摘要
为了解西藏黄籽白菜型油菜种质资源，以西藏主要农区采集的16份白菜型黄籽油菜农家品种为材料，采用变异系数、多样性指数、聚类分析等方法对30个表型性状进行多样性分析。结果表明：除叶柄长度、薹茎叶着生状态、分枝习性外的27个表型性状变异类型多样，平均多样性指数达1．840，高于国内白菜型油菜平均水平1．709。变异系数（3．92％～52．84％）也表明了性状变异的丰富性。基于主成分因子综合得分进行离差平方和法聚类分析，取卡方平均距离0．80为阈值，将16份白菜型黄籽油菜分为3个类群，第Ⅰ类角果最长，每果粒数最多；第Ⅱ类分枝部位最高，一次分枝数、有效角果数最多；第Ⅲ类分枝部位最低，主轴有效长度最短、有效角果数最少。此外，白菜型黄籽油菜籽粒以极大型和大型为主，种皮色泽丰富。
To understand the yellow-seed rape collected from Tibet China,variable coefficient and diversity index of 30 phenotypic characteristics of 16 Brassica rapa lines were investigated.Results indicated that except 3 traits （petiole length,attaching pattern of stem-leaf and branching habits）,the average diversity index of the oth-er 27 phenotypic characteristics was 1 .840,which was higher than 1 .709 as the rest of China.The variation coeffi-cient （3.92% to 52.84%）also showed higher diversities.Based on principal component analysis,the ward meth-od cluster analysis was chosen for establishing core collection and the Chi -square average distance was 0.80. These 16 different yellow-seed lines were divided into 3 groups：Group Ⅰ the longest pod-length and the most seed numbers per pod;Group Ⅱthe highest branch height,the most primary branches and effective pod numbers;Group Ⅲ the lowest branch height,the shortest effective blot length and the least effective pod numbers.In addi-tion,the seed sizes of these yellow-seed materials were extremely large,and the colors of seed coat were rich.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
2014年第4期461-468,共8页
Chinese Journal of Oil Crop Sciences
基金
国家自然科学基金(31160292)
关键词
黄籽油菜
农家品种
表型性状
多样性
Yellow-seed rape
Local variety
Phenotype characteristics
Diversity
