亚麻种质主要农艺性状主成分分析与综合评价  

The Cluster Analysis and Comprehensive Evaluation of Flax Germplasm Based on Principal Components of Agronomic Traits

作　　者：崔翠[1] 周清元[1] 王利鹃 谭尊飞[1] 龚静[1] 谢旭容 

机构地区：[1]西南大学农学与生物科技学院,重庆400716

出　　处：《西南大学学报（自然科学版）》2016年第12期10-18,共9页Journal of Southwest University(Natural Science Edition)

基　　金：高等学校学科创新引智计划(B12006);重庆市社会民生与创新项目(cstc2015shmszx80026);西南大学博士启动基金(SWU112074);中央高校基本科研业务费专项(XDJK2014C150)

摘　　要：综合评价引进的亚麻品系(种),为亚麻栽培、育种研究和生产利用提供科学依据.以49份亚麻品种(系)为材料,分别于2013-2014年度和2014-2015年度调查其10个主要农艺性状,分析其遗传多样性、估算主要农艺性状的主成分,并以前2个主成分和欧式距离为基础,进行种质资源聚类分析和综合评价.得出49份亚麻种质各主要农艺性状的遗传多样性指数两年变化大于1.00.在两个年度中,49份亚麻种质的10个主要农艺性状前2个主成分累计贡献率分别达到71.94%和72.80%,其中第1主成分为产量及其构成要素,方差贡献率分别达到45.45%和50.07%;第2主成分为株高及纤维工艺长度因子,贡献率分别为25.49%和22.73%.根据品种(系)第1主成分表现,在两年中评选出前10的优良品系,其中6个相同,分别为1349,1348,1340,1343,1347及1341.以第1主成分和第2主成分做二维排序散布图,对49份亚麻品种(系)的产量和纤维长度品质进行了综合评价,鉴定出适宜油用和纤维用亚麻.49份亚麻种质在欧式遗传距离为11.00左右时均可分为4大类,其中第1大类在两年度中分别包含13个和18个品种(系),第2大类分别包含11个和15个品种(系),第3大类均含12个品种(系),第4大类分别包含13个和4个品种(系).通过遗传多样性分析、主成分二维排序和欧式遗传距离分析,较好地评价49个参试亚麻种质的遗传特点及其在两个年度条件下的性状表现,为亚麻品种推广和改良提供了科学依据.Evaluation, research and utilization of crop germplasm resource is an important component of genetic breeding. 49 flax germplasm varieties were collected as a material to study the genetic diversity and to analyze the principal component and cluster in 2013--2014 and 2014--2015. The results showed that the genetic diversity index of agronomic traits changes from 1.11 to 1.42 and from 1.15 to 1.44 under two years for 49 flax samples; the cumulative contribution rate of the first two principal components of the 49 flax varieties reaches 71.94% and 72.80% under two years. Variance contribution rate of the first principal component are the highest of all and be regarded as seed yield component factor, the data were 45.45% and 50.07%, and that of the second principal component were 25.49% and 22.73% which be regarded as plant height and fibre length factor. According to the first principal components of, the top 10 varieties （lines）fine lines in the two years were selected, of which six flax varieties were the same （1349, 1348, 1340, 1343, 1347 and 1341, respectively）. First principal components and second principal components were used to carry out a two dimensional sort of scatter diagram and the yield and fiber length quality of 49 varieties （lines） were comprehensively evaluated. When Euclidean distance genetic level is about 11.00, the 49 flax varieties were classified to 4 groups through cluster analysis under two years. There are 13 and 18 flax varieties respectively in the first group, 1t and 15 flax varieties respectively in the second group, 12 flax varieties respectively in the third group, and 13 and 4 flax varieties respectively in the fourth group. Some of flax varieties under the two years were clustered in the same group, and the results showed that there are a little different genetic distance and ecological adaption to some extent for 49 flax varieties. The genetic characteristics and traits performance of 49 flax germplasm were studied through genetic diversity analysis, principal compon

关 键 词：亚麻 主成分分析 聚类分析 种质资源评价 

分 类 号：S325[农业科学—作物遗传育种]