摘要
以来源于意大利、加拿大和墨西哥的12个硬粒小麦品种(系)为材料,研究了硬粒小麦的单株产量构成因素变化以及对单株产量的相关和通径分析。结果表明,源于墨西哥品系的单株产量极显著高于意大利品种,加拿大品种与墨西哥品系和意大利品种之间产量差异不显著;单株产量构成因素中,有效穗数不同来源品种间无显著差异,穗粒数墨西哥品种极显著高于加拿大和意大利品种,千粒重墨西哥品系则显著低于意大利和加拿大品种。在本试验条件下,不同来源品种的有效穗数与穗粒数和千粒重大多存在着正相关和负相关关系,与单株产量均呈显著或极显著正相关;穗粒数与千粒重均呈显著或极显著的负相关,与单株产量均为正相关;千粒重与单株产量间多为正相关。通径分析表明,不同来源品种产量三因素对单株产量都有正向效应,产量构成因素对单株产量的间接通径系数既有负值也有正值,说明产量构成因素间存在着相互制约和促进的关系;有效穗数对单株产量的贡献在不同来源品种中均较大,说明有效穗数是硬粒小麦品种获得较高产量的基础;墨西哥品系的单株产量构成三因素比较协调。认为墨西哥品系具有较高的产量潜力,引种成功的可能性更大。
We researched the changes of components of yield per plant and correlation and path analysis of yield per plant and its components of durum wheat. The test materials are 12 varieties （lines） of durum wheat introduced from Italy, Canada and Mexico, The results showed that the yield of lines from Mexico was higher than lines from Italy very significantly. There was no obvious difference in yield per plant among varieties from Canada and lines from Mexico and Italy. There was no obvious difference on the number of effective spikes of durum with different sources. The grain numbers per spike of lines from Mexico was higher than lines from Italy and Canada very significantly, but the 1000 grain weight of lines from Mexico was lower than lines from Italy and Canada very significantly.In our research, the number of effective spikes had positive and negative correlation with grain numbers per spike and 1000 grains weight, and it had significant or very significant positive correlation with the yield per plant. Grain numbers per spike had significant or very significant negative correlation with 1000 grains weight, and it had positive correlation with the yield per plant. 1000 grains weight had positive correlation with the yield per plant.The path analysis showed that the number of effective spikes, the number of grains per spike and 1000 grains weight of all varieties had positive effect to the yield per plant, The indirect path coefficient were positive or negative between components of yield and the yield per plant, that means between the yield factors has a inter-promotion and inter-restrictions relations. The number of effective spikes had more contribution to the yield per plant of durum wheat with different sources, which means the number of effective spikes was the base to get high yield. Components of yield of wheat from Mexico were harmonious, so we thought those lines came from Mexico had higher potential to increase yield, the introducing would be successful.
出处
《农业现代化研究》
CSCD
北大核心
2008年第2期231-234,共4页
Research of Agricultural Modernization
基金
引进国外技术、管理人才成果示范推广项目“国外优质小麦”(Y20026200003)
“利用国外抗锈种质资源育成小麦品种的示范推广”(Y20036200001)
关键词
硬粒小麦
产量结构
相关分析
通径分析
durum wheat
components of yield
correlation analysis
path analysis
