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园艺学报 ›› 2010, Vol. 37 ›› Issue (7): 1073-1078.

• 蔬菜 • 上一篇    下一篇

黄瓜营养体苦味基因Bi的定位

李 曼1,2,龚义勤1,苗 晗2,武 剑2,顾兴芳2,张圣平2,王晓武2,*   

  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中国农业科学院蔬菜花卉研究所,北京100081)
  • 收稿日期:2009-09-12 修回日期:2010-04-29 出版日期:2010-07-25 发布日期:2010-07-25
  • 通讯作者: 王晓武

Fine Mapping of the Foliage Bitterness Gene(Bi)in Cucumis sativus

LI Man1,2,GONG Yi-qin1,MIAO Han2,WU Jian2,GU Xing-fang2,ZHANG Sheng-ping 2,and WANG Xiao-wu2,*   

  1. (1National Key Laboratory of Crop Genetics and Germplasm Enhancement,College of Horticulture,Nanjing Agricultural University,Nanjing 210095,China;2Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China)
  • Received:2009-09-12 Revised:2010-04-29 Online:2010-07-25 Published:2010-07-25
  • Contact: WANG Xiao-wu

摘要: 以黄瓜(Cucumis sativus L.)营养体无苦味的材料9110Gt(bibi)与有苦味的材料9930(BiBi)为亲本,对以两亲本构建的148个株系的RILs群体进行SSR标记的遗传连锁分析,对Bi基因进行初步定位,两侧翼标记SSR19672和SSR00004与Bi基因的连锁距离分别为4.4和3.4 cM。利用两侧翼标记筛选以相同亲本构建的1 815株的F2群体中的重组单株,结合黄瓜基因组测序的结果及生物信息学的知识,在标记区域内开发了31对SSR标记,最终将Bi基因定位在黄瓜的第6染色体上,最近的两侧翼标记SSR02309和SSR00004与苦味基因分别相距1.7和2.2 cM。

关键词: 黄瓜, 营养体, 苦味, Bi基因, 基因定位, SSR

Abstract: A RILs population with 148 individuals derived from a cucumber line 9110 Gt(bibi)and 9930(BiBi)was used to analyze the location of Bi gene. Bi gene was mapped on the linkage group 6, corresponding to chromosome 6 of cucumber. The flanking markers SSR19672 and SSR00004 were linked to the Bi gene with distances of 4.4 and 3.4 cM. An F2 population with 1 815 individuals derived from the same parents was used for screening recombinants for fine mapping of the gene. Recombinant plants were identified by the flanking markers SSR19672 and SSR00004. Based on the whole genome sequence of cucumber,thirty-one SSRs within the region between SSR19672 and SSR00004 were designed and screened for polymorphism between the two parents, which revealed that one of them(SSR02309)was 1.7 cM to Bi gene. The distance between previously identified flanking marker SSR00004 and Bi were 2.2 cM.

Key words: cucumber, foliage, bitterness, Bi gene, gene mapping, SSR

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