不同来源桃种质果实糖酸组分含量特点的研究

 对桃24个中国地方品种、19个中国育成品种、2个新疆桃栽培品种及5个中国野生种、33个欧美品种和16个日本品种共99份种质的果实糖酸组分含量特点进行了研究。结果表明, 桃果实中的可溶性糖和酸主要是蔗糖和苹果酸, 分别约占总可溶性糖的73%和总酸的60%; 大多数种质中果实内的葡萄糖和果糖含量相近, 但1个中国野生种和部分地方品种果实内的果糖含量较低, 果糖/葡萄糖低于0120; 中国育成品种果实的蔗糖平均含量最高, 而中国野生种果实蔗糖含量则显著低于其他种质; 中国育成品种、日本品种和欧美品种果糖平均含量显著高于中国地方品种和野生种; 中国野生种的总酸含量最高, 其次为欧美品种, 中国地方品种、中国育成品种和日本品种相对较低; 欧美品种果实平均苹果酸和柠檬酸含量高于中国地方品种和育成品种及日本品种。另外, 果实内蔗糖与山梨醇含量呈显著正相关; 苹果酸与柠檬酸之间以及奎宁酸与莽草酸含量之间呈极显著正相关。

Sugar and Acid Contents in Peach and Nectarine Derived from Different Countries and Species

Sugar and acid contents were investigated in 99 peach germplasm,including 24 Chinese local and 19 Chinese bred cultivars,two cultivars of Prunus ferganensis and five wild species,33 European &(American) and 16 Japanese cultivars.Sucrose accounted for about 73% of the total sugar,and malate for about 60% of the total acid contents in fruits.Glucose and fructose contents in fruits were closely correlated and similar in amount in the most germplams,while the fructose content in fruits of one wild species and part of Chinese local cultivars was much lower than the glucose content and their fructose/glucose was inferior to 0.20.Mean sucrose content was the highest in fruits from Chinese local cultivars while the lowest sucrose content was found in the wild species.Fructose content in fruits from European & American,Chinese bred and Japanese cultivars was significantly higher than that from Chinese local cultivars and the wild species.Total acid content of the wild species was the highest and European & American cultivars had significantly higher acid contents than that from other groups.The malate and citrate contents in fruits from European & American cultivars were significantly higher than those from Chinese and Japanese ones.Moreover sucrose content in fruits had positive correlation with sorbitol.There were significant positive correlations between malate and citrate,and between quinate and shikimate in fruits.