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首页> 外文期刊>Journal of the American Society for Horticultural Science >Sugar and organic acid variations in commercial cantaloupes and their inbred parents
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Sugar and organic acid variations in commercial cantaloupes and their inbred parents

机译：商业哈密瓜及其近亲亲本中糖和有机酸的变化

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Markedly higher average sucrose (58.1%) was recovered from mesocarp tissue of six orange-flesh cantaloupe (Cucumis melo L.) genotypes over three seasons compared to glucose (17.5%) and fructose (25.6%). A significant decrease in sucrose concentration was observed in the fall for all six genotypes, and the glucose (21.2%) and fructose (33.5 %) ratios were also higher in the fall; markedly different than the spring fruit averages. The female inbreds had significantly (P = 0.05) lower glucose, fructose, sucrose, and total sugars than the commercial hybrids. Compared to the male and female inbreds, commercial hybrids had significantly (P = 0.05) higher concentrations of fructose, sucrose and total sugars, but not glucose. Two refractometric digital measures of degreesBrix (degreesBrix-At and degreesBrix-II) in homogenized slurries were positively correlated (r = 0.914; P less than or equal to 0.001), and were also correlated with total sugars (r greater than or equal to 0.839) and sucrose (r greater than or equal to 0.752). degreesBrix of cubes (degreesBrix-cube) was significantly correlated with sucrose and total sugars (r greater than or equal to 0.627). Total sugar was positively correlated with sucrose (r = 0.843; Ps less than or equal to 0.001). Eastern-type U.S. melons had significantly (P = 0.05) higher 'Brix-cube and degreesBrix-At compared to U.S. western shipper-types. Female inbreds were significantly (P = 0.05) lower in mean 'Brix (all three measures) compared to the hybrids and male inbreds, and female inbreds had higher pH than the male inbreds. Western shippers had significantly (P = 0.05) higher pH compared to eastern genotypes. The predominant organic acid in all six genotypes was succinic acid, generally followed by oxalic, citric/isocitric, then malic acid. Succinic acid recovery was significantly higher in all six genotypes harvested in the fall, compared to spring. Eastern genotypes had significantly (P = 0.05) lower organic acids compared to western genotypes. Results indicate that maternal inheritance appears to confer lower sugar accumulating capacity and higher pH, which, is associated with vacuolar acid invertase (AI) and hexose balance. Breeding programs should focus on hybrid vigor derived through accentuating homozygous female inbreds with lower pH and higher capacity for sucrose accumulation, as well as morphological and agronomic traits often carried in the female line.
机译：与葡萄糖（17.5％）和果糖（25.6％）相比，在三个季节中从六个橙皮哈密瓜（Cucumis melo L.）基因型的中果皮组织中回收到的平均蔗糖显着较高（58.1％）。秋季所有六种基因型的蔗糖浓度均显着下降，秋季的葡萄糖（21.2％）和果糖（33.5％）比率也较高;与春季水果的平均水平明显不同。雌性自交系的葡萄糖，果糖，蔗糖和总糖含量显着低于商业杂种（P = 0.05）。与雄性和雌性自交系相比，商业杂种的果糖，蔗糖和总糖浓度显着（P = 0.05）高，但葡萄糖则不高。均质浆液中度Brix的两个折光率数字量度（度Brix-At和度Brix-II）呈正相关（r = 0.914; P小于或等于0.001），并且还与总糖含量相关（r大于或等于0.839） ）和蔗糖（r大于或等于0.752）。立方体的度Brix（度Brix-cube）与蔗糖和总糖（r大于或等于0.627）显着相关。总糖与蔗糖呈正相关（r = 0.843; Ps小于或等于0.001）。与美国西部托运人类型相比，东部类型的美国甜瓜的'白利糖度立方糖度和白利糖度水平显着更高（P = 0.05）。与杂种和雄性自交系相比，雌性自交系的平均'白利糖度（所有三个指标）均显着降低（P = 0.05），并且雌性自交系的pH值高于雄性自交系。与东部基因型相比，西部托运人的pH值显着更高（P = 0.05）。在所有六个基因型中，主要的有机酸是琥珀酸，通常依次是草酸，柠檬酸/异柠檬酸，然后是苹果酸。与春季相比，秋季收获的所有六种基因型的琥珀酸回收率均显着更高。与西部基因型相比，东部基因型的有机酸含量显着降低（P = 0.05）。结果表明，母亲遗传似乎赋予较低的糖积累能力和较高的pH，这与液泡酸转化酶（AI）和己糖平衡有关。育种计划应侧重于通过增强具有较低pH和较高蔗糖积累能力的纯合女性自交系而获得的杂种活力，以及女性系通常具有的形态和农艺性状。

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