【摘要】 白粉病是严重危害我国甜瓜生产的真菌性病害，寻找抗病性强、抗性稳定且品质优良的甜瓜白粉病抗源，并探明其遗传规律，有利于加速甜瓜抗病品种培育。以国外高品质厚皮甜瓜杂交1代中分离得到的高抗白粉病材料XQG（P₁）为抗源，与高感病哈密瓜亲本SM276（P₂）配置六世代分离群体，分析其白粉病抗性遗传规律。结果表明，F₁代表现抗病，但抗性水平低于抗病亲本XQG,F₂代抗感比符合13∶3的分离比例，BC₁P₁全部表现为抗病，BC₁P₂抗感比符合1∶1的分离比例。这说明XQG对甜瓜白粉病P.xanthii 2France的抗性受一对不完全显性基因和一对隐性基因共同控制。更多还原

【Abstract】 Powdery mildew,a fungal disease,seriously damages melon production in China.High and stable powdery mildew resistant melon with good quality and known inheritance will accelerate the breeding of resistant melon varieties.In this study,XQG（P₁）,a high powdery mildew resistance inbred selected from a introduced high-quality melon hybrid,was crossed with a Hami melon parent SM276（P₂）,susceptible to powdery mildew,and generated six populations in order to analyze the inheritance of powdery mildew resistance in the melon.The results showed that F₁ was resistant,but the resistance level was lower than that of the resistant parent XQG.The separation ratio of the resistant and susceptible of F₂ generation was 13∶3.Moreover,all BC₁P₁ showed high disease resistance,and the separation ratio of resistant and susceptible of BC₁P₂ was 1∶1.Together,these results indicated that XQG resistance to powdery mildew P.xanthii 2France was jointly controlled by a partial dominant gene and a recessive gene.更多还原