• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bioenergy research >Comparative Relationships and Chromosome Evolution in Switchgrass (Panicum virgatum) and Its Genomic Model, Foxtail Millet (Setaria italica)
【24h】

Comparative Relationships and Chromosome Evolution in Switchgrass (Panicum virgatum) and Its Genomic Model, Foxtail Millet (Setaria italica)

机译：柳枝（（Panicum virgatum）及其基因组模型Foxtail Millet（Setaria italica）的比较关系和染色体进化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A switchgrass (Panicum virgatum L.) consensus map was developed that combined data from two mapping populations and integrated recombination data from both parents of this largely obligate outcrossing species. The consensus map consisted of 1,321 loci and spanned 2,122 cM. An analysis of the distribution of genic and genomic markers across the length of a linkage group showed that genic markers were relatively overrepresented in distal regions, while genomic markers were relatively overrepresented in pericentromeric regions. Furthermore, genic markers located in distal and pericentromeric regions identified orthologs in the genome of the closely related species foxtail millet (Setaria italica (L.) P. Beauv.) at a similar rate, but fewer orthologs were found for genomic markers that mapped to pericentromeric regions compared to distal regions. Because cross-species sequence conservation is largely limited to genes, our data suggest that genomic markers that map to distal regions are more likely to be derived from genic regions than those that map to pericentromeric regions. A comparative analysis between loci on the switchgrass consensus map and their orthologs in the foxtail millet genome showed that the two species varied by at least nine inversions and one reciprocal translocation. Extending the comparative analysis to sorghum demonstrated that the majority of the rearrangements occurred in the foxtail millet genome in the past 13 million years. The reduction in chromosome number from 10 in the Andropogoneae to 9 in the Paniceae was achieved through a complex set of rearrangements involving three ancestral chromosomes orthologous to sorghum chromosomes 6, 8, and 9 and chromosomes III and VII in the lineage leading to switchgrass and foxtail millet. Upon insertion of ancestral chromosome 9 into ancestral chromosome 8, the centromere of the recipient chromosome was lost, and this was accompanied by a loss of repetitive DNA. The switchgrass–foxtail millet comparative map provides a guide of the rearrangements that need to be taken into account when using foxtail millet as a surrogate for switchgrass in genetic analyses.
机译：建立了柳枝consensus（Panicum virgatum L.）共有图谱，该图谱组合了来自两个作图种群的数据和来自该主要专性异交物种的双亲的整合重组数据。共有图谱由1,321个基因座和2122 cM跨度组成。对基因组和基因组标记在整个连锁群中的分布的分析表明，基因标记在远端区域相对过多，而基因组标记在着丝粒区域相对过多。此外，位于远端和着丝粒区域的基因标记以相似的速率鉴定了近缘种狐尾粟（Setaria italica（L.）P.Beauv。）的基因组直向同源物，但针对映射到与远端区域相比，着丝粒区域周围。由于跨物种的序列保守性很大程度上限于基因，因此我们的数据表明，映射到远端区域的基因组标记比映射到着丝粒区域的基因组标记更可能来自基因区域。柳枝consensus共识图谱上的位点与谷子基因组直系同源基因之间的比较分析表明，这两个物种的变异至少有九个倒位和一个倒易位。将比较分析扩展到高粱表明，在过去的1300万年中，大多数重排发生在谷子小米基因组中。通过一系列复杂的重排，涉及到与高粱第6、8、9和9号染色体同源的三个祖先染色体，以及沿谱系延伸到柳枝switch和狐尾的谱系III和VII，实现了将染色体数目从Andropogoneae中的10个减少到Paniceae中的9个。小米。在将祖先9号染色体插入祖先8号染色体时，受体染色体的着丝粒丢失，并且伴随着重复DNA的丢失。柳草-谷子比较图提供了当使用谷子粟作为遗传分析中柳枝的代用品时需要考虑的重排的指南。

著录项

  • 来源
    《Bioenergy research》 |2015年第1期|137-151|共15页
  • 作者

    Guillaume Daverdin; Bochra A. Bahri; Xiaomei Wu; Desalegn D. Serba; Christian Tobias; Malay C. Saha; Katrien M. Devos;

  • 作者单位

    1.Institute of Plant Breeding Genetics and Genomics and Department of Plant Biology University of Georgia Athens GA 30602 USA;

    1.Institute of Plant Breeding Genetics and Genomics and Department of Plant Biology University of Georgia Athens GA 30602 USA 2.Department of Plant Protection and Postharvest Diseases National Agronomical Institute of Tunis Tunis 1082 Tunisia;

    1.Institute of Plant Breeding Genetics and Genomics and Department of Plant Biology University of Georgia Athens GA 30602 USA 5.College of Life and Environmental Sciences Hangzhou Normal University Hangzhou 310036 China;

    3.Samuel Roberts Noble Foundation Inc. Ardmore OK 73401 USA;

    4.Genomics and Gene Discovery Research Unit Western Regional Research Center Albany CA 94710 USA;

    3.Samuel Roberts Noble Foundation Inc. Ardmore OK 73401 USA;

    1.Institute of Plant Breeding Genetics and Genomics and Department of Plant Biology University of Georgia Athens GA 30602 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Comparative genetics Switchgrass Panicum virgatum Foxtail millet Setaria italica Genome evolution Consensus map;

    机译：比较遗传学柳枝Pan狐尾谷Set狗尾草基因组进化共识图谱;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号