Hox genes and the phylogeny of the arthropods
Hox genes and the phylogeny of the arthropods
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DOI：
10.1016/s0960-9822(01)00222-6
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发表时间：
2001-05-15
期刊：
影响因子：
9.2
通讯作者：
Akam, M
中科院分区：
文献类型：
--
作者：
Cook, CE;Smith, ML;Akam, M
节肢动物是动物门中种类最丰富、形态最多样化的动物门之一。一个多世纪以来，节肢动物的进化一直是人们深入研究的课题，但现存的四个节肢动物亚门——螯肢动物、甲壳动物、六足动物和多足动物——之间的关系仍未完全解决。形态学分类学经常将六足动物和多足动物放在一起（无角动物）[1, 2]，但最近的分子研究普遍支持六足动物/甲壳动物分支[2-9]，一组调控基因，即Hox基因，控制节肢动物的节段同一性，Hox基因的序列和功能的比较可以揭示进化关系[10]， 我们使用一系列节肢动物类群的 Hox 基因序列（包括来自基础六足动物和多足动物的新数据）来估计节肢动物的系统发育。我们的数据支持这样的假设，即昆虫和甲壳类动物在节肢动物内形成单一进化枝，排除了多足类动物。他们还表明，多足类动物与螯合物的关系比与昆虫/甲壳类动物进化枝的关系更密切。
The arthropods are the most speciose, and among the most morphologically diverse, of the animal phyla, Their evolution has been the subject of intense research for well over a century, yet the relationships among the four extant arthropod subphyla - chelicerates, crustaceans, hexapods, and myriapods - are still not fully resolved. Morphological taxonomies have often placed hexapods and myriapods together (the Atelocerata) [1, 2], but recent molecular studies have generally supported a hexapod/crustacean clade [2-9], A cluster of regulatory genes, the Hox genes, control segment identity in arthropods, and comparisons of the sequences and functions of Hox genes can reveal evolutionary relationships [10], We used Hox gene sequences from a range of arthropod taxa, including new data from a basal hexapod and a myriapod, to estimate a phylogeny of the arthropods. Our data support the hypothesis that insects and crustaceans form a single clade within the arthropods to the exclusion of myriapods, They also suggest that myriapods are more closely allied to the chelicerates than to this insect/crustacean clade.