scholarly journals Mitochondrial DNA Variations in Colombian Creole Sheep Confirm an Iberian Origin and Shed Light on the Dynamics of Introduction Events of African Genotypes

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1594
Author(s):  
Herman Alberto Revelo ◽  
Diana López-Alvarez ◽  
Vincenzo Landi ◽  
Lauden Rizzo ◽  
Luz Angela Alvarez
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Relationships ◽  
Genetic Lineage ◽  
Global Level ◽  
Hair Sheep ◽  
Global Comparison ◽  
Genetic Origins ◽  
Dna Variations ◽  
Shed Light ◽  
Subsequent Introduction

The genetic origins and diversity of Creole sheep from five regions of Colombia were investigated based on mitochondrial DNA (mtDNA) variations across 89 sequences from five breeds: one wool Creole sheep (CL) and four hair Creole sheep, including Ethiopian (OPCE), Sudan (OPCS), Pelibuey (OPCP) and Wayúu (OPCW). A global comparison was done using 62 haplotypes from Iberian, African, Indian, Caribbean, Mexican, Caucasian and European sheep based on sequences retrieved from GenBank. This study aimed to identify the maternal origin of Colombian Creole sheep and their genetic relationships at a global level. The results showed 31 different haplotypes from Colombian Creole sheep, which can be assigned to maternal lineage B, the most common lineage found in European sheep breeds and the only one found in several Iberian breed (e.g., Churra, Spanish Merino) that most likely participated in the Creole formation. Additional analyses showed that wool and hair sheep retained a broad genetic identity despite being geographically separated. The global-level phylogenetic analysis revealed that Colombian Creole sheep belong to a distinct and defined genetic lineage that is likely the result of a founder effect with ecotypes of Iberian descent and the subsequent introduction of foreign breeds. This is consistent with historical reports on the presence of sheep in South America and, particularly, Colombia.

A study of the genetic relationships within and among wolf packs using DNA fingerprinting and mitochondrial DNA

1992 ◽  
Vol 30 (2) ◽  
Author(s):  
Niles Lehman ◽  
Peter Clarkson ◽  
L.David Mech ◽  
ThomasJ. Meier ◽  
RobertK. Wayne
Keyword(s):  
Mitochondrial Dna ◽  
Dna Fingerprinting ◽  
Genetic Relationships

scholarly journals Mitochondrial DNA Variation in Peruvian Honey Bee (Apis mellifera L.) Populations Using the tRNAleu-cox2 Intergenic Region

Insects ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 641
Author(s):  
Julio Chávez-Galarza ◽  
Ruth López-Montañez ◽  
Alejandra Jiménez ◽  
Rubén Ferro-Mauricio ◽  
Juan Oré ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Honey Bee ◽  
Intergenic Region ◽  
Current Status ◽  
Dna Variation ◽  
Africanized Honey Bee ◽  
Dna Variations ◽  
The 19Th Century ◽  
Bee Colonies

Mitochondrial DNA variations of Peruvian honey bee populations were surveyed by using the tRNAleu-cox2 intergenic region. Only two studies have characterized these populations, indicating the presence of Africanized honey bee colonies in different regions of Peru and varied levels of Africanization, but the current status of its genetic diversity is unknown. A total of 512 honey bee colonies were sampled from three regions to characterize them. Our results revealed the presence of European and African haplotypes: the African haplotypes identified belong to sub-lineage AI (13) and sub-lineage AIII (03), and the European haplotypes to lineages C (06) and M (02). Of 24 haplotypes identified, 15 new sequences are reported here (11 sub-lineage AI, 2 sub-lineage AIII, and 2 lineage M). Peruvian honey bee populations presented a higher proportion from African than European haplotypes. High proportions of African haplotype were reported for Piura and Junín, unlike Lima, which showed more European haplotypes from lineage C. Few colonies belonging to lineage M would represent accidental purchase or traces of the introduction into Peru in the 19th century.

Mitochondrial and nuclear DNA variation, genotype fingerprinting and genetic relationships in lentil (Lens culinaris Medik.)

1997 ◽  
Vol 77 (4) ◽  
pp. 515-521 ◽  
Author(s):  
Om P. Rajora ◽  
John D. Mahon
Keyword(s):  
Mitochondrial Dna ◽  
Restriction Fragment ◽  
Lens Culinaris ◽  
Nuclear Dna ◽  
Genetic Relationships ◽  
Restriction Enzymes ◽  
Dna Variation ◽  
Apocytochrome B ◽  
Nuclear Dna Variation ◽  
Mean Similarity

Mitochondrial DNA (mtDNA) and nuclear DNA (nuDNA) variations were examined in six cultivars of Lens culinaris ssp. culinaris and two (mtDNA) or one (nuDNA) accession(s) of L. culinaris ssp. orientalis. Total leaf DNA was digested with up to 15 restriction endonucleases, separated by agarose gel electrophoresis and trasferred to nylon membranes. To examine mtDNA variation, blots were probed with mtDNA coding for cytochrome c oxidase I (coxI) and ATPase 6 (atp6) of both wheat and maize as well as apocytochrome b (cob) and Orf25 (orf25) of wheat. Sixteen combinations of mtDNA probes and restriction enzymes revealed 34 fragments that discriminated between at least two lentil accessions. For nuDNA analysis, probes from cDNA and genomic DNA clones of lentil were used to probe the same blots, and identified 46 diagnostic fragments from 19 probe/enzyme combinations. Each lentil accession could be unequivocably distinguished from all others on the basis of both mitochondrial and nuclear DNA fragment patterns. The mitochondrial restriction fragment similarities ranged from 0.944 to 0.989, with a mean of 0.970 but nuclear restriction fragment similarities varied from 0.582 to 0.987, with a mean of 0.743. The apparent genetic relationships among accessions differed according to the source of DNA examined, although the commercial varieties Laird, Brewer and Redchief showed similarly high levels of mean similarity with both nuclear (0.982) and mitochondrial DNA (0.983). Key words: Lens culinaris Medik., genetic variation, mitochondrial, nuclear, DNA, lentil

scholarly journals Comparative Genetic Analysis of Magnaporthe oryzae Isolates Causing Gray Leaf Spot of Perennial Ryegrass Turf in the United States and Japan

Plant Disease ◽  
2007 ◽  
Vol 91 (5) ◽  
pp. 517-524 ◽  
Author(s):  
Y. Tosa ◽  
W. Uddin ◽  
G. Viji ◽  
S. Kang ◽  
S. Mayama
Keyword(s):  
United States ◽  
Perennial Ryegrass ◽  
Magnaporthe Oryzae ◽  
Leaf Spot ◽  
Genetic Relationships ◽  
The United States ◽  
Gray Leaf Spot ◽  
Genetic Lineage ◽  
Type I ◽  
Type Ii

Gray leaf spot caused by Magnaporthe oryzae is a serious disease of perennial ryegrass (Lolium perenne) turf in golf course fairways in the United States and Japan. Genetic relationships among M. oryzae isolates from perennial ryegrass (prg) isolates within and between the two countries were examined using the repetitive DNA elements MGR586, Pot2, and MAGGY as DNA fingerprinting probes. In all, 82 isolates of M. oryzae, including 57 prg isolates from the United States collected from 1995 to 2001, 1 annual ryegrass (Lolium multiflorum) isolate from the United States collected in 1972, and 24 prg isolates from Japan collected from 1996 to 1999 were analyzed in this study. Hybridization with the MGR586 probe resulted in approximately 30 DNA fragments in 75 isolates (designated major MGR586 group) and less than 15 fragments in the remaining 7 isolates (designated minor MGR586 group). Both groups were represented among the 24 isolates from Japan. All isolates from the United States, with the exception of one isolate from Maryland, belonged to the major MGR586 group. Some isolates from Japan exhibited MGR586 fingerprints that were identical to several isolates collected in Pennsylvania. Similarly, fingerprinting analysis with the Pot2 probe also indicated the presence of two distinct groups: isolates in the major MGR586 group showed fingerprinting profiles comprising 20 to 25 bands, whereas the isolates in the minor MGR586 group had less than 10 fragments. When MAGGY was used as a probe, two distinct fingerprint types, one exhibiting more than 30 hybridizing bands (type I) and the other with only 2 to 4 bands (type II), were identified. Although isolates of both types were present in the major MGR586 group, only the type II isolates were identified in the minor MGR586 group. The parsimony tree obtained from combined MGR586 and Pot2 data showed that 71 of the 82 isolates belonged to a single lineage, 5 isolates formed four different lineages, and the remaining 6 (from Japan) formed a separate lineage. This study indicates that the predominant groups of M. oryzae associated with the recent outbreaks of gray leaf spot in Japan and the United States belong to the same genetic lineage.

scholarly journals Systematic Association Studies of Mitochondrial DNA Variations in Schizophrenia: Focus on the ND5 Gene

2007 ◽  
Vol 34 (3) ◽  
pp. 458-465 ◽  
Author(s):  
Mikhil N. Bamne ◽  
Michael E. Talkowski ◽  
Carlos T. Moraes ◽  
Stephen B. Manuck ◽  
Robert E. Ferrell ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Association Studies ◽  
Nd5 Gene ◽  
Dna Variations

Internationalization of Higher Education Institutions in North Cyprus

2019 ◽  
pp. 98-125
Author(s):  
Mehmet Altınay ◽  
Belal Shneikat
Keyword(s):  
Higher Education ◽  
International Association ◽  
Higher Education Institutions ◽  
Internationalization Of Higher Education ◽  
Global Level ◽  
Competition And Cooperation ◽  
North Cyprus ◽  
The World ◽  
Shed Light

Internationalization has become one of the hotly debated issues in higher education institutions due its role in competitive advantage. Countries around the world encourage their universities to engage in competition and cooperation on the local and global level, and this can't be achieved without internationalization. This chapter is proposed to shed light on a unique case study: internationalization of higher education in North Cyprus, which is a politically unrecognized country. To achieve the aim of this chapter, a survey from International Association of Universities (IAU) was adapted to evaluate the internationalization in the four largest and oldest universities in North Cyprus.

scholarly journals Mitochondrial DNA variations in tongue squamous cell carcinoma

2018 ◽  
Author(s):  
Hong-Ying Shu ◽  
Hong-Chao Li ◽  
Wan-Qin Xie ◽  
Bin Ni ◽  
Hai-Yan Zhou
Keyword(s):  
Squamous Cell Carcinoma ◽  
Mitochondrial Dna ◽  
Cell Carcinoma ◽  
Squamous Cell ◽  
Tongue Squamous Cell Carcinoma ◽  
Dna Variations

scholarly journals Ancient mitogenomes show plateau populations from last 5200 years partially contributed to present-day Tibetans

2020 ◽  
Vol 287 (1923) ◽  
pp. 20192968 ◽  
Author(s):  
Manyu Ding ◽  
Tianyi Wang ◽  
Albert Min-Shan Ko ◽  
Honghai Chen ◽  
Hui Wang ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Deep Learning ◽  
Tibetan Plateau ◽  
High Altitude ◽  
Simulation Models ◽  
The Tibetan Plateau ◽  
Limited Evidence ◽  
Complete Continuity ◽  
Genetic Origins ◽  
Low Altitude

The clarification of the genetic origins of present-day Tibetans requires an understanding of their past relationships with the ancient populations of the Tibetan Plateau. Here we successfully sequenced 67 complete mitochondrial DNA genomes of 5200 to 300-year-old humans from the plateau. Apart from identifying two ancient plateau lineages (haplogroups D4j1b and M9a1a1c1b1a) that suggest some ancestors of Tibetans came from low-altitude areas 4750 to 2775 years ago and that some were involved in an expansion of people moving between high-altitude areas 2125 to 1100 years ago, we found limited evidence of recent matrilineal continuity on the plateau. Furthermore, deep learning of the ancient data incorporated into simulation models with an accuracy of 97% supports that present-day Tibetan matrilineal ancestry received partial contribution rather than complete continuity from the plateau populations of the last 5200 years.

scholarly journals Genetic relationships of Amaurobioides (Anyphaenidae) spiders from the southeastern coast of New Zealand

Zootaxa ◽  
2007 ◽  
Vol 1425 (1) ◽  
pp. 1-10 ◽  
Author(s):  
BRENT D. OPELL ◽  
ANDREA M. BERGER ◽  
SOPHIA M. BOUS ◽  
MICHAEL L. MANNING
Keyword(s):  
Mitochondrial Dna ◽  
Haplotype Analysis ◽  
Genetic Relationships ◽  
Genetic Distances ◽  
Restricted Gene Flow ◽  
Long Distance Dispersal ◽  
Long Distance ◽  
Morphological Species ◽  
Southern Species ◽  
Northeastern Coast

Members of the genus Amaurobioides construct silk retreats in rock crevices of the marine spray zone, a harsh and unusual habitat for spiders. This study expands the distribution records of three morphological species of Amaurobioides found on the eastern and southern coasts of New Zealand’s South Island and uses mitochondrial DNA to examine their relationships and characterize their dispersal capabilities. Both 16S and ND1 sequences distinguish A. pletus found on the northeastern coast from a complex of two southern species comprised of A. maritimus from the mainland and A. picunus from Stewart Island. Neither 16S DNA nor ND1 protein separates these southern species. However, ND1 parsimony and likelihood analyses place 10 of 11 Stewart Island specimens in a clade of low support that nests deeply within A. maritimus. A nested haplotype analysis characterizes A. maritimus and A. picunus populations as having restricted gene flow/dispersal but with some long distance dispersal. Genetic distances between A. pletus and the A. maritimus-A. picunus complex indicate a Pliocene origin, whereas distances between A. maritimus and A. picunus suggest a Pleistocene divergence.

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