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Drivers of interlineage variability in mitogenomic evolutionary rates in Platyhelminthes

文献类型： 外文期刊

作者： Jakovlic, Ivan 1 ; Ye, Tong 1 ; Zou, Hong 3 ; Zhu, Fengyue 5 ; Shi, Yuying 1 ; Ma, Yiwen 1 ; Wang, Gui-Tang 3 ; Li, Wen-Xiang 3 ; Zhang, Dong 1 ;

作者机构： 1.Lanzhou Univ, State Key Lab Herbage Improvement & Grassland Agro, Lanzhou 730000, Peoples R China

2.Lanzhou Univ, Coll Ecol, Lanzhou 730000, Peoples R China

3.Chinese Acad Sci, Key Lab Aquaculture Dis Control, Minist Agr, Wuhan 430072, Peoples R China

4.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

5.Natl Agr Sci Observing & Expt Stn Chongqing, Chongqing 401329, Peoples R China

6.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430073, Peoples R China

7.Tibet Univ, Sch Ecol & Environm, Key Lab Biodivers & Environm Qinghai Tibetan Plate, Minist Educ, Lhasa 850011, Peoples R China

期刊名称：HEREDITY （ 影响因子：3.1； 五年影响因子：3.3 ）

ISSN： 0018-067X

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Studies of forces driving interlineage variability in the evolutionary rates (both sequence and architecture) of mitochondrial genomes often produce contradictory results. Flatworms (Platyhelminthes) exhibit the fastest-evolving mitogenomic sequences among all bilaterian phyla. To test the effects of multiple factors previously associated with different aspects of mitogenomic evolution, we used mitogenomes of 223 flatworm species, phylogenetic multilevel regression models, and causal inference. Thermic host environment (endothermic vs. ectothermic) had nonsignificant impacts on both sequence evolution and mitogenomic size. Mitogenomic gene order rearrangements (GORR) were mostly positively correlated with mitogenomic size (R-2 approximate to 20-30%). Longevity was not (negatively) correlated with sequence evolution in flatworms. The predominantly free-living "turbellaria" exhibited much shorter branches and faster-evolving mitogenomic architecture than parasitic Neodermata. As a result, "parasitism" had a strong explanatory power on the branch length variability (>90%), and there was a negative correlation between GORR and branch length. However, the stem branch of Neodermata comprised 63.6% of the total average branch length. This evolutionary period was also marked by a high rate of gene order rearrangements in the ancestral Neodermata. We discuss how this period of rapid evolution deep in the evolutionary history may have decoupled sequence evolution rates from longevity and GORR, and overestimated the explanatory power of "parasitism". This study shows that impacts of variables often vary across lineages, and stresses the importance accounting for the episodic nature of evolutionary patterns in studies of mitogenomic evolution.

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