鱼腥草种质资源农艺性状综合鉴定评价

Comprehensive Identification and Evaluation of Agronomic Traits of Houttuynia cordata Thunb.Germplasm Resources

为鉴定评价鱼腥草种质资源主要农艺性状,筛选出具有适合湖北种植的潜力鱼腥草种质资源,从全国鱼腥草主产区收集10份鱼腥草种质资源进行田间比较试验,利用变异分析、相关性分析、主成分分析和聚类分析等方法对鱼腥草种质进行综合评价。结果表明,鱼腥草种质资源变异丰富,变异系数在8.96%~61.49%,其中变异系数最大的为分枝数,最小的为地下部茎粗。地上部鲜质量与株高、叶长和叶宽呈极显著正相关,与分枝数呈极显著负相关,地下部鲜质量与地下部茎节间长呈显著正相关,与其他9个性状无显著相关性。主成分分析提取了3个主成分,累计贡献率88.34%。聚类分析将供试材料划分为5个类群,第Ⅱ类7号种质综合性状最优,第Ⅴ类10号即本地栽培种质次之。7号种质可作为生产用种加以利用。

In order to identify and evaluate the main agronomic traits of Houttuynia cordata Thunb.germplasm resources,and to screen out potential H.cordata Thunb.germplasm resources suitable for cultivation in Hubei,ten germplasm resources were collected from the main producing areas in China for field comparative test.At the same time,variation analysis,correlation analysis,principal component analysis and cluster analysis were used to comprehensively evaluate the H.cordata Thunb.germplasm.The results showed that H.cordata Thunb.germplasm had abundant variations.The coefficient of variation ranged from 8.96%to 61.49%,among which the largest one was branching number and the smallest one was underground stem diameter.The aboveground fresh weight was significantly positively correlated with plant height,leaf length and leaf width,and significantly negatively correlated with branching number.The underground fresh weight was significantly positively correlated with the underground internode length,and had no significant correlation with the other nine traits.Three principal components were extracted by principal component analysis with the cumulative contribution rate of 88.34%.The tested materials were divided into five groups by cluster analysis.The germplasm No.7 in categoryⅡhad the best comprehensive traits which could be used as production species,followed by germplasm No.10 in categoryⅤ,namely local cultivated germplasm.