河北省葡萄种质资源圃鲜食葡萄糖酸组分特征解析OA

This study systematically analyzed the characteristics and inheritance patterns of sugar and acid components in table grape germplasms from the Hebei Grape Germplasm Repository.The results showed that fructose exhibited a higher coefficient of variation(CV=42.2%in 2023,CV=59.7%in 2024)than glucose(CV=36.2%in 2023,CV=45.0%in 2024),indicating greater genetic diversity.Among organic acids,malic acid showed the highest coefficient of variation(CV=61.3%in 2023,CV=71.4%in 2024),indicating its key role in shaping fruit acidity diversity.Correlation analysis revealed a highly significant positive correlation between fructose and glucose across years,with strong synergy within the same year(r＞0.89),suggesting that their accumulation is regulated by stable genetic control and potentially shared metabolic pathways.In contrast,interannual stability and interrelationships among organic acids were more complex:tartaric acid and malic acid were strongly genetically controlled,while oxalic acid was more susceptible to environmental influences.Principal component analysis(based on 2023 data)indicated that the"sugar-acid trade-off"was the main driver of germplasm differentiation(PC1 contribution rate:43.2%).Cluster analysis based on sugar and acid composition categorized the germplasms into four groups,among which the high-sugar,low-acid type(Cluster 1,89 accessions)exhibited superior table grape quality,and the low-sugar,high-acid type(Cluster 2,3 accessions)showed potential for specific processing applications.This study provides valuable germplasm resources and a theoretical foundation for flavor quality improvement and breeding of table grapes in North China.