CIMMYT不同棱型大麦产量构成因素及其对产量的影响  

Analysis of yield components and the effect on grain yield with different rowed type barley introduced from CIMMYT

作　　者：杨金华[1] 于亚雄[1] 刘丽[1] 程耿[1] 胡银星[1] 程加省[1] 

机构地区：[1]云南省农业科学院粮食作物研究所,云南昆明650205

出　　处：《西南农业学报》2008年第4期920-924,共5页Southwest China Journal of Agricultural Sciences

基　　金：云南省"十一五"麦类科技攻关项目(2006NG10)

摘　　要：对2004年至2007年云南省6个试点共计146品种次不同棱型大麦进行产量构成因素变化及其与产量的相关分析和通径分析。结果表明,不同类型大麦的平均产量是六棱>二棱高秆>二棱矮秆;有效穗二棱矮秆最高且变异系数(c.v.%)最小,六棱最低但c.v.%较大;穗粒数是二棱矮秆最低且c.v.%最小,六棱大麦最高但c.v.%最大;千粒重最高的是二棱高秆且c.v.%最小,六棱大麦的千粒重最低。3种类型大麦3因素与产量的相关性大小都是千粒重>有效穗>穗粒数;3因素间的相关性有正有负。偏相关分析同样表明千粒重与产量的偏相关系数最大,所有材料、二棱矮秆、二棱高秆和六棱大麦千粒重每增加1个单位(g),产量分别增加102.9、68.7、61.8和73.8 kg/hm2;同时二棱高秆大麦穗粒数对增产作用也较显著,穗粒数每增加1个单位(1粒),产量增加86.5 kg/hm2。通径分析表明,产量构成三因素的增加均对产量有正向效应,其中千粒重对产量的贡献在3种大麦类型中都居第1位;二棱矮秆产量三因素对产量的间接效应只有穗粒数和千粒重相互间是正值其余均为负值,二棱高秆和六棱大麦三因素对产量的间接通径系数都为负值。Barley is now becoming a promising crop in Yunnan province due to its priority to bread wheat such as shorter growth duration, resistance to stresses and alternate utilization（ malting or feed）. From 2004 to 2007 ,twenty-two advanced barley lines selected from Internation- al Maize and Wheat Improvement Center（CIMMYT） were put into the Regional Yield Trial in 6 locations with 10-11 lines every year by a run-in and run-out design. After discarding several incomplete data,totally 142 data sets were analyzed to evaluate the yield performance of different rowed barley and the effects of their yield components. The results showed that the average yield was ranked as six rowed barley 〉 two rowed-tall barley 〉 two rowed-dwarf barley, and the Coefficient of Variation （ c. v. % ） ranked the same way. As for the yield compo- nents, the two rowed-dwarf barley had the highest number of spikes per area and the lowest c. v. % ,while the two rowed-tall barley had the highest 1000 grain weight with lowest c. v. % ,and the six rowed barley had the highest grains per spike with high c.v. % but the lowest 1000 grain weight. For each of the three type barley, the simple correlations of three yield components to the yield was the same as 1000 grain weight 〉 spikes per area 〉 grains per spike,while the three correlations of the two rowed dwarf barley were of significant difference,and of the two rowed tall barley were the similar,but the correlation of grains per spike to yield of the six rowed barley was negative. The analysis of partial correlation showed that the coefficient of 1000 grain weight to yield is also the highest one and most correlations were negative among the three yield components. The gain yield of all lines,two rowed dwarf,two rowed tall and six rowed barley would be increased by 102.9,68. 7,61.8 and 73.8 kg/hm2 ,respectively,when the 1000 grain weight increased lg promoted. At the same time for two rowed tall barley,the yield will increase 86.5 kg/hm2 when the grains per spike increase 1 unit,r

关 键 词：大麦(Hordeum vulgare L.) 棱型 产量构成因素 相关分析 通径分析 

分 类 号：S512.3[农业科学—作物学]