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首页> 外文期刊>American Zoologist >Comparative analysis of Hox gene expression in the polychaete Chaetopterus: Implications for the evolution of body plan regionalization
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Comparative analysis of Hox gene expression in the polychaete Chaetopterus: Implications for the evolution of body plan regionalization

机译：cha鱼Hox基因表达的比较分析：对人体计划区域化的演变的启示。

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摘要

The Hox genes are widely regarded as candidates for involvement in major evolutionary changes in body plan organization. We examine Hox gene expression data for several taxa, in relation to recent work on the polychaete annelid Chaetopterus. The work in Chaetopterus shows the basic conservation of colinearity of anterior expression boundaries seen in other groups. It also reveals novel patterns including early expression in the larval growth zone and later formation of posterior boundaries that correlate with morphological transitions in tile polychaete body plan. The polychaete gene expression pattern is compared with those of Hox gene homologs in other taxa to reveal differences that represent evolutionary changes in Hox gene regulation between lineages. Correlations between Hox gene expression differences and morphological differences are examined, focussing on a number of cases in which posterior Hox gene expression boundaries correlate with morphological transitions. Differential regulation of these posterior expression boundaries is proposed as a possible mechanism for changes body plan regionalization.
机译：Hox基因被广泛认为是参与人体计划组织重大进化变化的候选基因。我们检查了有关多毛类无脊椎动物Chaetopterus的最新研究的几种分类单元的Hox基因表达数据。 Chaetopterus的工作显示了其他群体中前表达边界的共线性的基本保留。它也揭示了新颖的模式，包括在幼虫生长区的早期表达和后期边界的后形成，这些后边界与瓦多壳动物身体计划中的形态转换有关。将多毛gene基因表达模式与其他类群中的Hox基因同源物进行比较，以揭示代表谱系之间Hox基因调控进化变化的差异。研究了Hox基因表达差异与形态差异之间的相关性，重点研究了后Hox基因表达边界与形态转变相关的许多情况。这些后表达边界的差异调节被提议为改变身体计划区域化的可能机制。

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