Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Study on a Brazilian isolate. II. Opportunity for selection.

J C Magalhães1, B Arce-Gomez

  • 1Departamento de Genética, Universidade Federal do Paraná, Curitiba, PR, Brazil.

Human Heredity
|January 1, 1987
PubMed
Summary

Selection opportunity in an isolated Brazilian population was low, with prereproductive mortality contributing more than fertility. This indicates reduced evolutionary pressure in this demographic group.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Plasma cytokine response, lipid peroxidation and NF-kB activation in skeletal muscle following maximum progressive swimming.

Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas·2011
Same author

Suppes predicate for genetics and natural selection.

Journal of theoretical biology·2001
Same author

HLA-A29 and genetic susceptibility to chromoblastomycosis.

Journal of medical and veterinary mycology : bi-monthly publication of the International Society for Human and Animal Mycology·1989
Same author

The HLA polymorphism in five Brazilian populations.

Annals of human biology·1988
Same author

Increased frequency of HLA-B40 in patients with paracoccidioidomycosis.

Journal of medical and veterinary mycology : bi-monthly publication of the International Society for Human and Animal Mycology·1988
Same author

Association of viral hepatitis A with HLA-A9.

Human immunology·1987

Area of Science:

  • Human evolutionary biology
  • Population genetics
  • Anthropology

Background:

  • Understanding evolutionary forces requires quantifying selection pressures.
  • Isolated populations offer unique insights into genetic adaptation.
  • Brazil harbors diverse, understudied human populations.

Purpose of the Study:

  • To calculate the index of selection opportunity in a small, isolated Brazilian population.
  • To compare prereproductive mortality and fertility contributions to overall selection.
  • To assess the potential for natural selection in this demographic.

Main Methods:

  • Calculated the index of selection opportunity using prereproductive mortality (Im) and fertility (If) data.
  • Analyzed demographic data from a specific Brazilian population.
  • Compared findings with selection indices from other isolated groups.

Main Results:

  • The total index of selection opportunity was low (0.53) compared to other isolated populations.
  • Prereproductive mortality (Im = 0.28) was a greater contributor to selection than fertility (If = 0.20).
  • Mortality's contribution was 40% higher than fertility's.

Conclusions:

  • The studied Brazilian population exhibits low overall selection opportunity.
  • Prereproductive mortality plays a more significant role in shaping selection than fertility in this group.
  • Findings suggest limited scope for natural selection acting on these traits.

Related Experiment Videos