Mitochondrial genome diversity and evolution in Branchiopoda (Crustacea).
Branchiopoda
Mitochondrial genomics
Mitochondrial unequal recombination
Notostraca
Nucleotide compositional bias
Nucleotide substitution rate
Journal
Zoological letters
ISSN: 2056-306X
Titre abrégé: Zoological Lett
Pays: England
ID NLM: 101664800
Informations de publication
Date de publication:
2019
2019
Historique:
received:
13
12
2018
accepted:
19
05
2019
entrez:
1
6
2019
pubmed:
1
6
2019
medline:
1
6
2019
Statut:
epublish
Résumé
The crustacean class Branchiopoda includes fairy shrimps, clam shrimps, tadpole shrimps, and water fleas. Branchiopods, which are well known for their great variety of reproductive strategies, date back to the Cambrian and extant taxa can be mainly found in freshwater habitats, also including ephemeral ponds. Mitochondrial genomes of the notostracan taxa Overall, branchiopod mitogenomes share the basic structure congruent with the ancestral Pancrustacea model. On the other hand, rearrangements involving tRNAs and the control region are observed among analyzed taxa. Remarkably, an unassigned region in the Branchiopod mitogenomes appear rather well-conserved, although gene rearrangements have occurred. For the first time, it is reported a putative non-homologous recombination event involving a mitogenome, which produced a pseudogenic tRNA sequence. In addition, in line with data in the literature, we explain the higher substitution rate of Anostraca and Onychocaudata with the inferred GC substitution bias that occurred during their evolution.
Sections du résumé
BACKGROUND
BACKGROUND
The crustacean class Branchiopoda includes fairy shrimps, clam shrimps, tadpole shrimps, and water fleas. Branchiopods, which are well known for their great variety of reproductive strategies, date back to the Cambrian and extant taxa can be mainly found in freshwater habitats, also including ephemeral ponds. Mitochondrial genomes of the notostracan taxa
RESULTS
RESULTS
Overall, branchiopod mitogenomes share the basic structure congruent with the ancestral Pancrustacea model. On the other hand, rearrangements involving tRNAs and the control region are observed among analyzed taxa. Remarkably, an unassigned region in the
CONCLUSIONS
CONCLUSIONS
Branchiopod mitogenomes appear rather well-conserved, although gene rearrangements have occurred. For the first time, it is reported a putative non-homologous recombination event involving a mitogenome, which produced a pseudogenic tRNA sequence. In addition, in line with data in the literature, we explain the higher substitution rate of Anostraca and Onychocaudata with the inferred GC substitution bias that occurred during their evolution.
Identifiants
pubmed: 31149346
doi: 10.1186/s40851-019-0131-5
pii: 131
pmc: PMC6537178
doi:
Types de publication
Journal Article
Langues
eng
Pagination
15Subventions
Organisme : NCI NIH HHS
ID : P30 CA006973
Pays : United States
Déclaration de conflit d'intérêts
Competing interestsThe authors declare that they have no competing interests.
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