欧山葡萄杂交优系'140902'抗抽干性及酿酒特性OA

[Objective]This study aimed to explore the physiological characteristics of winter desiccation resistance and the eno-logical quality of the superior grape line'140902',verifying its feasibility for promotion as a high-quality wine grape in arid and low-temperature areas.[Methods]Using one-year-old shoots of'Beihong'and the desiccation-resistant selection'140902'as materials,physiological and biochemical indicators were studied under natural overwintering conditions to comprehensively evaluate and screen for resistance markers.Based on variation detection,candidate genes related to desiccation resistance were identified via KEGG enrichment analysis.Their roles were further explored through real-time fluorescence quantitative(RT-qPCR)analysis and enzyme activity assays.Meanwhile,berry aroma and quality traits were determined using HS-SPME-GC-MS,followed by sensory analysis to evaluate winemaking characteristics.[Results]Under natural overwintering,the desicca-tion rate of'140902'was significantly lower than that of'Beihong'.The shoot desiccation rate correlated significantly with sev-en indicators,including total pectin and cellulose content.Principal Component Analysis extracted four principal components,representing 92.04%of the original data.Membership function analysis showed that the average comprehensive evaluation D-values for'140902'and'Beihong'were 0.641 and 0.534,respectively.KEGG analysis identified three desiccation-related can-didate genes with significantly different expression patterns between the two genotypes.Furthermore,'140902'berries exhibit-ed significantly higher tannins,total phenols,and total acid content than'Beihong',with an aroma profile dominated by green and fruity notes.[Conclusion]Seven indicators,including total pectin,CAT,and POD activity,can serve as key indicators for assessing desiccation resistance.Compared to'Beihong','140902'exhibited superior desiccation resistance and strong wine typicity,making it a promising high-quality selection for arid and semi-arid regions.