Mitochondrial DNA based diversity studies reveal distinct and sub-structured populations of pearlspot, Etroplus suratensis (Bloch, 1790) in Indian waters

Abstract When selection increases the frequency of a beneficial gene substitution it can also increase the frequencies of linked neutral alleles through a process called genetic hitchhiking. A model built to investigate reduced genetic diversity in Pleistocene hominins shows that genetic hitchhiking can have a strong effect on neutral diversity in the presence of culturally mediated migration. Under conditions in which genetic and cultural variants are transmitted symmetrically, neutral genes may also hitchhike to higher frequencies on the coattails of adaptive cultural traits through a process called cultural hitchhiking. Cultural hitchhiking has been proposed to explain why some species of matrilineal whales display relatively low levels of mitochondrial DNA diversity, and it may be applicable to humans as well. This paper provides a critical review of recent models of both types of hitchhiking in socially structured populations. The models’ assumptions and predictions are compared and discussed in the hope that studies of reduced genetic diversity in humans might improve our understanding of reduced genetic diversity in other species, and vice versa [Current Zoology 58 (1): 287–297, 2012].

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Mitochondrial DNA variation in spiny lobster Palinurus delagoae suggests genetically structured populations in the southwestern Indian Ocean

Marine Ecology Progress Series ◽

10.3354/meps319191 ◽

2006 ◽

Vol 319 ◽

pp. 191-198 ◽

Cited By ~ 52

Author(s):

K Gopal ◽

KA Tolley ◽

JC Groeneveld ◽

CA Matthee

Keyword(s):

Mitochondrial Dna ◽

Indian Ocean ◽

Spiny Lobster ◽

Structured Populations ◽

Dna Variation ◽

Southwestern Indian Ocean

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Mitochondrial DNA analysis reveals three stocks of yellowfin tuna Thunnus albacares (Bonnaterre, 1788) in Indian waters

Conservation Genetics ◽

10.1007/s10592-013-0445-3 ◽

2013 ◽

Vol 14 (1) ◽

pp. 205-213 ◽

Cited By ~ 26

Author(s):

Swaraj Priyaranjan Kunal ◽

Girish Kumar ◽

Maria Rosalia Menezes ◽

Ram Murti Meena

Keyword(s):

Mitochondrial Dna ◽

Dna Analysis ◽

Yellowfin Tuna ◽

Thunnus Albacares ◽

Mitochondrial Dna Analysis ◽

Indian Waters

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Weak genetic differentiation in cobia, Rachycentron canadum from Indian waters as inferred from mitochondrial DNA ATPase 6 and 8 genes

Mitochondrial DNA Part A ◽

10.3109/19401736.2015.1053083 ◽

2015 ◽

Vol 27 (4) ◽

pp. 2819-2821 ◽

Cited By ~ 3

Author(s):

Linu Joy ◽

C. Mohitha ◽

P. R. Divya ◽

A. Gopalakrishnan ◽

V. S. Basheer ◽

...

Keyword(s):

Mitochondrial Dna ◽

Genetic Differentiation ◽

Rachycentron Canadum ◽

Indian Waters ◽

Atpase 6

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The population structure and genetic divergence of Labeo gonius (Hamilton, 1822) analyzed through mitochondrial DNA cytochrome b gene for conservation in Indian waters

Mitochondrial DNA Part A ◽

10.1080/24701394.2017.1320992 ◽

2017 ◽

Vol 29 (4) ◽

pp. 543-551 ◽

Cited By ~ 2

Author(s):

Bijay Kumar Behera ◽

Vishwamitra Singh Baisvar ◽

Ajaya Kumar Rout ◽

Sudip Pakrashi ◽

Kavita Kumari ◽

...

Keyword(s):

Mitochondrial Dna ◽

Population Structure ◽

Cytochrome B ◽

Genetic Divergence ◽

Cytochrome B Gene ◽

Indian Waters

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Evaluation of the dark field method for large association of spread DNA

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100081814 ◽

1978 ◽

Vol 36 (2) ◽

pp. 190-191

Author(s):

Douglas C. Barker

Keyword(s):

Electron Microscopy ◽

Molecular Weight ◽

Mitochondrial Dna ◽

Extraction Method ◽

Field Method ◽

Dark Field ◽

Kinetoplast Dna ◽

Field Electron ◽

Field Electron Microscopy ◽

Dark Field Electron

A number of satisfactory methods are available for the electron microscopy of nicleic acids. These methods concentrated on fragments of nuclear, viral and mitochondrial DNA less than 50 megadaltons, on denaturation and heteroduplex mapping (Davies et al 1971) or on the interaction between proteins and DNA (Brack and Delain 1975). Less attention has been paid to the experimental criteria necessary for spreading and visualisation by dark field electron microscopy of large intact issociations of DNA. This communication will report on those criteria in relation to the ultrastructure of the (approx. 1 x 10-14g) DNA component of the kinetoplast from Trypanosomes. An extraction method has been developed to eliminate native endonucleases and nuclear contamination and to isolate the kinetoplast DNA (KDNA) as a compact network of high molecular weight. In collaboration with Dr. Ch. Brack (Basel [nstitute of Immunology), we studied the conditions necessary to prepare this KDNA Tor dark field electron microscopy using the microdrop spreading technique.

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Properties of Isolated Mitochondria of Agaricus Bisporus: Their Relationship to Dormancy and the Germination of Spores

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100072733 ◽

1973 ◽

Vol 31 ◽

pp. 458-459

Author(s):

K. S. McCarty ◽

R. F. Weave ◽

L. Kemper ◽

F. S. Vogel

Keyword(s):

Mitochondrial Dna ◽

Ethidium Bromide ◽

Microscopic Examination ◽

Agaricus Bisporus ◽

Osmotic Shock ◽

Electron Microscopic Examination ◽

Electron Microscopic ◽

Isolated Mitochondria ◽

Dna Strands ◽

Cytoplasmic Ribosomes

During the prodromal stages of sporulation in the Basidiomycete, Agaricus bisporus, mitochondria accumulate in the basidial cells, zygotes, in the gill tissues prior to entry of these mitochondria, together with two haploid nuclei and cytoplasmic ribosomes, into the exospores. The mitochondria contain prominent loci of DNA [Fig. 1]. A modified Kleinschmidt spread technique1 has been used to evaluate the DNA strands from purified whole mitochondria released by osmotic shock, mitochondrial DNA purified on CsCl gradients [density = 1.698 gms/cc], and DNA purified on ethidium bromide CsCl gradients. The DNA appeared as linear strands up to 25 u in length and circular forms 2.2-5.2 u in circumference. In specimens prepared by osmotic shock, many strands of DNA are apparently attached to membrane fragments [Fig. 2]. When mitochondria were ruptured in hypotonic sucrose and then fixed in glutaraldehyde, the ribosomes were released for electron microscopic examination.

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