Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Rd, Nanjing 210023, China.
Department of Biology, Northern Michigan University, Marquette, MI, USA.
Mol Phylogenet Evol. 2020 Feb;143:106669. doi: 10.1016/j.ympev.2019.106669. Epub 2019 Nov 4.
We present here a combined mitogenome gene order dataset totalling 62% of the known genera of East Asian potamiscine freshwater crabs that includes first-time mitogenome data for 14 species and gene order data from 37 other species of potamiscines. A surprisingly high number of mitogenome gene order rearrangements were found in the taxa studied (comprising nine different rearrangements and seven major patterns, one of which has two sub-arrangements). Our phylogenetic reconstructions indicate that the mitogenome gene order rearrangements are associated with the evolutionary history of potamiscine lineages. We also used a new Event-based Maximum Parsimony method to reconstruct ancestral gene orders, which takes into consideration gene duplication, pseudogeneticization, and tandem duplication random loss. Furthermore, shared mitogenome gene order patterns were used to inform the taxonomic placement of Sinopotamon parvum, and the cryptic diversity in Potamiscus. The remarkably frequent mitogenome rearrangements in potamiscine freshwater crabs have great potential to contribute to our understanding of the evolutionary history of these highly diverse decapods in East Asia.
我们在此呈现了一个涵盖东亚穴蟹属淡水蟹已知属的 62%的组合线粒体基因组基因排列数据集，其中包括 14 个种的首次线粒体基因组数据和 37 个其他穴蟹属种的基因排列数据。在所研究的分类群中发现了相当数量的线粒体基因组基因排列重排（包括九种不同的重排和七种主要模式，其中一种有两个亚排列）。我们的系统发育重建表明，线粒体基因组基因排列重排与穴蟹谱系的进化历史有关。我们还使用了一种新的基于事件的最大简约法来重建祖先基因顺序，该方法考虑了基因复制、假基因化和串联重复随机丢失。此外，共享的线粒体基因组基因排列模式被用于推断中华绒螯蟹和扁蟹的分类位置，并揭示了它们的隐多样性。东亚这些高度多样化十足目甲壳动物的线粒体基因组频繁重排，为我们理解其进化历史提供了巨大的潜力。
