水稻氮素籽粒生产效率遗传分析  

Genetic Analysis of Nitrogen Grain Production Efficiency in Rice

作　　者：施伏芝[1] 阮新民[1] 倪金龙[1] 罗志祥[1] 苏泽胜[1] 

机构地区：[1]安徽省农科院水稻所安徽省遗传育种重点实验室,安徽合肥230031

出　　处：《安徽农业科学》2007年第36期11792-11794,共3页Journal of Anhui Agricultural Sciences

基　　金：国际科技合作计划项目(2006DFA32990);农业科技成果转化资金项目(2007GB2C300144);安徽省科技厅国际科技合作项目(05088013)

摘　　要：[目的]了解不同氮环境中水稻氮素籽粒生产效率的遗传特点。[方法]采用Dasanbyeo×TR22183杂交,构建了163个家系组成的重组自交系群体(RILs),利用主基因+多基因混合遗传模型,研究施氮、不施氮处理的水稻氮素籽粒生产效率的遗传机制。[结果]两亲本的氮素籽粒生产效率在不同处理中均存在统计学差异,RILs群体的变幅较大,极显著差异,且呈连续变异。水稻氮素籽粒生产效率属两对主基因+多基因控制,在施氮处理下的最适模型为E-1-4模型,主基因表现为显性上位作用,遗传率为51.03%,且两对主基因的加性效应不同;在未施氮处理下的最适模型为E-1-9,主基因表现为抑制作用,遗传率为41.10%。主基因间包括加性和加性上位互作效应。[结论]水稻氮素籽粒生产效率在不同的氮环境中均属两对主基因+多基因遗传控制,主基因遗传率在施氮环境中表现相对较高。[Objective] The research aimed to understand the genetic characteristics of nitrogen grain production efficiency in rice in different nitrogen environment.[Method] A recombinant inbred line（RILs） population composed of 163 lines was constructed by crossbreeding Dasanbyeo with TR22183.The genetic mechanism of nitrogen grain production efficiency in rice in the treatments of nitrogen application and no nitrogen application were studied by using the major gene plus polygene mixed inheritance model [Result] Nitrogen grain production efficiency of 2 parents in different treatments all existed statistical differences.The changing amplitude in RILs population was greater,the differences were extremely significant and it showed continuous variation.Nitrogen grain production efficiency in rice was controlled by 2 major genes plus polygenes.In the treatment of nitrogen application,the optimum model was E-1-4 model,major genes showed dominant epistasis effect,the heritability was 51.03% and the additive effects of 2 major genes were different.In the treatment of no nitrogen application,the optimum model was E-1-9 model,major genes showed inhibitory effect and the heritability was 41.10%.There were additive effect and the additive epistatic interaction effect among major genes.[Conclusion] Nitrogen grain production efficiency in rice in different nitrogen environment was all controlled by 2 major genes plus polygenes and the heritability of major genes showed relatively higher in nitrogen-applied environment.

关 键 词：水稻 氮素籽粒生产效率 遗传模型 

分 类 号：S511[农业科学—作物学]