水稻长日抑制基因 PhyB 基因的多样性及区域适应性初探
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Genetic diversity and regional adaptability of long day suppression genes for PhyB in rice
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    研究长日抑制开花基因的分子遗传机制,是培育适应光周期栽培品种以及扩大水稻种植区域的重要基础。PhyB 基因在长日照条件下抑制水稻开花,然而目前水稻 PhyB 基因的长日抑制分子遗传基础还不清楚。本文选择78份亚洲栽培稻(34份籼稻和44份粳稻)及47份近缘野生种进行测序,对 PhyB 基因的核苷酸多态性、单倍型进行分析,并计算籼稻、粳稻和野生稻群体的遗传多样性。结果显示,PhyB 基因共有28个单倍型,其中有两个高频率的单倍型主要分别存在于两个栽培亚种中。从Network图可以看出栽培稻分为两组(A组和B组),A组包括全部的籼稻和4个粳稻个体,B组包括大部分的粳稻。进一步的亲缘地理学分析结果显示A组栽培稻和B组栽培稻具有明显不同的地理分布格局,A组和B组开花时间的比较结果也表明这两组开花时间具有显著差异。另外,野生稻具有很高的遗传多样性,而且均比两个亚种的多样性高。据此推测 PhyB 基因的两个高频率的单倍型在两个栽培亚种中具有区域适应性。PhyB 基因在栽培稻中有明显的驯化信号,随着水稻种植区域的扩大,为了适应不同的地域环境,进化出其他等位基因和不同地域特有的等位基因,从而导致开花时间对不同地区的区域适应性及多样性。

    Abstract:

    Detailed knowledge of the molecular mechanisms of controlling flowering time will facilitate understanding the adaptation mechanism in cultivated rice and enable breeders to design appropriate genotypes for distinct preferences. Previous studies showed that PhyB suppress flowering in long day (LD) conditions, however, how the genetic variation of PhyB is associated with flowering time in different varieties in rice remains unknown. In this study, we sequenced 78 cultivated rice varieties (34 indica varieties and 44 japonica varieties) and 47 wild relatives of rice for PhyB. We obtained the following results: 28 haplotypes were detected among the 125 accessions, and there were two prevalent haplotypes which mainly existed in cultivated rice. The Network indicated that the cultivated rice could be divided into two groups (group A and group B), in which, group A included all indica individuals and 4 japonica individuals, and group B included the rest of japonica individuals. Further geographical analysis showed that group A and group B had distinct geographic distribution pattern, and the flowering time between group A and group B were significantly different. In addition, the genetic diversity result showed that wild rice population harbored higher genetic diversity than did the two cultivated subspecies (indica and japonica). Thus, we inferred that the two prevalent haplotypes existed in two cultivated subspecies are associated with regional adaptability. PhyB had obvious domestication signals in cultivated rice. It evolved specific alleles to adapt the day time suitable for flowering of rice varieties in different regions.

    参考文献
    相似文献
    引证文献
引用本文

刘莎,郑晓明,冯雳,等.水稻长日抑制基因 PhyB 基因的多样性及区域适应性初探[J].植物遗传资源学报,2017,18(2):283-289.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2016-08-29
  • 最后修改日期:2017-01-03
  • 录用日期:2017-01-03
  • 在线发布日期: 2017-03-14
  • 出版日期:
您是第位访问者
ICP:京ICP备09069690号-23
京ICP备09069690号-23
植物遗传资源学报 ® 2024 版权所有
技术支持:北京勤云科技发展有限公司