亚麻品种主要农艺性状遗传多样性分析  

Genetic Diversity among Agronomic Traits of Flax

作　　者：关虎[1] 王振华 曹禹 魏凌基[1] 李卫华[1] 

机构地区：[1]石河子大学农学院/新疆兵团绿洲生态农业重点实验室,新疆石河子832003 [2]新疆伊犁州农科所,新疆伊宁835000

出　　处：《新疆农业科学》2011年第11期2035-2040,共6页Xinjiang Agricultural Sciences

基　　金：石河子大学动植物育种专项(gxjs2008y205)

摘　　要：【目的】了解亚麻的遗传多样性,有助于种质资源的搜集、管理和利用,有利于对核心种质进行研究。【方法】选择来自不同地区的66份亚麻种质资源,对其株高、蒴果数和千粒重等7个主要农艺性状进行遗传多样性和聚类分析。【结果】遗传多样性指数最高的为分枝数;性状变异系数最大的是株粒重,其后依次为蒴果数和分枝数,最小的为株高。通过聚类分析,把66个品种(系)划分为4类,第I大类群可以作为高产、抗倒伏等育种目标选育的杂交亲本;第II和第III类株高和枝下长均较大,可以作为高秆纤维用亚麻的育种目标的亲本,但由于第Ⅲ类株粒重和蒴果数均较差,做亲本时应慎重;第IV类可以作为矮秆、大粒亚麻育种目标选育的杂交亲本。【结论】亚麻各性状的遗传多样性指数均较大,遗传资源丰富。[ Objective ] The studies of flax genetic diversity not only contributed to the collection, management and utilization of germplasm, but also benefited the conducting of the research of core collection. [ Method] 66 of flax germplasm were selected from different regions, and cluster analysis of the genetic diversity of the plant height, number of capsule and its thousand - grain weight of the 7 main agronomic traits were conducted. [ Result ] The highest number of genetic diversity is branches; The variation coefficient of the grain weight per plant was the maximal, while the number of capsules and branches were the next, the minimum was plant height. According to genetic difference of each characteristic among varieties, the 66 accessions could be classified into 4 categories by cluster analysis. The first g^roup could be used as parents of high - yield and lodging resistance breeding of hybrid parents. The second group and the third group of plant height and branch length were large, which could be used as breeding goals of the parents of high - fiber flax, but due to the poor grain weight and capsule number in the third group, whether it could be used as parents or not should be careful. The fourth group could be used as parents of dwarf and high - yield breeding objectives selection of flax. [ Conclusion ] Genetic diversity index of flax traits are relatively large, rich in genetic resources.

关 键 词：亚麻 农艺性状 聚类分析 遗传多样性 

分 类 号：S563.2[农业科学—作物学]