Analysis and Comprehensive Evaluation of Agronomic Characters of 93 Varities of Lycium L.
In order to objectively evaluate the diversity of germplasm resources and screen the germplasm with better comprehensive characters,some new varieties of Lycium L.with better comprehensive characters were preliminarily screened.Eight agronomic traits of 93 varities of Lycium L.germplasm resources were analyzed by coefficient of variation,fuzzy mathematical membership function and cluster analysis.The coefficient of variation analysis showed that the coefficient of variation ranged from 5.25%to 73.52%,in which the maximum coeffi-cient of variation was yield per plant,and the minimum was fresh-dry ratio of leaves.The Shannon diversity in-dex ranged from 1.77 to 5.73,in which the maximum Shannon diversity index was ground diameter,and the minimum Shannon diversity index was fresh-dry ratio of stem.Correlation analysis showed that yield per plant was significantly positively correlated with leaf area,leaf fresh-dry ratio,plant height and ground stem(P≤0.05),and significantly negatively correlated with leaf shape index,stem fresh-dry ratio and leaf to stem(P≤0.05).Membership function analysis showed that 9 new varieties of Lycium L.germplasm with better comprehensive characters were selected,namely Z88,Z76,Z100,Z58,Z32,Z54,Z57,Z85 and Z69.Cluster analysis divided the germplasm into five categories.ClassⅠwas characterized by the highest yield per plant,the larger plant height,ground diameter and leaf area,and others,including strains Z88 and Z76.Class Ⅱ was characterized by the largest ground diameter,the larger plant height,leaf shape index and leaf area,and others,including strain Z58 and Z32.ClassⅢwas characterized by the largest leaf area,the larger plant height and leaf fresh-dry ratio,and others,including strains Z57 and Z85.Class Ⅳ was characterized by the largest fresh-dry ratio of leaves,the larger leaf shape index and yield per plant,etc.ClassⅤwas characterized by the largest leaf/stem ratio,the larger leaf shape index,stem fresh-dry ratio and plant height,etc.The 93 varities of Lyci-um L.germplasm resources were abundant.Yield per plant,ground stem,leaf area,leaf fresh to dry ratio and leaf/stem characters were important agronomic traits to evaluate leaf with applications of Lycium L.germplasm.Fuzzy mathematical membership function and cluster analysis method could accurately and reliably evaluate leaf with applications of Lycium L.germplasm resources.
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