Genomic Novelty at the Vertebrate Ancestor

Genomic Novelty at the Vertebrate Ancestor
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脊椎动物祖先的基因组新颖性

DOI:
10.1002/9780470015902.a0024137
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Shigehiro Kuraku
Shigehiro Kuraku
中科院分区:
--
文献类型:
--
作者:
Shigehiro Kuraku

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脊椎动物群体包括不同的进化谱系,典型的实验室模型脊椎动物仅限于其整个多样性的有限群体(四足动物和硬骨鱼)。包括无颌鱼类在内的仍然缺失的谱系的分子序列信息的积累,现在可以在基因组水平上对脊椎动物分类群的定义提供更深入的见解。最重要的是,所谓的两轮全基因组复制被描述为发生在早期脊椎动物进化中。最近对一些基因家族的分子系统发育分析表明,基因组扩增可能在环口动物(现存的无颌鱼类,包括盲鳗和七鳃鳗)从未来的有颌脊椎动物谱系分离之前完成。除了基因组扩展之外,如果在祖先系统发育重建中深入考虑后来在单个谱系中引入的次要变化,那么脊椎动物祖先基因组内容的关键特征是可以推断的。
The group of vertebrates includes diverse evolutionary lineages, and typical laboratory-model vertebrates are confined to only limited groups (tetrapods and teleost fishes) of its entire diversity. Accumulating information of the molecular sequence for the still-missing lineages including jawless fishes can now provide deeper insights into the definition of the taxon Vertebrata at the genomic level. Above all, the so-called two-round whole genome duplications are described to have occurred in the early vertebrate evolution. Recent molecular phylogenetic analyses for some gene families resulted in a scenario in which the genome expansion might have been completed before the split of the lineage of cyclostomes (extant jawless fishes including hagfishes and lampreys) from the future jawed vertebrate lineage. In addition to this genome expansion, key features of genomic contents of the vertebrate ancestor are inferable, provided secondary changes introduced later in individual lineages are taken into deep consideration in ancestral phylogenetic reconstruction.
更新:七鳃鳗的大脑和垂体激素。
DOI: 10.1016/s1096-4959(01)00333-5
发表时间: 2001
期刊: Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology
影响因子: --
作者:
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DOI: --
发表时间: 2011
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影响因子: 4.4
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发表时间: 2011-06-28
影响因子: 16.6
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