Analysis and evaluation of postharvest quality of fresh garlic seedling varieties in Sichuan area

【Objective】To analyze the quality characteristics of local garlic seedling varieties in Sichuan after harvest,and provide reference basis for breeding and consumption selection of excellent varieties of fresh garlic seedlings.【Method】Thirteen indexes including appearance morphological indicators(single plant weight,plant height,pseudostem length,pseudostem diameter,leaf width) and intrinsic quality indicators(leaf moisture content,vitamin C,crude fiber,solubility protein,soluble sugar,chlorophyll,free amino acids and alliin) were tested and analyzed for postharvest garlic seedlings of nine Sichuan local garlic seedling varieties. The potential correlation between test indexes with correlation analysis was discussed. With cluster analysis,the quality of the varieties was classified. The comprehensive quality of garlic seedling varieties was ranked according to the 7 intrinsic quality characters of the samples by subordinate function analysis.【Result】Statistical analysis showed that the coefficient of variation of 13 tested indexes among varieties was 0.71%-34.75%. Except for leaf moisture content and vitamin C,the coefficients of variation of the other 11 indexes were greater than 10.00%. Local varieties Guangyuan garlic and Chuan No. 1 garlic had the highest single plant weight,up to 89.97 and 91.98 g respectively,which were significantly higher than others(P<0.05,the same below) ;the content of allicin in Leibo garlic and Zhongtiangouya garlic was the highest,up to 19.52 and 21.03 mg/g. There were extremely positive correlation among the three indexes of single plant weigh,pseudostem diameter and leaf width,as well asbetween plant height and pseudostem length(P<0.01,the same below). Plant height and pseudostem diameter were significantly positively correlated. And leaf width and soluble protein content were extremely significantly negatively correlated,plant weight and soluble protein were significantly negatively correlated. The cluster analysis of quality characters showed that all varieties were divided into high-yield varieties and quality varieties,including 2 and 7 varieties respectively. Membership functions were performed on the 7 intrinsic quality indicators of garlic seedling leaves. According to the analysis and ranking,the comprehensive nutritional quality of Jiangyou garlic,Ruanye garlic and Chaoyang garlic varieties was more prominent.【Conclusion】There are significant quality differences among 9 local garlic seedling varieties in Sichuan. Two high-yield varieties(Guangyuan garlic and Chuan No. 1 garlic) and three better quality varieties(Jiangyou garlic,Ruanye garlic and Chaoyang garlic) can be popularized and applied in production as characteristic resources.