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园艺学报 ›› 2022, Vol. 49 ›› Issue (3): 633-640.doi: 10.16420/j.issn.0513-353x.2021-0067

• 研究报告 • 上一篇    下一篇

抗小西葫芦黄花叶病毒的西瓜自交系抗性遗传特征研究

白二俊, 刘莉铭, 郝小苑, 彭斌, 吴会杰, 古勤生*(), 康保珊*()   

  1. 中国农业科学院郑州果树研究所,河南省果树瓜类生物学重点实验室,郑州 450000
  • 收稿日期:2021-03-30 修回日期:2021-11-12 出版日期:2022-03-25 发布日期:2022-03-25
  • 通讯作者: 古勤生,康保珊 E-mail:guqinsheng@caas.cn;kangbaoshan@caas.cn
  • 基金资助:
    国家自然科学基金项目(31701942);中央级公益性科研院所基本科研业务费专项(1610192022105);中国农业科学院科技创新工程项目(CAAS-ASTIP-2022-ZFRI-09);国家现代农业产业技术体系建设专项资金项目(CARS-25)

Analysis on the Resistance to Zucchini Yellow Mosaic Virus in Watermelon Inbred Line 938-16-B

BAI Erjun, LIU Liming, Hao Xiaoyuan, PENG Bin, WU Huijie, GU Qinsheng*(), KANG Baoshan*()   

  1. Henan Key Laboratory Fruit and Cucurbit Biology,Zhengzhou Fruit Research Institute,Chinese Academy of Agricultural Sciences,Zhengzhou 450000,China
  • Received:2021-03-30 Revised:2021-11-12 Online:2022-03-25 Published:2022-03-25
  • Contact: GU Qinsheng,KANG Baoshan E-mail:guqinsheng@caas.cn;kangbaoshan@caas.cn

摘要:

小西葫芦黄花叶病毒(zucchini yellow mosaic virus,ZYMV)严重危害西瓜等葫芦科作物。西瓜938-16-B是对ZYMV产生过敏性坏死反应(HR)的抗性自交系。为研究其对ZYMV的抗性遗传特征,以其为父本与感病亲本H1杂交,构建了包含310个单株的F2群体及BC1群体,通过对亲本、F1、BC1和F2的抗病性鉴定,分析938-16-B的抗性遗传规律。结果发现:温度对西瓜幼苗感染ZYMV后HR的形成有一定影响,低温(< 28 ℃)下比高温(> 30 ℃)更易产生HR反应。在严格控制温度(23 ~ 28 ℃)的条件下对杂交后代群体进行接种抗病性鉴定,结果显示,F2群体的抗、感分离比符合3︰1(χ2= 0.520,P = 0.470);BC1的抗、感比例符合1︰1(χ2= 0.040,P = 0.841),而亲本938-16-B和F1全部抗病,亲本H1全部感病,表明西瓜938-16-B抗ZYMV为单基因显性遗传。

关键词: 西瓜, 小西葫芦黄花叶病毒, 抗性, 遗传规律

Abstract:

Zucchini yellow mosaic virus is a serious emerging virus that has threatened the economically important cucurbits industry in major production areas worldwide. Watermelon inbred line 938-16-B had been identified as resistance to ZYMV in our previous work. It is characterized by hypersensitive response(HR)after infection by ZYMV. Here,we investigated the inheritance of resistance to ZYMV in 938-16-B. In this study,F2 generation with 310 individuals and BC1 generation were generated through crossing 938-16-B with ZYMV-susceptible inbred line H1. According to the segregation ratio of resistance in BC1 and F2 generation,ZYMV resistance in 938-16-B would be established. During the process of inoculation,we found hypersensitive response(HR)would not be induced when the temperature was over 30 ℃,which suggested the resistant gene was temperature-sensitive. Therefore,identification of resistance in the F2 and BC1 population was carried out under the condition of 23-28 ℃. Results showed that,the segregation ratios of resistance to susceptibility in F2 and BC1 were 3︰1 and 1︰1,respectively,which revealed the resistance to ZYMV in watermelon is controlled by a single dominant gene.

Key words: watermelon, zucchini yellow mosaic virus, hypersensitive response, genetic law

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