The absence of canonical respiratory complex I subunits in male-type mitogenomes of three Donax species.

Bivalves are an extraordinary class of animals in which species with a doubly uniparental inheritance (DUI) of mitochondrial DNA have been described. DUI is characterized as a mitochondrial homoplasmy of females and heteroplasmy of male individuals where F-type mitogenomes are passed to the progeny with mother egg cells and divergent M-type mitogenomes are inherited with fathers sperm cells. However, in most cases only male individuals retain divergent mitogenome inherited with spermatozoa.

Confirmation of the first intronic sequence in the bivalvian mitochondrial genome of (Linnaeus, 1758).

In 2020, the first male-type mitochondrial genome from the clam was published. Apart from the unusual doubly uniparental inheritance of mtDNA, scientists observed a unique (over 4k bp long) extension in the middle of the gene. We have attempted to replicate these data by NGS DNA sequencing and explore further the expression of the long gene.

No evidence of DUI in the Mediterranean alien species Brachidontes pharaonis (P. Fisher, 1870) despite mitochondrial heteroplasmy.

Two genetically different mitochondrial haplogroups of Brachidontes pharaonis (p-distance 6.8%) have been identified in the Mediterranean Sea. This hinted at a possible presence of doubly uniparental inheritance in this species.

Semimytilus algosus: first known hermaphroditic mussel with doubly uniparental inheritance of mitochondrial DNA.

Doubly uniparental inheritance (DUI) of mitochondrial DNA is a rare phenomenon occurring in some freshwater and marine bivalves and is usually characterized by the mitochondrial heteroplasmy of male individuals. Previous research on freshwater Unionida mussels showed that hermaphroditic species do not have DUI even if their closest gonochoristic counterparts do. No records showing DUI in a hermaphrodite have ever been reported.

The ORF in the control region of the female-transmitted Mytilus mtDNA codes for a protein.

Bivalve species with doubly uniparental inheritance of mitochondria have been shown to contain additional mtDNA-encoded proteins suspected to be involved in sex-specific transmission of the female (F) and male (M) mitochondrial genomes. This is true for freshwater mussels and marine clams but was still unclear for marine mussel Mytilus spp. Here we present evidence that a F mtDNA-specific open reading frame (ORF) identified in the control region of M.

Mitogenomics of (Bivalvia: Mytilidae) and its implications for doubly uniparental inheritance of mitochondria.

Animal mitochondria are usually inherited through the maternal lineage. The exceptional system allowing fathers to transmit their mitochondria to the offspring exists in some bivalves. Its taxonomic spread is poorly understood and new mitogenomic data are needed to fill the gap.

Actively transcribed and expressed gene in mussels.

Background: Animal mitochondrial genomes typically encode 37 genes: 13 proteins, 22 tRNAs and two rRNAs. However, many species represent exceptions to that rule. Bivalvia along with Nematoda and Platyhelminthes are often suspected to fully or partially lack the ATP synthase subunit 8 () gene.

Mitochondrial genomes of the key zooplankton copepods Arctic Calanus glacialis and North Atlantic Calanus finmarchicus with the longest crustacean non-coding regions.

We determined the nearly complete mitochondrial genomes of the Arctic Calanus glacialis and its North Atlantic sibling Calanus finmarchicus, which are key zooplankton components in marine ecosystems. The sequenced part of C. glacialis mitogenome is 27,342 bp long and consists of two contigs, while for C.