Analysis of 41 plant genomes supports a wave of successful genome duplications in association with the Cretaceous-Paleogene boundary.
Analysis of 41 plant genomes supports a wave of successful genome duplications in association with the Cretaceous-Paleogene boundary.
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对41个植物基因组的分析支持了与白垩纪 - 果仁边界相关的成功基因组重复。
DOI：
10.1101/gr.168997.113
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发表时间：
2014-08
期刊：
影响因子：
7
通讯作者：
Van de Peer Y
中科院分区：
文献类型：
--
作者：
Vanneste K;Baele G;Maere S;Van de Peer Y
古代全基因组复制（WGD），也被称为古多倍化，已被报道在大多数进化谱系。它们的角色仍然是一个主要的讨论话题，从进化的死胡同到进化成功的道路，都有证据支持这两种命运。此前，基于对有限数量植物物种的WGDs进行测年，我们发现大约6600万年前白垩纪-古近纪（K-Pg）灭绝事件周围存在被子植物古多倍化集群。在这里，我们通过结合更多植物谱系的基因组序列信息和使用更复杂的分析来重新审视这一发现，这一发现已经证明是有争议的。我们包括38个全基因组序列和三个转录组组装在贝叶斯进化分析框架，采用不相关的放松时钟方法和化石的不确定性。根据早期的研究结果，我们证明了一个强烈的非随机模式的基因组复制随着时间的推移，许多WGD集群周围的K-Pg边界。我们解释这些结果的背景下，最近的研究入侵多倍体植物物种，并建议，多倍体的建立，促进在环境压力的时候。我们认为，根据多倍体化时周围的环境和生态条件来考虑多倍体的进化潜力，可以减轻多倍体进化命运的鲜明对比。
Ancient whole-genome duplications (WGDs), also referred to as paleopolyploidizations, have been reported in most evolutionary lineages. Their attributed role remains a major topic of discussion, ranging from an evolutionary dead end to a road toward evolutionary success, with evidence supporting both fates. Previously, based on dating WGDs in a limited number of plant species, we found a clustering of angiosperm paleopolyploidizations around the Cretaceous–Paleogene (K–Pg) extinction event about 66 million years ago. Here we revisit this finding, which has proven controversial, by combining genome sequence information for many more plant lineages and using more sophisticated analyses. We include 38 full genome sequences and three transcriptome assemblies in a Bayesian evolutionary analysis framework that incorporates uncorrelated relaxed clock methods and fossil uncertainty. In accordance with earlier findings, we demonstrate a strongly nonrandom pattern of genome duplications over time with many WGDs clustering around the K–Pg boundary. We interpret these results in the context of recent studies on invasive polyploid plant species, and suggest that polyploid establishment is promoted during times of environmental stress. We argue that considering the evolutionary potential of polyploids in light of the environmental and ecological conditions present around the time of polyploidization could mitigate the stark contrast in the proposed evolutionary fates of polyploids.
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DOI：
10.1111/j.1469-8137.2009.03087.x
发表时间：
2010-04
期刊：
The New phytologist
影响因子：
--
作者：
Birchler JA;Veitia RA
通讯作者：
Veitia RA
影响因子：
4.4
作者：
Berlin S;Lagercrantz U;von Arnold S;Ost T;Rönnberg-Wästljung AC
通讯作者：
Rönnberg-Wästljung AC
影响因子：
9.4
作者：
Clarke, John T.;Warnock, Rachel C. M.;Donoghue, Philip C. J.
通讯作者：
Donoghue, Philip C. J.
影响因子：
64.8
作者：
Aury, Jean-Marc;Jaillon, Olivier;Wincker, Patrick
通讯作者：
Wincker, Patrick
影响因子：
64.8
作者：
D'Hont, Angelique;Denoeud, France;Wincker, Patrick
通讯作者：
Wincker, Patrick