期刊
GENE
卷 783, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.gene.2021.145564
关键词
Mitogenome; Mycetophilidae; Gene arrangement; Comparative analysis; Molecular phylogeny
资金
- National Nature Science Foundation of China [NSFC] [31872270]
The family Mycetophilidae consists of more than 4,500 described species with some economically important to cultivated mushrooms and crops. Through mitochondrial genome sequencing and phylogenetic analysis, it was found that the superfamily Sciaroidea is monophyletic, and the phylogenetic relationships within Mycetophilidae were recovered as (Manotinae + Sciophilinae) + (Mycomyinae + Mycetophilinae). Gene rearrangements were frequent in the crown group, suggesting rapid evolutionary rates in Sciaridae and Cecidomyiidae, which may explain their high species diversity.
The family Mycetophilidae (Diptera: Sciaroidea) consists of more than 4,500 described species distributed worldwide. Among them, dozens of species have been reported to be economically important to cultivated mushrooms and crops. Relationships among subfamilies in Mycetophilidae have been controversial by using morphological characters or gene markers. In this study, five mycetophilid mitogenomes representing four subfamilies were sequenced and analyzed with 15 published sciaroid mitogenomes as ingroup, while another two species representing two closely related families were chosen as outgroup. All of the sequenced mitogenomes contain 37 genes arranged in the ancestral order, including 13 protein-coding genes (PCGs), 22 transfer RNAs (tRNA) genes, two ribosomal RNA (rRNA) genes and a control region (CR). Among mycetophilid mitogenomes, Leu, Ile, Phe, and Met are the most frequently encoded amino acids (AA), with TTA (Leu), ATT (Ile), TTT (Phe) and ATA (Met) being the most frequent codons. Meanwhile, the phylogenetic results reconstructed based on PCGs, PCGs + rRNAs and AA sequences respectively show that the clade of Sciaroidea was well separated from outgroup, further confirming its monophyly. The phylogenetic relationships within Mycetophilidae were recovered as (Manotinae + Sciophilinae) + (Mycomyinae + Mycetophilinae). Mapped to the phylogram, the gene rearrangements occur frequently in the crown group, implying extremely rapid evolutionary rates in Sciaridae and Cecidomyiidae, which might be the reason why the two families have such high species diversity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据