Continuous genetic adaptation to high elevations of alpine bamboos in the Hengduan Mountains, Southwest China
Continuous genetic adaptation to high elevations of alpine bamboos in the Hengduan Mountains, Southwest China
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DOI：
10.1111/jse.13038
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发表时间：
2023-12
影响因子：
3.7
通讯作者：
Li‐Ying Luo;Gui‐Hua Jin;Peng‐Fei Ma;Dezhu Li
中科院分区：
文献类型：
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作者：
Li‐Ying Luo;Gui‐Hua Jin;Peng‐Fei Ma;Dezhu Li
许多由高海拔适应引起的表型改变的例子已经被记录在案，然而，负责这些改变的潜在过程以及适应过程的连续性是否仍然难以捉摸，特别是在植物中。分布在宽海拔梯度上的高山植物为解决这一问题提供了理想的系统。在此，我们收集了高山竹属马尾竹属和玉山竹属三种不同海拔(横断山区~1500米、~2500米、~3600m)高山竹类植物的多个组织的转录本，并进行了进化和表达分析。结果表明，高海拔适应在两属的进化史中出现得较早，并随着海拔的升高而不断演化。此外，在这两个属中观察到了遗传变化的趋同性，在正选择下确定了大量负责高海拔适应的候选基因。总之，我们的研究为进一步研究植物对高海拔环境的适应提供了经验范例和宝贵的遗传资源，并为植物如何适应生物多样性热点地区的高海拔环境提供了新的线索。
Many examples of phenotypic modifications resulting from high‐elevation adaptation have been documented, however, the underlying processes responsible for these modifications and whether the continuity of the adaptation process remain elusive, particularly in plants. The alpine plants distributed along wide elevational gradients provide an ideal system to address this question. Here, we collected transcriptomes from multiple tissues of three species with different elevations (~1500, ~2500, and ~3600 m in the Hengduan Mountains, Southwest China) in two genera Fargesia and Yushania of alpine bamboos, respectively, and conducted evolutionary and expressional analyses. Results showed that high‐elevation adaptation emerged earlier in the evolutionary history of both genera and evolved continuously as the elevation increased. Moreover, convergence of genetic changes was observed in the two genera, with amounts of candidate genes responsible for high‐elevation adaptation identified under positive selection. Overall, our study provides an empirical example and valuable genetic resource for further investigation of high‐elevation adaptation in plants and sheds new light on how plants adapting to high‐elevation environments in a biodiversity hotspot.