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园艺学报 ›› 2012, Vol. 39 ›› Issue (3): 574-580.

• 研究报告 • 上一篇    下一篇

甜瓜抗蔓枯病基因Gsb-4 的分子标记

王红英,钱春桃,娄丽娜,娄群峰,张永兵,伊鸿平,吴明珠   

  1. 1南京农业大学园艺学院,作物遗传与种质创新国家重点实验室,南京 210095;2新疆农业科学院,哈密瓜研究中心,乌鲁木齐 830000
  • 出版日期:2012-03-25 发布日期:2012-03-25

A SSR Marker Linked to Gsb-4 Loci Resistance to Gummy Stem Blight in Melon

WANG  Hong-Ying, QIAN  Chun-Tao, LOU  Li-Na, LOU  Qun-Feng, ZHANG  Yong-Bing, YI  Hong-Ping, WU  Ming-Zhu   

  1. 1College of Horticulture,State Key Laboratory of Crop Genetics and Germplasm Enhancement,Nanjing Agricultural University,Nanjing 210095,China; 2 Center of Hami Melon,Xinjiang Academy of Agricultural Sciences,Urumchi 830000,China
  • Online:2012-03-25 Published:2012-03-25

摘要: 以甜瓜(Cucumis melo L.)抗蔓枯病自交系PI482398(含抗蔓枯病基因Gsb-4)和感病自交系‘白皮脆’以及它们的F1、BC1P1、BC1P2、F2 群体为材料,苗期进行蔓枯病菌(Didymella bryoniae)接种鉴定,结果表明甜瓜抗蔓枯病基因Gsb-4 为单显性遗传。利用集团分离分析法(bulked segregant analysis,BSA)对89 对SSR 引物进行筛选,引物CMTA170a 在抗性材料中可扩增出约为120 bp 的条带,并与抗性基因Gsb-4 表现出连锁关系。统计了CMTA170a 在118 个F2 单株上的多态性,并利用MAPMAKER/Exp version 3.0b 软件进行了计算,其与Gsb-4 的遗传连锁距离为5.14 cM。

关键词: 甜瓜, 蔓枯病, Gsb-4, SSR

Abstract: Segregating population consisting of BC1F1,BC2F1 and F2 were generated by crossing the resistant inbred line PI482398[male parent,containing gene the Gsb-4 resistant to gummy stem blight(GSB)]with the susceptible inbred line‘Baipicui’(female parent). The resistance of segregating population and parental lines were evaluated by inoculating spore isolates of GSB at seeding stage. The results indicated that resistance to GSB in PI482398 is controlled by a single dominant gene. The bulked segregant analysis(BSA)was employed to screen the resistant and susceptible DNA pools with 89 pairs of SSR primers as tool. An unique 120 bp fragment was amplified in resistant materials with the primer CMTA170a. The polymorphic patterns of CMTA170a in the 118 individuals of F2 were scored and then calculated by the software of MAPMAKER/Exp version 3.0 b. The results showed that the genetic distance between CMTA170a and Gsb-4 is 5.14 cM.

Key words: melon, gummy stem blight, Gsb-4, SSR

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