Chromosome- level genomes of two armyworms, Mythimna separata and Mythimna loreyi, provide insights into the biosynthesis and reception of sex pheromones

文献类型： 外文期刊

第一作者： Zhao, Hanbo

作者： Zhao, Hanbo;Liu, Hangwei;Liu, Yipeng;Wang, Sen;Jiang, Fan;Wang, Hengchao;Wang, Anqi;Xu, Dong;Wang, Guirong;Fan, Wei;Liu, Yipeng;Wang, Chan;Ma, Baiwei;Zhang, Mengjun;Zhang, Yan;Liu, Yang;Yang, Bin;Wang, Guirong;Wang, Guirong;Fan, Wei

作者机构：

关键词： Mythimna loreyi; Mythimna separata; sex pheromones biosynthesis; sex pheromones reception; Spodoptera frugiperda

期刊名称：MOLECULAR ECOLOGY RESOURCES （ 影响因子：7.7； 五年影响因子：8.0 ）

ISSN： 1755-098X

年卷期： 2023 年 23 卷 6 期

页码：

收录情况： SCI

摘要： Mythimna separata and Mythimna loreyi are global pests of gramineous cereals, heavily controlled with synthetic insecticides. Here, we generated two high-quality chromosome -level genome assemblies for M. separata (688 Mb) and M. loreyi (683 Mb). Our analysis identified Z and W chromosomes, with few genes and abundant transposable elements (TEs) found on the W chromosome. We also observed a recent explosion of long interspersed nuclear elements (LINEs), which contributed to the larger genomes of Mythimna. The two armyworms diverged similar to 10.5 MYA, with only three chromosomes have intrachromosomal rearrangements. Additionally, we observed a tandem repeat expansion of a- amylase genes in Mythimna, which may promote the digestion of carbohydrates and exacerbate their damage to crops. Furthermore, we inferred the sex pheromone biosynthesis pathway for M. separata, M. loreyi and Spodoptera frugiperda. We discovered that M. loreyi and S. frugiperda synthesized the same major constituents of sex pheromones through different pathways. Specifically, the double bonds in the dominant sex pheromone components of S. frugiperda were generated by Delta 9-and ?11- desaturase, while they were generated by Delta 11-desaturase and chain-shortening reactions in M. loreyi. We also identified pheromone receptor (PR) genes and inferred their corresponding components. These findings provide a better understanding of sex pheromone communication and promote the development of a new pest control strategy involving pheromone traps, which are more effective and environmentally friendly than current strategies.

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