石蒜种质资源的数量分类

运用Q聚类法对中国13个不同产地的野生石蒜Lycoris radiata种质资源的28个表型和生理生化性状进行了数量分类研究，并以石蒜变种矮小石蒜L. radiata var. pumila，近缘种玫瑰石蒜L. rosea和红蓝石蒜L. haywardii为对照。结果表明:在结合线L1 = 14.12处，16个分类运算单位（OTUs）按种聚成了3类，石蒜与矮小石蒜聚为第I类；13个产地的石蒜种质又形成3亚类，其中以江苏江宁的石蒜种质（JS1）外形变异最大。R聚类的结果显示花部性状是近缘种间和不同产地石蒜种质资源区分的重要依据。不同产地的石蒜资源在外部形态、生长发育习性、次生代谢产物加兰他敏质量分数方面存在较大差异，石蒜种内具有丰富的遗传多样性，根据其叶片宽度可将石蒜分为细叶型、宽叶型和中间类型。图2表3参13

A quantitative taxonomic study of Lycoris radiata germplasm sources

Based on a field observation，a Q analysis and R analysis from a cluster analysis of 28 morphological and physiological characteristics for 13 of Lycoris radiata germplasm sources from different localities in China were studied with a quantitative taxonomic study using L. radiata var. pumila，L. rosea，and L. haywardii as the outgroups. Results of the Q analysis showed 16 Operational Taxonomic Units （OTUs） classified as three groups at L1 = 14.12. Group I included L. radiata and L. radiata var. pumila. Also，in Group I，three clades were recognized among 13 germplasm specimens of L. radiata；the outer variation in characteristics of Jiangsu，Jiangning 1 （JS1） germplasm was greatest. The R analysis from the cluster analysis showed that flower part features were important for distinguishing relative species and different L. radiata germplasm sources. There were some differences in outer characteristics，growth and development habit，and galanthamine content of different L. radiata germplasm. Thus，in this study according to its leaf width，L. radiata can be classified as a narrow-leaf type，a broad-leaf type，and an intermediate type. ［Ch，2 fig. 3 tab. 13 ref.］