scholarly journals High Sequence Variations in Mitochondrial DNA Control Region among Worldwide Populations of Flathead MulletMugil cephalus

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Brian Wade Jamandre ◽  
Jean-Dominique Durand ◽  
Wann-Nian Tzeng
Keyword(s):  
Mitochondrial Dna ◽  
Control Region ◽  
Tandem Repeats ◽  
Evolutionary Rate ◽  
Variable Number ◽  
Rapid Radiation ◽  
Mitochondrial Dna Control Region ◽  
Good Marker ◽  
Sequence Variations ◽  
Complete Mtdna

The sequence and structure of the complete mtDNA control region (CR) ofM. cephalusfrom African, Pacific, and Atlantic populations are presented in this study to assess its usefulness in phylogeographic studies of this species. The mtDNA CR sequence variations amongM. cephaluspopulations largely exceeded intraspecific polymorphisms that are generally observed in other vertebrates. The length of CR sequence varied amongM. cephaluspopulations due to the presence of indels and variable number of tandem repeats at the3′hypervariable domain. The high evolutionary rate of the CR in this species probably originated from these mutations. However, no excessive homoplasic mutations were noticed. Finally, the star shaped tree inferred from the CR polymorphism stresses a rapid radiation worldwide, in this species. The CR still appears as a good marker for phylogeographic investigations and additional worldwide samples are warranted to further investigate the genetic structure and evolution inM. cephalus.

Tandem repeats and length variation in the mitochondrial DNA control region of Epirrita autumnata (Lepidoptera: Geometridae)

Genome ◽  
2002 ◽  
Vol 45 (5) ◽  
pp. 855-861 ◽  
Author(s):  
N Snäll ◽  
K Huoponen ◽  
M -L Savontaus ◽  
K Ruohomäki
Keyword(s):  
Mitochondrial Dna ◽  
Control Region ◽  
Tandem Repeats ◽  
Repetitive Sequences ◽  
Distinct Type ◽  
Variable Number ◽  
Tandem Array ◽  
Epirrita Autumnata ◽  
Length Variation ◽  
Mitochondrial Dna Control Region

The organization of the mitochondrial DNA (mtDNA) control region (CR) of the autumnal moth, Epirrita autumnata, is described. The E. autumnata CR presents a distinct type of lepidopteran CR with domains of non-repetitive and repetitive sequences. The CRs show considerable length variation owing to a variable number of short ~29-bp sequence blocks that are repeated between 6 and 14 times in tandem. The organization of such a tandem array is unique among the insect CRs examined so far. Furthermore, the E. autumnata CR, which may reach 1075 bp in length, is considerably longer than previously reported lepidopteran CRs, which reach 311–499 bp in length. Like other lepidopteran CRs, the E. autumnata CR contains two long homopolymer runs that may be involved in mtDNA replication and (or) transcription.Key words: Lepidoptera, Epirrita autumnata, mitochondrial DNA, control region, tandem array.

Identification of Lanius species and subspecies using tandem repeats in the mitochondrial DNA control region

Ibis ◽  
2003 ◽  
Vol 146 (2) ◽  
pp. 227-230 ◽  
Author(s):  
M. Angeles Hernández ◽  
Francisco Campos ◽  
Francisco Gutiérrez-Corchero ◽  
Ana Amezcua
Keyword(s):  
Mitochondrial Dna ◽  
Control Region ◽  
Tandem Repeats ◽  
Mitochondrial Dna Control Region

Variable number tandem repeats in the mitochondrial DNA Control region of the Chinese alligator, Alligator sinensis

2006 ◽  
Vol 27 (1) ◽  
pp. 93-101 ◽  
Author(s):  
Shengguo Fang ◽  
Qianghua Xu
Keyword(s):  
Mitochondrial Dna ◽  
Control Region ◽  
Tandem Repeats ◽  
Repetitive Sequences ◽  
Variable Number ◽  
Alligator Mississippiensis ◽  
Chinese Alligator ◽  
Evolutionary Features ◽  
Alligator Sinensis ◽  
Variable Number Tandem Repeats

AbstractVariable number tandem repeats (VNTRs) are present in the control region of mitochondrial DNA (mtDNA) of the alligatorid species; however, the evolutionary dynamics of the repetitive sequences and the significance of the VNTRs in the context of genetic monitoring of these species are not well explored. The Chinese alligator, Alligator sinensis is critically endangered and is now largely in captive breeding. Previous studies in mitochondrial genes revealed little genetic diversity existing within the populations. We reported here the structural variation and evolutionary features of mtVNTRs in the Changxing population of the species. The mtVNTRs contained 676∼785 base pairs, made up by 5 distinct motifs repeated 31∼36 times in 32 individuals examined. The motifs were 21∼22 nts in length, with high sequence similarity between each other and with those of the American alligator (Alligator mississippiensis), indicating origination of the mtVNTRs from a single ancestral duplication unit in both species. The 5′ and 3′ portions of the repetitive sequences in the Chinese alligator were very much conserved among the individuals, while those in the middle showed a higher degree of sequence variation. The frequency of each motif appearing in the mtVNTRs showed positive correlation to the binding energy of the potential secondary structure the motif could adopt. 17 VNTR types, of which, 6 from the second generation and 12 from the third generation were identified from the samples. Analysis of the multiple VNTR types showed a high level of stochastic mutation within each generation. The suitability of the mtVNTRs as a marker to monitor the genetic differentiation of the Chinese alligator was also discussed.

Sequence variations in the mitochondrial DNA control region and their implications for the phylogeny of the Cypriniformes

2002 ◽  
Vol 80 (3) ◽  
pp. 569-581 ◽  
Author(s):  
Huanzhang Liu ◽  
Chyng-Shyan Tzeng ◽  
Hui-Yu Teng
Keyword(s):  
Phylogenetic Analysis ◽  
Mitochondrial Dna ◽  
Control Region ◽  
Monophyletic Group ◽  
Mitochondrial Dna Control Region ◽  
Central Domain ◽  
Conserved Sequence ◽  
Sequence Block ◽  
Sequence Variations

The mitochondrial DNA control region of six cobitids and two catostomids was sequenced and compared with sequences of other cypriniforms to study their sequence variations. The extended termination associated sequence (ETAS) domain, central domain, and conserved sequence block (CSB) domain were partitioned and the ETAS sequence, CSB-D, CSB-E, ECSB-F, CSB1, CSB2, and CSB3 were identified. It is suggested that the "hairpin" TACAT-ATGTA is the key sequence of ETAS and GACATA is the symbol of CSB1. Phylogenetic analysis based on the CSB domain showed that all cyprinids evolved as one monophyletic group, while the non-cyprinid Cypriniformes could be another monophyly that is in accordance with the hypothesis proposed by Siebert. Further analysis of the phylogeny of the Cobitoidei was also conducted and it is tentatively suggested that their relationships are Catostomidae + (Gyrinocheilidae + (Botiinae + (Homalopteridae + (Cobitinae + Nemacheilinae)))).

Nonneutral evolution of tandem repeats in the mitochondrial DNA control region of lagomorphs

1997 ◽  
Vol 14 (8) ◽  
pp. 779-789 ◽  
Author(s):  
D. Casane ◽  
N. Dennebouy ◽  
H. de Rochambeau ◽  
J. C. Mounolou ◽  
M. Monnerot
Keyword(s):  
Mitochondrial Dna ◽  
Control Region ◽  
Tandem Repeats ◽  
Mitochondrial Dna Control Region
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