Preferential gene retention increases the robustness of cold regulation in Brassicaceae and other plants after polyploidization
Preferential gene retention increases the robustness of cold regulation in Brassicaceae and other plants after polyploidization
复制标题
优先基因保留增加了十字花科和其他植物多倍化后冷调节的鲁棒性
DOI：
10.1038/s41438-020-0253-0
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发表时间：
2020-02-21
影响因子：
8.7
通讯作者：
Wang, Xi-Yin
中科院分区：
文献类型：
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作者：
Song, Xiao-Ming;Wang, Jin-Peng;Wang, Xi-Yin
低温胁迫对植物的生长发育有着深刻的影响，是影响植物地理分布和进化的关键因素。植物已经进化出适应机制来科普冷胁迫。通过对拟南芥、芸苔属3个种和其他17个代表性种的基因组分析，我们发现，在多倍体化后，冷相关基因（CRG）及其共线性优先保留，而基因组范围内的基因集则表现出多种其他扩展机制。在被子植物基因组中，与冷相关的调控网络增加，这些基因组受到多倍化的递归影响。通过结合我们的研究结果选择性保留CRG从这个生态基因组学研究与现有的知识冷诱导染色体加倍，我们推测，冷胁迫可能有助于多倍体植物的成功，通过增加多倍体化和选择性地保持CRG在进化过程中。这一假说需要进一步的生物学和生态学探索，以获得坚实的支持证据，这将有助于理解多倍体的产生和生态基因组学领域。
Cold stress profoundly affects plant growth and development and is a key factor affecting the geographic distribution and evolution of plants. Plants have evolved adaptive mechanisms to cope with cold stress. Here, through the genomic analysis of Arabidopsis, three Brassica species and 17 other representative species, we found that both cold-related genes (CRGs) and their collinearity were preferentially retained after polyploidization followed by genome instability, while genome-wide gene sets exhibited a variety of other expansion mechanisms. The cold-related regulatory network was increased in Brassicaceae genomes, which were recursively affected by polyploidization. By combining our findings regarding the selective retention of CRGs from this ecological genomics study with the available knowledge of cold-induced chromosome doubling, we hypothesize that cold stress may have contributed to the success of polyploid plants through both increasing polyploidization and selectively maintaining CRGs during evolution. This hypothesis requires further biological and ecological exploration to obtain solid supporting evidence, which will potentially contribute to understanding the generation of polyploids and to the field of ecological genomics.