Latitudinal differences in sex chromosome inversions, sex linked allozymes, and mitochondrial DNA variation in Drosophila subobscura

Genetica ◽  
1993 ◽  
Vol 92 (1) ◽  
pp. 67-74 ◽  
Author(s):  
J. M. Larruga ◽  
J. Rozas ◽  
M. Hern�ndez ◽  
A. M. Gonz�lez ◽  
V. M. Cabrera
Keyword(s):  
Mitochondrial Dna ◽  
Sex Chromosome ◽  
Drosophila Subobscura ◽  
Dna Variation ◽  
Chromosome Inversions

scholarly journals Chromosomal and mitochondrial DNA variation in four laboratory populations of collared lemmings (Dicrostonyx)

1993 ◽  
Vol 71 (1) ◽  
pp. 42-48 ◽  
Author(s):  
Mark D. Engstrom ◽  
Allan J. Baker ◽  
Judith L. Eger ◽  
Rudy Boonstra ◽  
Ronald J. Brooks
Keyword(s):  
Mitochondrial Dna ◽  
Sex Chromosomes ◽  
Sex Chromosome ◽  
Glacial Refugia ◽  
Chromosome Morphology ◽  
Preliminary Evaluation ◽  
Dna Variation ◽  
Allopatric Divergence ◽  
Laboratory Populations ◽  
Robertsonian Rearrangements

Genetic differentiation among populations and speciation in Dicrostonyx is hypothesized to have resulted from either allopatric divergence in glacial refugia during the Wisconsin or sympatric processes uncorrelated with refugial isolation. We examined chromosomal and mitochondrial DNA variation in four laboratory colonies, representing three species, in a preliminary evaluation of these hypotheses. Chromosomal variation is extensive among populations, diploid numbers ranging from 38 to 50. Autosomal variation appears to be due primarily to Robertsonian rearrangements and additions of supernumerary chromosomes, and is geographically unpatterned. Sex chromosome morphology is geographically structured and correlated with proposed southern and northern refugia. Restriction fragment analysis of mitochondrial DNA revealed two ancient, divergent genotypic assemblages, corresponding to geographic distributions of sex chromosomes. Autosomal variation, and any resulting reproductive isolation, probably is recent and uncorrelated with refugial history, whereas divergence of sex chromosomes and disparate mitochondrial assemblages likely predate the Wisconsin.

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.

scholarly journals Low Mitochondrial DNA Variation in Double-crested Cormorants in Eastern North America

Waterbirds ◽  
2003 ◽  
Vol 26 (2) ◽  
pp. 196 ◽  
Author(s):  
Juliann L. Waits ◽  
Michael L. Avery ◽  
Mark E. Tobin ◽  
Paul L. Leberg
Keyword(s):  
Mitochondrial Dna ◽  
North America ◽  
Eastern North America ◽  
Dna Variation

scholarly journals Deep sequencing reveals the mitochondrial DNA variation landscapes of breast-to-brain metastasis blood samples

2017 ◽  
Vol 29 (5) ◽  
pp. 703-713
Author(s):  
Rhiannon E. McGeehan ◽  
Lewis A. Cockram ◽  
D. Timothy J. Littlewood ◽  
Kathleen Keatley ◽  
Diana M. Eccles ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Brain Metastasis ◽  
Deep Sequencing ◽  
Blood Samples ◽  
Dna Variation

scholarly journals Mitochondrial DNA variation and virologic and immunological HIV outcomes in African Americans

AIDS ◽  
2014 ◽  
Vol 28 (13) ◽  
pp. 1871-1878 ◽  
Author(s):  
Brahim Aissani ◽  
Sadeep Shrestha ◽  
Howard W. Wiener ◽  
Jianming Tang ◽  
Richard A. Kaslow ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
African Americans ◽  
Dna Variation

scholarly journals OC-0085: Mitochondrial DNA variation as a biomarker for the development of radiation-induced lung toxicity

2015 ◽  
Vol 115 ◽  
pp. S43
Author(s):  
A. Voets ◽  
C. Oberije ◽  
G. Nalbantov ◽  
A.P. Stassen ◽  
A.T. Hendrickx ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Lung Toxicity ◽  
Dna Variation ◽  
Radiation Induced

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

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