| Tracing the Evolution of Avian Wing Digits | |
| Xu, Xing1; Mackem, Susan2; xu.xing@ivpp.ac.cn | |
| 2013-06-17 | |
| 发表期刊 | CURRENT BIOLOGY
 |
| ISSN | 0960-9822 |
| 卷号 | 23期号:12页码:R538-R544 |
| 文章类型 | Review |
| 摘要 | It is widely accepted that birds are a subgroup of dinosaurs, but there is an apparent conflict: modern birds have been thought to possess only the middle three fingers (digits II-III-IV) of an idealized five-digit tetrapod hand based on embryological data, but their Mesozoic tetanuran dinosaur ancestors are considered to have the first three digits (I-II-III) based on fossil evidence. How could such an evolutionary quirk arise? Various hypotheses have been proposed to resolve this paradox. Adding to the confusion, some recent developmental studies support a designation for avian wing digits whereas some recent paleontological data are consistent with a identification of the Mesozoic tetanuran digits. A comprehensive analysis of both paleontological and developmental data suggests that the evolution of the avian wing digits may have been driven by homeotic transformations of digit identity, which are more likely to have occurred in a partial and piecemeal manner. Additionally, recent genetic studies in mouse models showing plausible mechanisms for central digit loss invite consideration of new alternative possibilities (I-II-IV or I-III-IV) for the homologies of avian wing digits. While much progress has been made, some advances point to the complexity of the problem and a final resolution to this ongoing debate demands additional work from both paleontological and developmental perspectives, which will surely yield new insights on mechanisms of evolutionary adaptation. |
| 关键词 | Hox Genes Sonic Hedgehog Frame-shift Limb Bud Birds Origin Homology Identity Expression Dinosaurs |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| URL | 查看原文 |
| 关键词[WOS] | HOX GENES ; SONIC HEDGEHOG ; FRAME-SHIFT ; LIMB BUD ; BIRDS ; ORIGIN ; HOMOLOGY ; IDENTITY ; EXPRESSION ; DINOSAURS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Biochemistry & Molecular Biology ; Cell Biology |
| WOS类目 | Biochemistry & Molecular Biology ; Cell Biology |
| WOS记录号 | WOS:000320682800015 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/4141 |
| 专题 | 古低等脊椎动物研究室 |
| 通讯作者 | xu.xing@ivpp.ac.cn |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origin, Beijing 100044, Peoples R China 2.NCI, Canc & Dev Biol Lab, Ctr Canc Res, NIH, Frederick, MD 21702 USA |
| 推荐引用方式 GB/T 7714 | Xu, Xing,Mackem, Susan,xu.xing@ivpp.ac.cn. Tracing the Evolution of Avian Wing Digits[J]. CURRENT BIOLOGY,2013,23(12):R538-R544. |
| APA | Xu, Xing,Mackem, Susan,&xu.xing@ivpp.ac.cn.(2013).Tracing the Evolution of Avian Wing Digits.CURRENT BIOLOGY,23(12),R538-R544. |
| MLA | Xu, Xing,et al."Tracing the Evolution of Avian Wing Digits".CURRENT BIOLOGY 23.12(2013):R538-R544. |
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