甜瓜白粉病新抗源的抗性遗传规律  

Inheritance of a new resistance source for powdery mildew in melon(Cucumis melo)

作　　者：王准 宫国义[2] 柳唐镜[3] 应泉盛 张海英[2] 王绍辉[1] WANG Zhun;GONG Guoyi;LIU Tangjing;YING Quansheng;ZHANG Haiying;WANG Shaohui(College of Plant Science and Technology,Beijing University of Agriculture,Beijing 102206,China;Institute of Vegetable Science,Beijing Academy of Agriculture and Forestry Science,Beijing 100097,China;Guangxi Academy of Agricultural Sciences,Nanning 530007,Guangxi,China;Ningbo Academy of Agricultural Sciences,Ningbo 315040,Zhejiang,China)

机构地区：[1]北京农学院植物科学技术学院,北京102206 [2]北京市农林科学院蔬菜研究所,北京100097 [3]广西壮族自治区农业科学院,南宁530007 [4]宁波市农业科学研究院,浙江宁波315040

出　　处：《中国瓜菜》2022年第4期8-13,共6页China Cucurbits And Vegetables

基　　金：北京市农林科学院科技创新能力建设专项(KJCX20200113);广西壮族自治区八桂学者项目(2016A11);宁波市科技创新2025重大专项(2019B10007)。

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(P_(1))为抗源,与高感病哈密瓜亲本SM276(P_(2))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,F_(2)代抗感比符合13∶3的分离比例,BC_(1)P_(1)全部表现为抗病,BC_(1)P_(2)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。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(P_(1)),a high powdery mildew resistance inbred selected from a introduced high-quality melon hybrid,was crossed with a Hami melon parent SM276(P_(2)),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 F_(2) generation was 13∶3.Moreover,all BC_(1)P_(1) showed high disease resistance,and the separation ratio of resistant and susceptible of BC_(1)P_(2) 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.

关 键 词：甜瓜 白粉病 种质资源 遗传规律 

分 类 号：S652[农业科学—果树学]