您好，欢迎访问西藏自治区农牧科学院 机构知识库！

Strong mitonuclear discordance in the phylogeny of Neodermata and evolutionary rates of Polyopisthocotylea

文献类型： 外文期刊

作者： Zhang, Dong 1 ; Jakovlic, Ivan 2 ; Zou, Hong 3 ; Liu, Fei 1 ; Xiang, Chuan-Yu 2 ; Gusang, Qunzong 1 ; Tso, Sonam 1 ; Xue, Shenggui 1 ; Zhu, Wen-Jin 1 ; Li, Zhenxin 1 ; Wu, Jihua 1 ; Wang, Gui-Tang 1 ;

作者机构： 1.Tibet Univ, Sch Ecol & Environm, Key Lab Biodivers & Environm Qinghai Tibetan Plate, Minist Educ, Lhasa 850011, Peoples R China

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

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

4.Chinese Acad Sci, Inst Hydrobiol, Key Lab Breeding Biotechnol & Sustainable Aquacult, Wuhan 430072, Peoples R China

5.Tibet Acad Agr & Anim Husb Sci, Inst Aquat Sci, Tibet Acad, Lhasa 850032, Peoples R China

6.Tibet Univ, Sch Ecol & Environm, 10 Zangda East St, Lhasa 850011, Peoples R China

7.Chinese Acad Sci, Inst Hydrobiol, 7Donghu South Rd, Wuhan 430072, Hubei, Peoples R China

关键词： Co-evolution; Flatworms; mtDNA; Numt; Parasitism; Phylogeny; Polystomatidea; Selection pressure

期刊名称：INTERNATIONAL JOURNAL FOR PARASITOLOGY （ 影响因子：4.0； 五年影响因子：3.8 ）

ISSN： 0020-7519

年卷期： 2024 年 54 卷 5 期

页码：

收录情况： SCI

摘要： The genomic evolution of Polyopisthocotylea remains poorly understood in comparison to the remaining three classes of Neodermata: Monopisthocotylea, Cestoda, and Trematoda. Moreover, the evolutionary sequence of major events in the phylogeny of Neodermata remains unresolved. Herein we sequenced the mitogenome and transcriptome of the polyopisthocotylean Diplorchis sp., and conducted comparative evolutionary analyses using nuclear (nDNA) and mitochondrial (mtDNA) genomic datasets of Neodermata. We found strong mitonuclear discordance in the phylogeny of Neodermata. Polyopisthocotylea exhibited striking mitonuclear discordance in relative evolutionary rates: the fastest-evolving mtDNA in Neodermata and a comparatively slowly-evolving nDNA genome. This was largely attributable to its very long stem branch in mtDNA topologies, not exhibited by the nDNA data. We found indications that the fast evolution of mitochondrial genomes of Polyopisthocotylea may be driven both by relaxed purifying selection pressures and elevated levels of directional selection. We identified mitochondria-associated genes encoded in the nuclear genome: they exhibited unique evolutionary rates, but not correlated with the evolutionary rate of mtDNA, and there is no evidence for compensatory evolution (they evolved slower than the rest of the genome). Finally, there appears to exist an exceptionally large (approximate to 6.3 kb) nuclear mitochondrial DNA segment (numt) in the nuclear genome of newly sequenced Diplorchis sp. A 30-end segment of the 16S rRNA gene encoded by the numt was expressed, suggesting that this gene acquired novel, regulatory functions after the transposition to the nuclear genome. In conclusion, Polyopisthocotylea appears to be the lineage with the fastest-evolving mtDNA sequences among all of Bilateria, but most of the substitutions were accumulated deep in the evolutionary history of this lineage. As the nuclear genome does not exhibit a similar pattern, the circumstances underpinning this evolutionary phenomenon remain a mystery. (c) 2024 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：西藏自治区农牧科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台