Molecular evolution and phylogeny of the angiosperm ycf2 gene
Molecular evolution and phylogeny of the angiosperm ycf2 gene
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DOI：
10.1111/j.1759-6831.2010.00080.x
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发表时间：
2010-07-01
影响因子：
3.7
通讯作者：
Zhang, Da-Ming
中科院分区：
文献类型：
--
作者：
Huang, Jin-Ling;Sun, Gui-Ling;Zhang, Da-Ming
近年来，在被子植物遗传学研究中，多基因或质体基因组数据集的应用取得了很大进展。然而，很大程度上还不清楚需要多大的数据集才能达到足够的分辨率。ycf2基因是被子植物中最大的质体基因，在被子植物关系的早期研究中，它被用作多基因数据集的一部分。在这项研究中，我们表明，ycf2基因单独可以提供一个普遍支持的同源性，这是与最全面的多基因或质体基因组数据集推断的一致。ycf2基因的系统发育信号可能来自其长序列长度和低核苷酸替换率的组合。ycf2基因可以提供一个低成本的替代全面的多基因或基因组数据集调查被子植物的关系。
Much of the recent progress in understanding angiosperm phylogeny has been achieved using multigene or plastid genome datasets. However, it is largely unclear what size of dataset is required to achieve sufficient resolution. The ycf2 gene is the largest plastid gene in angiosperms and it was used as part of multigene datasets in several earlier investigations into angiosperm relationships. In this study, we show that the ycf2 gene alone can provide a generally well-supported phylogeny that is consistent with those inferred from the most comprehensive multigene or plastid genome datasets. The phylogenetic signal of the ycf2 gene is likely derived from the combination of its long sequence length and low rate of nucleotide substitution. The ycf2 gene may provide a low-cost alternative to comprehensive multigene or genome datasets for investigating angiosperm relationships.