中国农业科学 ›› 2010, Vol. 43 ›› Issue (19): 3912-3918 .doi: 10.3864/j.issn.0578-1752.2010.19.002

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

大豆MIPS1基因的定位及其低植酸突变性状CAPS标记的开发

袁凤杰,姜 莹,朱申龙,李百权,付旭军,朱丹华,董德坤,舒庆尧   

  1. (浙江省农业科学研究院作物与核技术研究所)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-10-01 发布日期:2010-10-01
  • 通讯作者: 舒庆尧

Mapping of MIPS1 and Development of CAPS Marker for Low Phytic Acid Mutation in Soybean

YUAN Feng-jie, JIANG Ying, ZHU Shen-long, LI Bai-quan, FU Xu-jun, ZHU Dan-hua,DONG De-kun, SHU Qing-yao
  

  1. (浙江省农业科学研究院作物与核技术研究所)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-10-01 Published:2010-10-01
  • Contact: SHU Qing-yao

摘要: 【目的】定位大豆肌醇-3-磷酸合成酶基因MIPS1,丰富该基因的遗传信息;开发出该基因的特异性分子标记,用于大豆突变体Gm-lpa-TW-1低植酸(LPA)突变性状的辅助选择。【方法】应用公布的大豆基因组数据库和生物信息学分析确定MIPS1候选染色体,利用分离群体中微卫星标记与LPA性状的共分离,定位突变基因MIPS1;根据MIPS1 LPA突变性质和同源基因的序列,开发CAPS分子标记。【结果】大豆中有4个MIPS 基因,其中MIPS1被定位在染色体18上,为注释为Glyma18g02210的大豆基因,其DNA起始序列为1 364 774 bp,位于SSR标记Satt570(3 162 690 bp)和Satt115 (10 422 881 bp)之上,遗传距离分别为5.5和15.2 cM;开发了MIPS1特异性共显性CAPS标记,与LPA性状完全共分离。【结论】本文首次确定了MIPS1所在染色体及其位置,丰富了该基因的遗传信息,开发的CAPS标记可用于Gm-lpa-TW-1 LPA性状的分子标记辅助选择。

关键词: 大豆, 低植酸突变, MIPS1, 基因定位, CAPS标记。

Abstract: 【Objective】 The objectives of the present study are to map the D-myo-inositol 3 phosphate synthase (MIPS EC 5.5.1.4) gene MIPS1 to enrich genetic information of this gene, and to develop molecular markers specific for the MIPS1 mutation for marker assisted selection of low phytic acid (LPA) trait of the mutant line Gm-lpa-TW-1. 【Method】 The candidate chromosome, in which MIPS1 is located, was identified by using soybean whole genome sequence and bioinformatics tools. The results were then verified through classical linkage analysis between microsatellites markers and the LPA trait using the F2:3 population derived from the cross between Gm-lpa-TW-1×Zhongdou 27. Cleaved amplified polymorphic sequences (CAPS) makers specific to the MIPS1 mutation of Gm-lpa-TW-1 were developed based on sequence information of all 4 MIPS genes; the usefulness of CAPS marker was verified using another segregating F2:3 population. 【Result】 Four MIPS genes were identified in soybean and MIPS1 was mapped on chromosome 18 (Linkage Group G) and proved to be the Glyma18g02210 gene. The DNA sequence of MPIS1 starts at 1 364 774 bp and is positioned on the upside of SSR markers Satt570(3 162 690 bp)and Satt115 (10 422 881 bp) at the genetic distance of 5.5 and 15.2 cM, respectively. A co-dominant CAPS marker, which completely segregates with the LPA trait, was developed and verified for the mutant MIPS1 gene of Gm-lpa-TW-1. 【Conclusion】 The present study mapped the MIPS1 on chromosome 18 for the first time, greatly enriched the genetic knowledge of this gene. The CAPS marker developed for the LPA trait of Gm-lpa-TW-1 can be used for marker assisted selection of this important trait and thus can enhance the efficiency of LPA soybean breeding.

Key words: soybean, low phytic acid, mutant, MIPS1 gene mapping, CAPS markers