分 类 号：S511.03[农业科学—作物学]