关键词: 河西走廊, 鲜食葡萄, 质构品质, TPA法, 主成分分析

Abstract: To explore the differences in the texture quality of fresh table grapes produced in the Hexi Corridor region, the texture parameters of 10 fresh table grape varieties, including firmness, crispness, adhesiveness, etc., were measured by texture profile analysis (TPA). Correlation analysis, principal component analysis and cluster analysis were used for comprehensive evaluation of the fruit quality. The results showed that the flesh firmness, chewiness and adhesiveness of Vitis vinifera 'Red Globe' and 'Thompson Seedless' were significantly higher than those of other varieties, while the chewiness, adhesiveness and cohesiveness of 'Guifei Meigui', 'Miguang' and 'Summer Black' were significantly lower than those of other varieties. Correlation analysis indicated that firmness was highly significantly positively correlated with crispness, elasticity, chewiness, adhesiveness and resilience (P＜0.01). Principal component analysis showed that 'Red Globe' and 'Thompson Seedless' had higher scores, while 'Jingyu' and 'Miguang' had lower scores. Cluster analysis divided the 10 fresh table grape varieties into 3 groups at the Euclidean distance of 8.0. In conclusion, 'Red Globe' and 'Thompson Seedless' had excellent texture quality, suitable for long-term storage and transportation, while 'Guifei Meigui', 'Miguang' and 'Jingyu' had poor texture quality and were suitable for local seasonal sales.

Key words: Hexi Corridor, table grapes, texture quality, TPA method, principal component analysis