An Amphioxus Emx Homeobox Gene Reveals Duplication During Vertebrate Evolution
نویسندگان
چکیده
منابع مشابه
An amphioxus homeobox gene: sequence conservation, spatial expression during development and insights into vertebrate evolution.
The embryology of amphioxus has much in common with vertebrate embryology, reflecting a close phylogenetic relationship between the two groups. Amphioxus embryology is simpler in several key respects, however, including a lack of pronounced craniofacial morphogenesis. To gain an insight into the molecular changes that accompanied the evolution of vertebrate embryology, and into the relationship...
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The phylogenetic relationships of 21 murine Antp-class (Drosophila mutation Antennapedia-type class) homeobox genes have been analyzed, and several groups of related genes have been identified. The murine Antp-class homeobox genes are localized within four gene clusters. The similar structural organization of the four gene clusters strongly suggests that genes within a group of related Antp-cla...
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The Drosophila melanogaster genome has six physically clustered NK-related homeobox genes in just 180 kb. Here we show that the NK homeobox gene cluster was an ancient feature of bilaterian animal genomes, but has been secondarily split in chordate ancestry. The NK homeobox gene clusters of amphioxus and vertebrates are each split and dispersed at two equivalent intergenic positions. From the a...
متن کاملGenome duplication, extinction and vertebrate evolution.
Vertebrate evolution has been punctuated by three episodes of widespread gene or genome duplication, which have been linked with the origin of vertebrates, gnathostomes and teleosts, respectively. These three events coincide with bursts of character acquisition and increases in phenotypic complexity, and many researchers have suggested a causal relationship between the two. However, this patter...
متن کاملPii: S0378-1119(01)00828-9
The new discipline of Evolutionary Developmental Biology (Evo-Devo) is facing the fascinating paradox of explaining morphological evolution using conserved pieces or genes to build divergent animals. The cephalochordate amphioxus is the closest living relative to the vertebrates, with a simple, chordate body plan, and a genome directly descended from the ancestor prior to the genome-wide duplic...
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ژورنال
عنوان ژورنال: Molecular Biology and Evolution
سال: 2000
ISSN: 1537-1719,0737-4038
DOI: 10.1093/oxfordjournals.molbev.a026251