scholarly journals Genetic variation of the green chafer, Anomala albopilosa (Hope) (Coleoptera: Scarabaeidae), in the Ryukyu Islands of Japan detected by mitochondrial DNA sequences

2008 ◽  
Vol 43 (2) ◽  
pp. 299-306 ◽  
Author(s):  
Masahiko Muraji ◽  
Norio Arakaki ◽  
Suguru Ohno ◽  
Yoshio Hirai
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Variation ◽  
Dna Sequences ◽  
Ryukyu Islands ◽  
The Ryukyu Islands

scholarly journals Evolutionary Relationship between Two Firefly Species,Curtos costipennisandC. okinawanus(Coleoptera, Lampyridae), in the Ryukyu Islands of Japan Revealed by the Mitochondrial and Nuclear DNA Sequences

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Masahiko Muraji ◽  
Norio Arakaki ◽  
Shigeo Tanizaki
Keyword(s):  
Dna Sequences ◽  
Evolutionary History ◽  
Nuclear Dna ◽  
Evolutionary Relationship ◽  
Early Pleistocene ◽  
Ryukyu Islands ◽  
Mtdna Sequences ◽  
Northern Half ◽  
The Ryukyu Islands ◽  
History Of

The phylogenetic relationship, biogeography, and evolutionary history of closely related two firefly species,Curtos costipennisandC. okinawanus, distributed in the Ryukyu Islands of Japan were examined based on nucleotide sequences of mitochondrial (2.2 kb long) and nuclear (1.1-1.2 kb long) DNAs. In these analyses, individuals were divided among three genetically distinct local groups,C. costipennisin the Amami region,C. okinawanusin the Okinawa region, andC. costipennisin the Sakishima region. Their mtDNA sequences suggested that ancestralC. costipennispopulation was first separated between the Central and Southern Ryukyu areas, and the northern half was then subdivided betweenC. costipennisin the Amami andC. okinawanusin the Okinawa. The application of the molecular evolutionary clocks of coleopteran insects indicated that their vicariance occurred 1.0–1.4 million years ago, suggesting the influence of submergence and subdivision of a paleopeninsula extending between the Ryukyu Islands and continental China through Taiwan in the early Pleistocene.

Genetic variation of Tarbinskiellus portentosus (Lichtenstein 1796) (Orthoptera: Gryllidae) in mainland Southeast Asia examined by mitochondrial DNA sequences

2021 ◽  
Author(s):  
Nakorn Pradit ◽  
Weerachai Saijuntha ◽  
Warayutt Pilap ◽  
Warong Suksavate ◽  
Takeshi Agatsuma ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Variation ◽  
Southeast Asia ◽  
Dna Sequences ◽  
Mainland Southeast Asia

scholarly journals The Philippines is a possible source of the Bactrocera dorsalis complex species (Diptera, Tephritidae) occasionally collected in the Ryukyu Islands of Japan; analyses of mitochondrial DNA

2008 ◽  
Vol 43 (4) ◽  
pp. 609-615 ◽  
Author(s):  
Masahiko Muraji ◽  
Shigehito Nakahara ◽  
Tatsuaki Ishida ◽  
Kazushige Minoura ◽  
Isao Miyazaki ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
The Philippines ◽  
Bactrocera Dorsalis ◽  
Ryukyu Islands ◽  
Complex Species ◽  
The Ryukyu Islands

scholarly journals Higher Genetic Diversity of the Common Sea Cucumber Holothuria (Halodeima) atra in Marine Protected Areas of the Central and Southern Ryukyu Islands

2021 ◽  
Vol 2 ◽  
Author(s):  
Kohei Hamamoto ◽  
Taha Soliman ◽  
Angelo Poliseno ◽  
Iria Fernandez-Silva ◽  
James Davis Reimer
Keyword(s):  
Genetic Diversity ◽  
Dna Sequences ◽  
Sea Cucumber ◽  
Haplotype Diversity ◽  
Coastal Development ◽  
Ryukyu Islands ◽  
Anthropogenic Pressure ◽  
Sea Cucumbers ◽  
The Ryukyu Islands ◽  
Okinawa Prefecture

Recently, sea cucumbers (Echinodermata: Holothuroidea) have been over-exploited in many areas of the world, including in the Ryukyu Islands, southern Japan, due to increases in their economic importance. Nevertheless, management and protection of sea cucumbers are insufficient worldwide. The black sea cucumber Holothuria (Halodeima) atra Jaeger, 1833, inhabits a large range across the Indo-West Pacific Ocean and is a widely harvested species. Here we conducted population genetic analyses on H. atra using partial mitochondrial DNA sequences of cytochrome c oxidase subunit I (COI) and 16S ribosomal RNA (16S) to examine 11 different populations around three island groups in the middle Ryukyus; Okinawajima Island, the Kerama Islands, and the Sakishima Islands, all within Okinawa Prefecture. We found 27 haplotypes for COI and 16 haplotypes for 16S. Locations within national and quasi-national parks (Zamami Island, Keramas, and Manza, Okinawajima; managed by the national Ministry of Environment and Okinawa Prefecture, respectively) had the highest number of haplotypes, whereas locations with less management and more anthropogenic pressure had lower numbers The mean of all samples' genetic diversity indices was moderate with regards to both haplotype and nucleotide diversity. According to our results, Zamami Ama was the most genetically diverse location based on both markers used, likely because it is located within Kerama-Shoto National Park with comparatively stricter regulations than most other locations. Based on our COI sequences, three-quarters of the locations with the highest haplotype diversity were found to be distant from Okinawajima Island, indicating that the genetic diversity of H. atra was reduced around Okinawajima Island. Our results possibly reflect negative impacts from anthropogenic pressures such as over-harvesting and coastal development, although future comprehensive research including sequences of nuclear loci is needed to confirm this hypothesis.

Genetic Variation and Invasion Pattern of the Arabian Rhinoceros Beetle,Oryctes agamemnon arabicus(Burmeister) (Coleoptera: Scarabaeidae), in Tunisia, Deduced from Mitochondrial DNA Sequences

2013 ◽  
Vol 21 (2) ◽  
pp. 362-367 ◽  
Author(s):  
Z. Abdallah ◽  
M. Mezghani-Khemakhem ◽  
D. Bouktila ◽  
H. Makni ◽  
M. Makni
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Variation ◽  
Dna Sequences ◽  
Rhinoceros Beetle ◽  
Oryctes Agamemnon ◽  
Invasion Pattern

Genetic variation of a freshwater snail Hydrobioides nassa (Gastropoda: Bithyniidae) in Thailand examined by mitochondrial DNA sequences

Hydrobiologia ◽  
2019 ◽  
Author(s):  
Naruemon Bunchom ◽  
Weerachai Saijuntha ◽  
Warayutt Pilap ◽  
Warong Suksavate ◽  
Kotchaphon Vaisusuk ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Variation ◽  
Dna Sequences ◽  
Freshwater Snail

scholarly journals Mitochondrial genetic variation is enriched in G-quadruplex regions that stall DNA synthesis in vitro

2020 ◽  
Vol 29 (8) ◽  
pp. 1292-1309 ◽  
Author(s):  
Thomas J Butler ◽  
Katrina N Estep ◽  
Joshua A Sommers ◽  
Robert W Maul ◽  
Ann Zenobia Moore ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Variation ◽  
Dna Replication ◽  
Dna Synthesis ◽  
Dna Sequences ◽  
Computational Analysis ◽  
Italian Population ◽  
Dna Structures ◽  
G Quadruplex

Abstract As the powerhouses of the eukaryotic cell, mitochondria must maintain their genomes which encode proteins essential for energy production. Mitochondria are characterized by guanine-rich DNA sequences that spontaneously form unusual three-dimensional structures known as G-quadruplexes (G4). G4 structures can be problematic for the essential processes of DNA replication and transcription because they deter normal progression of the enzymatic-driven processes. In this study, we addressed the hypothesis that mitochondrial G4 is a source of mutagenesis leading to base-pair substitutions. Our computational analysis of 2757 individual genomes from two Italian population cohorts (SardiNIA and InCHIANTI) revealed a statistically significant enrichment of mitochondrial mutations within sequences corresponding to stable G4 DNA structures. Guided by the computational analysis results, we designed biochemical reconstitution experiments and demonstrated that DNA synthesis by two known mitochondrial DNA polymerases (Pol γ, PrimPol) in vitro was strongly blocked by representative stable G4 mitochondrial DNA structures, which could be overcome in a specific manner by the ATP-dependent G4-resolving helicase Pif1. However, error-prone DNA synthesis by PrimPol using the G4 template sequence persisted even in the presence of Pif1. Altogether, our results suggest that genetic variation is enriched in G-quadruplex regions that impede mitochondrial DNA replication.

scholarly journals Geographic Patterns of Genetic Variation in a Broadly Distributed Marine Vertebrate: New Insights into Loggerhead Turtle Stock Structure from Expanded Mitochondrial DNA Sequences

PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e85956 ◽  
Author(s):  
Brian M. Shamblin ◽  
Alan B. Bolten ◽  
F. Alberto Abreu-Grobois ◽  
Karen A. Bjorndal ◽  
Luis Cardona ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Variation ◽  
Dna Sequences ◽  
Loggerhead Turtle ◽  
Stock Structure ◽  
Geographic Patterns
Sign in / Sign up

Export Citation Format

Share Document