数字农科院2.0

Genomic Insights Into Mite Phylogeny, Fitness, Development, And Reproduction

文献类型： 外文期刊

作者： Zheng, Hong-Kun;Zhang, Li-Sheng;Liu, Min;Yu, Hai-Yan;Wang, Jie-Ping;Zhang, Zhi-Qiang;Liu, Dong-Yuan;Li, Xu-Ming;Lei, Yan;Tang, Juan;Chen, Xia;Wei, Hui;Lin, Jian-Zhen;Chen, Yong;Zhang, Yan-Xuan;Zhang, Yan-Xuan;Sun, Li;Zhang, Zhi-Qiang

作者机构：

关键词： Genome; Acari; Ecology; Development; Feeding; Sex; Evolution

期刊名称： BMC GENOMICS

ISSN： 1471-2164

年卷期： 2019 年 20 卷 1 期

页码：

收录情况： JCR（2021版）

摘要： Background: Predatory mites (Acari: Phytoseiidae) are the most important beneficial arthropods used in augmentative biological pest control of protected crops around the world. However, the genomes of mites are far less well understood than those of insects and the evolutionary relationships among mite and other chelicerate orders are contested, with the enigmatic origin of mites at one of the centres in discussion of the evolution of Arachnida. Results: We here report the 173 Mb nuclear genome (from 51.75 Gb pairs of Illumina reads) of the predatory mite, Neoseiulus cucumeris, a biocontrol agent against pests such as mites and thrips worldwide. We identified nearly 20.6 Mb (similar to 11.93% of this genome) of repetitive sequences and annotated 18,735 protein-coding genes (a typical gene 2888 bp in size); the total length of protein-coding genes was about 50.55 Mb (29.2% of this assembly). About 37% (6981) of the genes are unique to N. cucumeris based on comparison with other arachnid genomes. Our phylogenomic analysis supported the monophyly of Acari, therefore rejecting the biphyletic origin of mites advocated by other studies based on limited gene fragments or few taxa in recent years. Our transcriptomic analyses of different life stages of N. cucumeris provide new insights into genes involved in its development. Putative genes involved in vitellogenesis, regulation of oviposition, sex determination, development of legs, signal perception, detoxification and stress-resistance, and innate immune systems are identified. Conclusions: Our genomics and developmental transcriptomics analyses of N. cucumeris provide invaluable resources for further research on the development, reproduction, and fitness of this economically important mite in particular and Arachnida in general.

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