Evolutionary relationships among barley and Arabidopsis core circadian clock and clock-associated genes.
Evolutionary relationships among barley and Arabidopsis core circadian clock and clock-associated genes.
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DOI：
10.1007/s00239-015-9665-0
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发表时间：
2015-02
影响因子：
3.9
通讯作者：
Brown, John W. S.
中科院分区：
文献类型：
--
作者：
Calixto, Cristiane P. G.;Waugh, Robbie;Brown, John W. S.
生物钟调节植物的许多发育和代谢过程。在作物物种中，它对植物的性能和生产力以及作物的适应性和地理范围都有很大的贡献。为了了解大麦中的生物钟以及它与拟南芥生物钟中的组成部分之间的关系，我们对大麦、拟南芥和另外8个物种（包括番茄、马铃薯、一系列单子叶植物和苔藓小立碗藓）中的核心生物钟和生物钟相关基因进行了系统分析。我们已经确定了拟南芥基因的直向同源物和旁系同源物，这些基因在所有物种中都是保守的，单子叶植物/双子叶植物的差异，物种特异性差异和基因拷贝数的变化（例如，不同物种之间的基因重复）。我们建议，大麦和拟南芥的共同祖先有三分之二的关键时钟组件确定在拟南芥之前的单子叶/双子叶植物群的分离。分离后，单子叶和双子叶植物的祖先都发生了多个独立的基因重复事件。本文的在线版本（doi：10.1007/s 00239 -015-9665-0）包含补充材料，可供授权用户使用。
The circadian clock regulates a multitude of plant developmental and metabolic processes. In crop species, it contributes significantly to plant performance and productivity and to the adaptation and geographical range over which crops can be grown. To understand the clock in barley and how it relates to the components in the Arabidopsis thaliana clock, we have performed a systematic analysis of core circadian clock and clock-associated genes in barley, Arabidopsis and another eight species including tomato, potato, a range of monocotyledonous species and the moss, Physcomitrella patens. We have identified orthologues and paralogues of Arabidopsis genes which are conserved in all species, monocot/dicot differences, species-specific differences and variation in gene copy number (e.g. gene duplications among the various species). We propose that the common ancestor of barley and Arabidopsis had two-thirds of the key clock components identified in Arabidopsis prior to the separation of the monocot/dicot groups. After this separation, multiple independent gene duplication events took place in both monocot and dicot ancestors. The online version of this article (doi:10.1007/s00239-015-9665-0) contains supplementary material, which is available to authorized users.
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