Dataset Information

The complete mitogenome of freshwater gammarid Grandidierella taihuensis (Crustacea: Amphipoda).

ABSTRACT: The freshwater gammarid Grandidierella taihuensis is an important composition of benthic community. In this study, the complete mitogenome sequences of G. taihuensis are determined using next-generation and PacBio long-read sequencing. The mitogenome of G. taihuensis is 15,099 bp in size, and consisted of 13 protein-coding genes, two ribosomal RNA genes, 22 tRNA genes, and a putative control region. Gene arrangement is as same as that of G. rubroantennata. The base composition of the entire mitogenome showed a conspicuous A + T bias of 69.4%. The mitogenome data produced in this study provides a useful resource for future evolutionary and ecological studies.

SUBMITTER: Yin J

PROVIDER: S-EPMC8043560 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature

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The complete mitogenome of freshwater gammarid Grandidierella taihuensis (Crustacea: Amphipoda).

Yin Jiawen J Zhao Muzi M Zhang Zeng Z Fu Yanyan Y Liu Yanshan Y Liu Xiaowei X Xu Junhua J Gui Zeyu Z Tang Shengkai S Zhang Tongqing T

Mitochondrial DNA. Part B, Resources 20210408 4

The freshwater gammarid Grandidierella taihuensis is an important composition of benthic community. In this study, the complete mitogenome sequences of G. taihuensis are determined using next-generation and PacBio long-read sequencing. The mitogenome of G. taihuensis is 15,099 bp in size, and consisted of 13 protein-coding genes, two ribosomal RNA genes, 22 tRNA genes, and a putative control region. Gene arrangement is as same as that of G. rubroantennata</i ...[more]

PMID: 33889753

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Project description:BackgroundAlthough the processes of co-evolution between parasites and their hosts are well known, evidence of co-speciation remains scarce. Microsporidian intracellular parasites, due to intimate relationships with their hosts and mixed mode of transmission (horizontal but also vertical, from mother to offspring), may represent an interesting biological model for investigating co-speciation. Amphipod crustaceans, especially gammarids, are regular hosts of microsporidian parasites, in particular the Dictyocoela spp., which have so far been found limited to these amphipods and are known to use a vertical mode of transmission. The amphipod genus Gammarus has a diversification history spanning the last 50-60 Mya and an extensive cryptic diversity in most of the nominal species. Here, we investigated the degree of co-diversification between Dictyocoela and Gammarus balcanicus, an amphipod with high degrees of ancient cryptic diversification and lineage endemism, by examining the genetic diversity of these parasites over the entire geographic range of the host. We hypothesised that the strong host diversification and vertical transmission of Dictyocoela would promote co-diversification.ResultsUsing the parasite SSU rDNA as a molecular marker, analyzing 2225 host specimens from 88 sites covering whole host range, we found 31 haplogroups of Dictyocoela, 30 of which were novel, belonging to four Dictyocoela species already known to infect other Gammarus spp. The relationships between Dictyocoela and gammarids is therefore ancient, with the speciation in parasites preceding those of the hosts. Each novel haplogroup was nevertheless specific to G. balcanicus, leaving the possibility for subsequent co-diversification process during host diversification. A Procrustean Approach to Co-phylogeny (PACo) analysis revealed that diversification of Dictyocoela was not random with respect to that of the host. We found high degrees of congruence between the diversification of G. balcanicus and that of Dictyocoela roeselum and D. muelleri. However, we also found some incongruences between host and Dictyocoela phylogenies, e.g. in D. duebenum, probably due to host shifts between different G. balcanicus cryptic lineages.ConclusionThe evolutionary history of Dictyocoela and Gammarus balcanicus represents an example of an overall host-parasite co-diversification, including cases of host shifts.

Dataset Information

The complete mitogenome of freshwater gammarid Grandidierella taihuensis (Crustacea: Amphipoda).

Publications

The complete mitogenome of freshwater gammarid <i>Grandidierella taihuensis</i> (Crustacea: Amphipoda).

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