Quality analysis and evaluation of Citrus aurantium L.wild strains from Hunan province

Quality indexes of 14 Citrus aurantium L.wild strains from Hunan province were analyzed in terms of 12 attributes, including CIE L^*, a^*and b^*values, juice yield, total soluble solid ( TSS) , titratable acid, TSS-acid ratio, narirutin, naringin, hesperidin, neohesperidin, and ascorbic acid. Then principal component analysis ( PCA) and cluster analysis were carried out according to above 12 attributes.Results indicated that the quality indexes of different wild strains of Citrus aurantium L.had significant differences.The PCA results indicated that ‘Yizhang-Ⅰ', ‘Xiangyin-Ⅰ', ‘Changsha-Ⅰ', ‘Hengdong-Ⅰ'and‘Xiangyin-Ⅱ'had better overall quality among the strains tested.Cluster analysis showed that 14 strains of Citrus aurantium L.could be divided into 3 classes: the first class was wild strain ‘Yizhang-Ⅰ'and seedling strain ‘Xiangyin-Ⅰ'with the highest score in PCA, the second class was wild strain‘Changsha-Ⅰ', ‘Hengdong-Ⅰ'and seedling strain ‘Xiangyin-Ⅱ'ranked 3rd-5th in PCA.The result of cluster analysis was consistent with the result of PCA.The three wild strain ‘Yizhang-Ⅰ', ‘Changsha-Ⅰ'and‘Hengdong-Ⅰ'screened with the highest comprehensive quality could be extended in large.