东方小麦主要农艺性状分析  

Analysis on Main Agronomic Characters in Triticum turanicum Jakubz

作　　者：徐黎黎[1] 李伟[1] 郑有良[1] 

机构地区：[1]四川农业大学小麦研究所,四川都江堰611830

出　　处：《麦类作物学报》2006年第6期15-20,共6页Journal of Triticeae Crops

基　　金：高等院校博士点资金项目(20040626004)

摘　　要：为发掘特异基因资源,对75份来自24个国家的东方小麦主要农艺性状进行了考察与分析。结果表明,供试材料植株较高,平均株高达127.5 cm;籽粒特长,平均粒长达1.03 cm。相关分析表明,千粒重与株高呈极显著正相关,而与穗粒数呈极显著负偏相关,说明株高增加可能导致千粒重增高,但千粒重高的材料其穗粒数相应会减少。主成分分析显示4个主成分(穗密度因子、穗粒重因子、粒数因子、株高因子)对变异的贡献率达85.58%,可作为亲本选择的依据。聚类分析可将供试材料分为四类,其遗传距离远近与地理来源无必然联系。To find special gene resources, the main agronomic characters of 75 accessions of Triticurn turanicurn Jakubz. from 24 countries were studied. The results showed that the plant height of these accessions was high and the grain length was too long, with an average of 127.5cm and 1.03cm, respectively. Correlation analysis of characters indicated that the correlation between 1000-grain weight and plant height reached to extremely significant and positive relation. Accessions with higher plant height had higher 1000-grain weight. However, higher 1000-grain weight would cause the decrease in the number of grains per spike. Principle component analysis showed that the first four main components including spike density, kernel weight per spike, grain number, plant height made the contribution of 85.58% to variation, which offered the basis for the parents selection of wheat breading. All the materials could be divided into four main groups depending on the results of clustering analysis, and the genetic distance of T. turanicurn accessions had certain connections with its geographical distribution, but not inevitable connections.

关 键 词：东方小麦 农艺性状 基因资源 

分 类 号：S512.7[农业科学—作物学] S326