棱角丝瓜霜霉病抗性遗传分析
Analysis of Resistance Heredity in Ridgegourd to Downy Mildew
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摘要: 采用6×6完全双列杂交,按Hayman模型对丝瓜霜霉抗性进行分析研究结果表明:抗性的一般配合力和特殊配合力均重要,该性状适合“加性-显性”模型:以加性效应为主,表现为不完全显性,显性基因比例较高,狭义遗传力hN^2=69.63%;加性基因至少为4对。Abstract: The resistane heredity of Ridgegourd downy mildew was studied by a diallel cross arnong six culivare. The results showed that both general companing ability and specifil companing ability were important to resistance; the heredity of resistance could be explained by the additive dominative genehcal model. The ratio of dominant gene by recessive alleles, heritability in narrow sense was 69. 63%. The least number of additive gene was 4.