Genetic laws, correlation, heterosis of main traits of Cultivars moschata, Chinese pumpkin, were studied by using twenty-four representative inbred lines and hybrids crossed by the inbreds. The results showed that genetic laws of Chinese pumpkin were complex. In same trait, some Chinese pumpkins behaved qualitative character while other Chinese pumpkins behaved quantitative character. Variation coefficients of Chinese pumpkin 7 traits in turn were as followings: fruit shape index, powdery mildew disease index, viral disease index, mass of single fruit, yield, soluble solid content and first fruit node. Yield and powdery mildew disease index of Chinese pumpkin had high heterosis from mid-parent and soluble solid content had low heterosis from mid-parent. There were significant correlations between fruit shape index and first fruit node, yield and mass of single fruit. There were significant negative correlations between fruit shape index and mass of single fruit, yield and viral disease index, viral disease index and soluble solid content. Chinese pumpkins resisted viral disease was 84. 4％ while Chinese pumpkins sensed powdery mildew disease was 81.3％.%选择具有代表性的24个中国南瓜自交系和由这些自交系所组配的杂交组合作样本,对其主要农艺性状的遗传规律、相关性及杂种优势进行分析.结果表明:南瓜主要性状遗传规律较为复杂,同一性状,有些南瓜表现为质量性状,有些南瓜表现为数量性状.中国南瓜7种性状的变异系数大小依次为果形指数、白粉病病情指数、病毒病病情指数、单果质量、产量、可溶性同形物含量、第1坐果节位.产量和白粉病病情指数具有较明显的离中优势,可溶性同形物的离中优辨较低.果形指数与第1坐果节位呈极显著正相关,与单果质量呈极显著负相关.产量与单果质量呈极显著正相关,与病毒病情指数呈极显著负相关.病毒病病情指数与南瓜果实可溶性固形物含量之间呈显著负相关.在供试的中国南瓜中,84.4%抗病毒病,81.3%不抗自粉病.
展开▼
