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苦瓜主要品质性状的遗传变异、相关和通径分析
刘政国;龙明华;秦荣耀;王先裕
1.湖南农业大学园艺园林学院;2.广西大学农学院;3.广西大学农学院 湖南长沙410128;4.广西南宁530005
摘要:
对23份苦瓜材料的10个品质性状进行了研究。结果表明,苦瓜维生素C、还原糖、有机酸、果瘤、果色、果刺和苦味遗传变异系数大,遗传力高;水分含量遗传变异系数很小;风味遗传变异系数较小,遗传力低。苦瓜4个内在营养品质之间相关性小,而4个外观品质性状之间关系密切。两个味觉品质与4个内在营养品质之间相关性小,但与4个外观品质之间关系密切。内在营养品质与外观品质之间有一定关系。通径分析提出通过降低果实的苦味和有机酸含量来提高风味品质;通过水分含量和果瘤两性状的直接选择来实现对维生素C的间接选择。
关键词:  苦瓜    品质性状    遗传变异    遗传相关    通径分析
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