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Protocol for Assessing the Relative Effects of Environment and Genetics on Antler and Body Growth for a Long-lived Cervid
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Polygyny can increase rather than decrease genetic diversity contributed by males relative to females: evidence from

J Pérez-González1, C Mateos, J Carranza

  • 1Biology and Ethology, University of Extremadura, 10071 Cáceres, Spain.

Molecular Ecology
|March 24, 2009
PubMed
Summary
This summary is machine-generated.

In polygynous red deer, males surprisingly contributed more genetic diversity than females. Polygyny did not decrease genetic diversity and even increased paternal diversity in low-diversity populations.

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Area of Science:

  • Evolutionary biology
  • Population genetics
  • Behavioral ecology

Background:

  • Polygyny is a mating system where males mate with multiple females.
  • It is hypothesized that polygyny reduces genetic variability by limiting male genetic contributions.
  • Empirical data often contradicts this hypothesis, showing less genetic erosion than expected.

Purpose of the Study:

  • To investigate the genetic contribution of males and females to offspring in a polygynous mammal.
  • To determine the relationship between the degree of polygyny and genetic diversity in wild red deer populations.
  • To understand the mechanisms maintaining genetic diversity in polygynous systems.

Main Methods:

  • Utilized microsatellite markers to analyze genetic variability.
  • Studied genetic transmission from parents to offspring over a reproductive season.
  • Compared genetic diversity across red deer populations with varying levels of polygyny.

Main Results:

  • Males contributed greater genetic diversity than females to offspring.
  • No negative correlation was found between polygyny and male genetic diversity.
  • Polygyny was associated with increased paternal lineage diversity in populations with low genetic diversity.

Conclusions:

  • Sexual selection, favoring heterozygotes, may counteract the effects of polygyny on effective population size.
  • This mechanism helps explain the maintenance of genetic diversity in polygynous populations.
  • Findings challenge the traditional view of polygyny solely leading to genetic erosion.