温光敏两系杂交小麦云杂5号丰产性、稳产性及产量构成因素分析  

Analysis of productivity,stability and yield components for thermo-photo sensitive two-line hybrid wheat Yunza5

作　　者：刘琨[1] 杨和仙[1] 李绍祥[1] 田玉仙[1] 杨木军[1] 顾坚[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5期1240-1243,共4页Southwest China Journal of Agricultural Sciences

基　　金：云南省发改委高新技术产业化项目(云计高技〔2003〕1413号);云南省科技厅攻关项目(2006NG10)

摘　　要：利用2002年至2004年云南省温光敏两系杂交小麦新组合区域试验资料,对云杂5号的丰产性、稳产性及产量构成因素进行了分析。结果表明:云杂5号产量的变异系数和回归系数均小于对照品种,因此具有较好的稳产性;各产量构成因素的变异系数大小依次为:有效穗(c.v.%=9.77)>穗粒数(c.v.%=9.06)>千粒重(c.v.%=2.99);与产量相关程度为:千粒重(r3y=0.9323)>有效穗(r1y=0.8821)>穗粒数(r2y=0.7616);对产量的直接影响为:千粒重(P3y=0.4895)>有效穗(P1y=0.4715)>穗粒数(P2y=0.1350)。因此云杂5号的优化高产栽培措施应以调控有效穗数为主,兼顾穗粒数和千粒重,以达到高产目标。Using data of regional trial of thermo-photo sensitive two-line hybrid wheat in Yunnan province from 2002 to 2003, the productivity, stability and yield components of Yunza5 were analyzed with variation coefficient, regression coefficient, correlation analysis and path analysis. The results showed that the values of variation coefficient and regression coefficient in yield of Yunza5 was less than that of CK, suggesting Yunza5 was better in stability and adaptability compared with the CK. The values of variation coefficient of yield components were sequenced as follows ： the number of effective ears（ c. v. % = 9.77 ） 〉 grains per ears（ c. v. % = 9.06 ） 〉 1000-grain weight（ c. v. % = 2. 99）. The values of correlation degree between yield and yield components were：1000-grain weight（ r3y = 0. 9323 ） 〉 the number of effective ears （ r1y = 0. 8821 ） 〉 grains per ears （ r2y = 0.7616 ）. The direct effect of yield components on yield was： 1000-grain weight （ P3y = 0.4895 ） 〉 the number of effective ears （ P1y = 10.4715 ） 〉 grains per ears （ P2y = 0. 1350）. Therefore, the key to high yield cultivation of Yunza5 is adjusting and controlling the number of effective ear,then giving consideration to grains per ears and 1000-grain weight as well.

关 键 词：温光敏两系杂交小麦 变异系数 回归系数 相关分析 通径分析 

分 类 号：S512.19[农业科学—作物学]