Abstract: To study the relationship between main phenotypic traits and yield and quality of Isatis indigotica gemplasm,with 31 different sources of I.indigotica germplasms as materials,cluster analysis of 16 phenotypic traits and correlation analysis of 10 main quantitative traits were conducted,and quality traits concentrations of uridine,guanosine,adenosine and (R,S)-gaoyichun in root were determined.It showed that the variance of the phenotypic traits in 31 I.indigotica germplasms was abundant and they could be divided into three categories at 10.0 of the European distance.The fresh root mass showed an outstanding positive linear correlation with fresh leaf mass and root diameter,the fresh leaf mass showed an outstanding positive linear correlation with leaf number per plant,leaf length and width(P<0.01),so root yield of I.indigotica could be improved by increasing the fresh leaf mass,leaf yield could be improved by increasing leaf length,leaf width and number of leaves per plant.It also showed that there was no direct relationship between phenotypic traits of I.indigotica and quality traits concentration of uridine,guanosine,adenosine and (R,S)-gaoyichun in root.In a word,the genetic relationship of I.indigotica germplasms can be known by cluster analysis of phenotypic traits in different I.indigotica germplasms.The yield of Folium isatidis or Radix isatidis can be increased by selective improvement of the leaf number per plant,leaf size,or root diameter.

Key words: Isatis indigotica Fort., Germplasm, Phenotypic traits, Yield, Quality

摘要： 为研究菘蓝种质主要表型性状与产量及品质的关系，以31个不同来源菘蓝种质为材料，对其16个表型性状进行观测和聚类分析、10个主要数量性状进行相关性分析，并对根部尿苷、鸟苷、腺苷、(R,S)-告依春4个品质成分含量进行测定。结果表明，31个菘蓝种质表型性状变异较为丰富，且在欧式距离10.0处可将其分为三大类；其叶鲜质量、根系直径与根鲜质量，单株叶片数、叶长、叶宽与叶鲜质量均呈极显著（P<0.01）正相关，可通过增加大青叶鲜质量提高单株板蓝根产量，增加叶长、叶宽和单株叶片数提高单株大青叶产量；菘蓝根部4个品质成分含量表明，其表型性状与4个品质成分含量无直接关系。综合分析可知，通过对不同菘蓝种质类型表型性状进行聚类分析可鉴别菘蓝种质间的亲缘关系；对其单株叶片数、叶片大小、根系直径等性状进行选择可针对性地提高大青叶或板蓝根的产量。

关键词: font-family:宋体, ">菘蓝；种质；表型性状；产量；品质