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

Nautural selection for within-generation variance in offspring number.

J H Gillespie

    Genetics
    |March 1, 1974
    PubMed
    Summary

    Natural selection influences offspring number variance. Lower variance in offspring number increases genotype fitness, with selection intensity inversely related to population size. This impacts evolutionary dynamics and population genetics theories.

    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

    Facts and Theories About Muscular Activity.

    The Ulster medical journal·2010
    Same author

    Is the population size of a species relevant to its evolution?

    Evolution; international journal of organic evolution·2002
    Same author

    The neutral theory in an infinite population.

    Gene·2001
    Same author

    Genetic drift in an infinite population. The pseudohitchhiking model.

    Genetics·2000
    Same author

    The role of population size in molecular evolution.

    Theoretical population biology·1999
    Same author

    Junk ain't what junk does: neutral alleles in a selected context.

    Gene·1998

    Area of Science:

    • Evolutionary biology
    • Population genetics

    Background:

    • Natural selection traditionally focuses on mean fitness.
    • Within-generation variance in offspring number is a less explored fitness component.

    Purpose of the Study:

    • To investigate natural selection acting on within-generation variance in offspring number.
    • To determine how population size affects selection intensity and fixation probability related to this variance.

    Main Methods:

    • Theoretical modeling of selection on offspring number variance.
    • Analysis of fixation probabilities for genes influencing variance.

    Main Results:

    • Fitness increases as genotype's offspring number variance decreases.
    • Selection intensity on variance is inversely proportional to population size.
    • Fixation probability is independent of population size.

    Conclusions:

    • Natural selection can directly act on offspring number variance.
    • Effective population size has limitations when genetic variation in variance exists.
    • This variance component is crucial for understanding evolutionary processes.

    Related Experiment Videos