69份分蘖洋葱种质资源农艺及品质性状的综合评价

Comprehensive Evaluation of Agronomic and Quality Traits of 69 Accessions of Potato Onion Germplasm Resources

为提高分蘖洋葱种质资源的利用效率,利用变异分析、相关性分析、主成分分析以及聚类分析方法对69份分蘖洋葱种质资源的农艺及品质性状进行综合评价。结果表明,69份分蘖洋葱种质资源11个性状的变异系数范围在6.42%~57.04%之间,其中单球质量的变异系数最大。叶片数、株高、冠幅长、冠幅宽、单球质量、单株产量两两之间均呈极显著正相关,而均与球形指数呈极显著负相关;总黄酮含量与株高、冠幅长、单球质量、单株产量呈显著负相关。主成分分析将分蘖洋葱的11个农艺及品质性状转化为4个主成分,累计贡献率达79.849%;利用主成分值进行综合评价,排名前5的种质分别为M41、M31、M37、M30和M33。系统聚类将69份材料分为4个类群,第Ⅲ和第Ⅳ类群分别具有产量高、生长势强和营养品质较好的特点。

In order to improve the utilization efficiency of potato onion germplasm resources,this paper conducted comprehensively evaluation on the agronomy and quality traits of 69 accessions potato onion germplasm resources by methods of variation analysis,correlation analysis,principal component analysis and clustering analysis.The results showed that the variation coefficient range of 69 accessions potato onion was 6.42%-57.04%.The coefficient variation of single ball quality was the largest among them.Leaf number,plant height,crown length,crown width,single ball quality and single plant yield showed extreme significant positive correlation,while showed a extreme significant negative correlation with spherical index.The total flavonoids content was negatively correlated with plant height,crown length,single ball quality,and single plant yield.Eleven agronomic and quality traits were transformed into 4 principal components by principal component analysis with the cumulative contribution rate of 79.849%.Comprehensive evaluation was conducted by using principal component values.The top 5 germplasm were M41,M31,M37,M30,and M33.The systematic clustering divided the 69 accessions materials into 4 groups,groupⅢandⅣwere characterized with high yield,strong growth vigor and better nutritional quality,respectively.