A new species of Dune Cricket from China (Orthoptera: Ensifera: Schizodactylidae)

He, Zhu-Qing; Liu, Yi-Jiao

doi:10.11646/zootaxa.4999.4.5

Cited by 1 publication

(1 citation statement)

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“…To further investigate the evolution of the mitochondrial gene order in Schizodactyloidea and compare it with the gene orders of other Ensifera species, we sequenced the complete mitogenome of Schizodactylus jimo He 2021, a unique species of Schizodactyloidea that is found in China [ 38 ]. We then used the S. jimo mitogenome sequence, combined with 84 other available Ensiferan mitogenomes, to carry out a phylogenetic analysis that investigated the types and evolutionary mechanisms of mitochondrial gene arrangements in Ensifera.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Gene Arrangements in the Mitogenomes of Ensifera and Characterization of the Complete Mitogenome of Schizodactylus jimo

Dan

Guan

Jiang

et al. 2022

IJMS

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Gene arrangement (relative location of genes) is another evolutionary marker of the mitogenome that can provide extensive information on the evolutionary mechanism. To explore the evolution of gene arrangements in the mitogenome of diversified Ensifera, we sequenced the mitogenome of the unique dune cricket species found in China and used it for phylogenetic analysis, in combination with 84 known Ensiferan mitogenomes. The mitogenome of Schizodactylus jimo is a 16,428-bp circular molecule that contains 37 genes. We identified eight types of gene arrangement in the 85 ensiferan mitogenomes. The gene location changes (i.e., gene translocation and duplication) were in three gene blocks: I-Q-M-ND2, rrnl-rns-V, and ND3-A-R-N-S-E-F. From the phylogenetic tree, we found that Schizodactylus jimo and most other species share a typical and ancient gene arrangement type (Type I), while Grylloidea has two types (Types II and III), and the other five types are rare and scattered in the phylogenetic tree. We deduced that the tandem replication–random loss model is the evolutionary mechanism of gene arrangements in Ensifera. Selection pressure analysis revealed that purifying selection dominated the evolution of the ensiferan mitochondrial genome. This study suggests that most gene rearrangements in the ensiferan mitogenome are rare accidental events.

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Section: Introductionmentioning

confidence: 99%