Can phylogenetics identify C4 origins and reversals?
Can phylogenetics identify C4 origins and reversals?
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DOI：
10.1016/j.tree.2010.04.007
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发表时间：
2010-07-01
影响因子：
16.8
通讯作者：
Osborne, Colin P.
中科院分区：
文献类型：
--
作者：
Christin, Pascal-Antoine;Freckleton, Rob P.;Osborne, Colin P.
确定适应性性状之间过去的转变方向是进化生物学的主要目标之一。可以从遗传学中获得见解，但违反用于重建特征的统计模型的假设可能会导致严重的偏见，应考虑补充证据。在这里，我们回顾的弱点，仅仅依靠物种的进化重建的C-4光合作用在草，一个复杂的性状存在于不同的系统发育组的进化历史。我们认为，进化转换应重建的同源性或收敛性的基础上建立的不同状态的遗传和表型分析。这样的方法指向C-4收益的优势逆转C-3，我们讨论了这种不对称的过渡率的潜在解释。
Determining the direction of past transitions between adaptive traits is one of the major objectives of evolutionary biology. Insights can be gained from phylogenies, but violation of the assumptions of the statistical models used to reconstruct traits can result in severe biases and complementary evidence should be considered. Here, we review the weaknesses of relying solely on species phylogenies in reconstructing the evolutionary history of C-4 photosynthesis in grasses, a complex trait present in distinct phylogenetic groups. We argue that evolutionary transitions should be reconstructed by establishing the homology or convergence of the different states based on genetic and phenotypic analyses. Such an approach points to a predominance of C-4 gains over reversals to C-3 and we discuss potential explanations for this asymmetry in transition rates.