Accelerated evolution of early angiosperms: Evidence from ranunculalean phylogeny by integrating living and fossil data

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	Accelerated evolution of early angiosperms: Evidence from ranunculalean phylogeny by integrating living and fossil data
其他题名	Accelerated evolution of early angiosperms: evidence from ranunculalean phylogeny by integrating living and fossil data
	Wang Wei 1; Dilcher David L 2; Sun Ge 2; Wang HongShan 2; Chen ZhiDuan 1
	2016
发表期刊	JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN	1674-4918
卷号	54 期号:4 页码:336-341
摘要	The new discovery of angiosperm remains in the Jehol Biota of northeastern China contributes to our understanding of the origin and early evolution of flowering plants. The earliest eudicot genus with reproductive organs, Leefructus, was recently documented from the Lower Cretaceous Yixian Formation at 125.8-123.0 Ma, and was reconsidered to be close to the extant family Ranunculaceae based on gross morphology. However, this hypothesis has not been tested using a cladistic approach. To determine the possible allies of Leefructus within extant eudicots, we constructed a 66 morphological data matrix. Molecular and morphological analyses of extant Ranunculales combined with the fossil suggest that it has an affinity with the Ranunculaceae. The earliest fossil record of the eudicots is 127-125 Ma based on tricolpate pollen grains. Thus, we suggest a hypothesis that the basal eudicots might have experienced an accelerated evolution and diversification during the latest Barremian and earliest Aptian, leading to the stem groups of at least six extant families or lineages, 10-15 Myr earlier than currently documented. Angiosperms have undergone multiple uneven pulses of radiation since their origin. Many key character innovations occurred in different stages that could have triggered those radiations in concert with various biotic and abiotic factors.
其他摘要	The new discovery of angiosperm remains in the Jehol Biota of northeastern China contributes to our understanding of the origin and early evolution of flowering plants. The earliest eudicot genus with reproductive organs, Leefructus, was recently documented from the Lower Cretaceous Yixian Formation at 125.8-123.0 Ma, and was reconsidered to be close to the extant family Ranunculaceae based on gross morphology. However, this hypothesis has not been tested using a cladistic approach. To determine the possible allies of Leefructus within extant eudicots, we constructed a 66 morphological data matrix. Molecular and morphological analyses of extant Ranunculales combined with the fossil suggest that it has an affinity with the Ranunculaceae. The earliest fossil record of the eudicots is 127-125 Ma based on tricolpate pollen grains. Thus, we suggest a hypothesis that the basal eudicots might have experienced an accelerated evolution and diversification during the latest Barremian and earliest Aptian, leading to the stem groups of at least six extant families or lineages, 10-15 Myr earlier than currently documented. Angiosperms have undergone multiple uneven pulses of radiation since their origin. Many key character innovations occurred in different stages that could have triggered those radiations in concert with various biotic and abiotic factors.
关键词	SP NOV. YIXIAN FORMATION CRATO FORMATION POTOMAC GROUP GEN. AGE MITOCHONDRIAL DIVERSIFICATION RADIATION SEQUENCES angiosperms Cretaceous diversification paleobotany phylogeny Ranunculales
收录类别	CSCD
语种	英语
资助项目	[National Basic Research Program of China] ; [National Natural Science Foundation of China] ; [Youth Innovation Promotion Association Foundation of CAS]
CSCD记录号	CSCD:5757448
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/150827
专题	中国科学院金属研究所
作者单位	1.中国科学院 2.中国科学院金属研究所 3.吉林大学 4.印第安纳大学 5.University Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA
推荐引用方式 GB/T 7714	Wang Wei,Dilcher David L,Sun Ge,et al. Accelerated evolution of early angiosperms: Evidence from ranunculalean phylogeny by integrating living and fossil data[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2016,54(4):336-341.
APA	Wang Wei,Dilcher David L,Sun Ge,Wang HongShan,&Chen ZhiDuan.(2016).Accelerated evolution of early angiosperms: Evidence from ranunculalean phylogeny by integrating living and fossil data.JOURNAL OF SYSTEMATICS AND EVOLUTION,54(4),336-341.
MLA	Wang Wei,et al."Accelerated evolution of early angiosperms: Evidence from ranunculalean phylogeny by integrating living and fossil data".JOURNAL OF SYSTEMATICS AND EVOLUTION 54.4(2016):336-341.