Amin Eimanifar

The complete mitochondrial genome of the western honey bee subspecies Apis mellifera meda was sequenced. This mitochondrial genome is 16,248 bp in length, with 37 classical eukaryotic mitochondrial genes and an A + T-rich region. Gene direction and arrangement are similar to those of other Apis mitogenomes. All genes initiate with ATT (six genes), ATG (four genes), ATA (two genes), and ATC (one gene) start codons and terminate with a TAA stop codon. Four genes are encoded on the heavy and nine on the light strands, respectively. All of the 22 tRNA genes, ranging from 66 to 78 bp, have a typical cloverleaf structure. The complete mitogenome of A.m. meda provides information on the biogeography and evolution of A. mellifera subspecies.

The complete mitochondrial genome of the western honey bee subspecies Apis mellifera lamarckii was sequenced. This mitochondrial genome is 16,589 bp in length with 37 classical eukaryotic mitochondrial genes and an A + T-rich region. Gene directions and arrangements are similar to those of other Apis mitogenomes. Seven genes begin with ATT, four with ATG, and two with ATA (none with ATC) and all genes terminate with TAA. Four genes are encoded on the heavy strand and nine are encoded on light strand. All of the 22 tRNA genes, ranging from 66 to 80 bp, have a typical cloverleaf structure. A phylogenetic tree showed that A.m. lamarckii clusters with other A. mellifera subspecies, as expected.

The complete mitochondrial genome of Apis nigrocincta was sequenced. The mitochondrial genome is a circular molecule of 15,855 bp, including 37 classical eukaryotic mitochondrial regions and an A + T-rich region. Gene directions and arrangements are similar to those of other Apis mitogenomes. Most genes initiated with ATT, though ATG and ATA were also used as start codons. Twelve of 13 protein-coding genes terminated with TAA, though ND2 terminated with TAG. Four PCG genes, eight tRNAs and both rRNAs were encoded on the heavy strand while all others were encoded on the light strand (9 PCGs and 14 tRNAs). Overall, the GC content composed 15.6% of the mitogenome. All of the 22 tRNA genes, ranging from 66 to 114 bp, have a typical cloverleaf structure. A phylogenetic tree showed that A. nigrocincta clustered closest to A. cerana. The complete mitogenome of A. nigrocincta provides essential information on the biogeography and evolution of this Asian honey bee species.

The brine shrimp Artemia urmiana, an abundant inhabitant of the hypersaline Urmia Lake in northwestern Iran, has recently been described from Lake Koyashskoe, also a shallow hypersaline lake that is located on the Black Sea coast of the Crimean Peninsula (Ukraine). This discovery has questioned the endemicity of A. urmiana in Urmia Lake and has also brought into question the biogeographical origin of this species. In the present study, we combined recent genetic divergence data (mtDNA-COI) with palaeoecological evidence to address the biogeographical origin of A. urmiana. Calibration of the molecular clock of the COI region was set by assigning the age of the micro-crustacean Daphnia pulex minimally at 145 Mya. The divergence age of A. urmiana in Urmia Lake dates back to 383,000 years, whereas Ukrainian Artemia reflects a very young populations that diverged about 196,000 years ago. Palaeoecological evidence suggests that the age of the major habitat of A. urmiana i.e. Urmia Lake goes back to the Tertiary Period while the Ukranian habitats of the species are very young, by virtue of geological features of the Holocene age. We conclude that the biogeographical origin of A. urmiana is outside of Europe and the current state of knowledge strongly suggests that Urmia Lake has been the major source of its expansion into its modern habitats in Europe.

Urmia Lake, an endorheic salt lake in northwestern Iran, was registered in the Ramsar Convention on Wetlands as a wetland of international importance, also a UNESCO biosphere reserve. In this review, we have updated our last checklist in 2014 with available information on the biodiversity of the lake.

We characterized the complete mitogenome sequence of the South African hybrid honey bee Apis mellifera capensis × Apis mellifera scutellata using genome skimming. The mitochondrial genome was a circular molecule 16,340 bp in length with a gene organization identical to that of the other A. mellifera mitogenomes. The base composition is 43.2% A, 9.7% C, 5.6% G, and 41.5% T, with an A + T content of 84.7%. The mitogenome had 13 protein-coding genes (PCGs), 22 transfer RNAs, two ribosomal RNAs genes, and one control region. All PCGs were initiated by ATT, ATG, ATA, and ATC codons and were terminated by a TAA stop codon. The heavy strand encodes four PCGs, eight tRNAs, and two rRNAs. The light strand encodes nine PCGS and 14 tRNAs. A phylogenetic analysis of the PCGs reveals a close relationship between this hybrid honey bee and other Apis spp.

We characterized the complete mitogenome sequence of the Cape honey bee, Apis mellifera capensis, from South Africa. The circle genome is 16,470 bp in length, with the base composition of 43.2% A, 9.6% C, 5.6% G, and 41.5% T. The assembled mitogenome has 13 protein-coding genes (PCGs), 22 transfer RNAs, two ribosomal RNA genes, and one control region. All protein-coding genes are initiated by ATT, ATC, ATG or ATA codons and are terminated by the typical stop codon TAA. The heavy strand encodes four protein-coding genes, eight tRNAs, and two rRNAs. The light strand encodes nine protein-coding genes and 14 tRNAs. The complete mitogenome sequence of A.m. capensis is identical to the gene arrangement found in other A. mellifera mitogenomes and it provides essential and important DNA molecular data for further phylogenetic and evolutionary analysis of members of the genus Apis.