Molecular and Paleontological Evidence for a Post-Cretaceous Origin of Rodents

IVPP-IR > 中科院古脊椎所（2000年以后）

	Molecular and Paleontological Evidence for a Post-Cretaceous Origin of Rodents
	Wu, Shaoyuan 1,2; Wu, Wenyu 3; Zhang, Fuchun 4; Ye, Jie 3; Ni, Xijun 3; Sun, Jimin 5; Edwards, Scott V.1,2; Meng, Jin 6; Organ, Chris L.1,2
	2012-10-05
发表期刊	PLOS ONE
卷号	7 期号:10
文章类型	Article
摘要	The timing of the origin and diversification of rodents remains controversial, due to conflicting results from molecular clocks and paleontological data. The fossil record tends to support an early Cenozoic origin of crown-group rodents. In contrast, most molecular studies place the origin and initial diversification of crown-Rodentia deep in the Cretaceous, although some molecular analyses have recovered estimated divergence times that are more compatible with the fossil record. Here we attempt to resolve this conflict by carrying out a molecular clock investigation based on a nine-gene sequence dataset and a novel set of seven fossil constraints, including two new rodent records (the earliest known representatives of Cardiocraniinae and Dipodinae). Our results indicate that rodents originated around 61.7-62.4 Ma, shortly after the Cretaceous/Paleogene (K/Pg) boundary, and diversified at the intraordinal level around 57.7-58.9 Ma. These estimates are broadly consistent with the paleontological record, but challenge previous molecular studies that place the origin and early diversification of rodents in the Cretaceous. This study demonstrates that, with reliable fossil constraints, the incompatibility between paleontological and molecular estimates of rodent divergence times can be eliminated using currently available tools and genetic markers. Similar conflicts between molecular and paleontological evidence bedevil attempts to establish the origination times of other placental groups. The example of the present study suggests that more reliable fossil calibration points may represent the key to resolving these controversies.
WOS标题词	Science & Technology
关键词[WOS]	3 NUCLEAR GENES ; DIVERGENCE TIMES ; MAMMAL DIVERSIFICATION ; PLACENTAL MAMMALS ; EVOLUTION ; PHYLOGENY ; FOSSIL ; GLIRES ; SUBSTITUTIONS ; ANTIQUITY
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000309827300030
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7343
专题	中科院古脊椎所（2000年以后）
作者单位	1.Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA 2.Harvard Univ, Museum Comparat Zool, Cambridge, MA 02138 USA 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 4.Xinjiang Univ, Xinjiang Key Lab Biol Resources & Genet Engn, Urumqi, Xinjiang, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China 6.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA
推荐引用方式 GB/T 7714	Wu, Shaoyuan,Wu, Wenyu,Zhang, Fuchun,et al. Molecular and Paleontological Evidence for a Post-Cretaceous Origin of Rodents[J]. PLOS ONE,2012,7(10).
APA	Wu, Shaoyuan.,Wu, Wenyu.,Zhang, Fuchun.,Ye, Jie.,Ni, Xijun.,...&Organ, Chris L..(2012).Molecular and Paleontological Evidence for a Post-Cretaceous Origin of Rodents.PLOS ONE,7(10).
MLA	Wu, Shaoyuan,et al."Molecular and Paleontological Evidence for a Post-Cretaceous Origin of Rodents".PLOS ONE 7.10(2012).