我国不同时期玉米主要农艺性状与产量变化分析  

Analysis of Agronomic Characters and Yield for Different Periods Maize Hybrids in China

作　　者：李妍妍[1] 景希强[1] 丰光[1,2] 黄长玲[2] 

机构地区：[1]辽宁省丹东农业科学院,辽宁凤城118109 [2]中国农业科学院作物科学所,北京100081

出　　处：《玉米科学》2010年第3期37-42,共6页Journal of Maize Sciences

基　　金："十一五"国家支撑计划项目;北京玉米育种平台项目

摘　　要：利用我国不同时期具有代表性的20个玉米单交种及其32份亲本为材料,采用裂区试验设计,进行产量与主要农艺性状变化的相关分析、通径分析和产量构成主因子分析。结果表明:品种产量和中亲产量随着年代推进逐渐提高,亲本产量与品种产量极显著正相关;产量与穗粗、单株穗干重、单株粒干重、穗轴粗、子粒长、株高、叶片宽、生育期、百粒重、行数和出籽率呈极显著或显著正相关;与穗上叶夹角、雄穗分枝数呈极显著或显著负相关;出籽率、百粒重、穗位高、生育期、穗长、穗行数等对产量增加直接作用最大;穗粗、密度、穗干重、百粒重是产量增加的主要因子。种植密度的提高、株型的改善及果穗性状的优化是玉米产量提高的主要原因。Twenty maize hybrids and thirty-two parents in different periods utilized widely on maize production in China were chose as the materials in the study. Changing trend of hybrids and inbred lines yield, correlation analysis between parent yield and hybrid yield, affecting of agronomic characters to yield were made by split plot design. The results indicated that yield of hybrids and midparents increased gradually with varieties replacement, parents yield and hybrids yield was significant positive relationshi...

关 键 词：玉米 产量 农艺性状 相关分析 通径分析 

分 类 号：S51[农业科学—作物学]