Inbreeding
Inbreeding - Related Videos
06:44
Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi
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Cited by 1 •
2018
In this protocol, methods for conducting inbreeding crosses, and for evaluating the success of those crosses, are described for the ant Vollenhovia emeryi. These protocols are important for experiments aimed at understanding the genetic basis of sex determination systems in Hymenoptera.
02:04
Conservation of Small Populations
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2019
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less likely to...
09:23
Maintaining Aedes aegypti Mosquitoes Infected with Wolbachia
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Cited by 46 •
2017
Aedes aegypti mosquitoes infected with Wolbachia are being released into natural populations to suppress the transmission of arboviruses. We describe methods to rear Ae. aegypti with Wolbachia infections in the laboratory for experiments and field release, taking precautions to minimize laboratory adaptation and selection.
15:00
Fundamentals of Breeding and Weaning
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2016
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN Millions of mice and rats are bred for use in biomedical research each year. Worldwide, there are several large commercial breeding facilities that supply mice to research laboratories, but many facilities also choose to breed mice and rats in-house to reduce costs and increase research options. When breeding in the animal facility, researchers are able to manipulate the genetics of the...
FAQs
The key genetic change is increased homozygosity, meaning offspring carry two matching alleles at more loci. Related parents are more likely to share alleles inherited from a common ancestor, so their offspring have a greater chance of receiving the same allele from both sides. This increases genetic similarity within offspring and populations.
Harmful recessive variants may have little visible effect when paired with a different allele. Greater homozygosity makes it more likely that an offspring receives the same harmful variant from both parents, allowing its effects to appear. Inbreeding depression can then involve reduced fertility, survival, or growth, depending on the biological context.
Inbreeding provides a way to examine how inheritance and genetic variation influence organisms, while natural or artificial selection helps investigate how particular traits change. Studying these processes together can show how inherited similarities, variation, and selection relate to outcomes in populations or domesticated organisms.
Conservation programs monitor inbreeding to help preserve population fitness and minimize loss of genetic diversity. The goal is not simply to track relatedness, but to identify conditions that could increase genetic similarity and reduce the population’s biological capacity. This information supports efforts to maintain healthier, more genetically varied populations.
Controlled inbreeding can establish stable laboratory strains with more consistent inherited characteristics. Such strains help researchers investigate inheritance, genetic variation, and biological responses under reproducible genetic conditions. The approach is useful when stability within a strain is more important than maintaining the broad genetic diversity found in a larger population.
In domesticated organisms, controlled inbreeding may be used to enhance desired traits. Its value depends on the biological objective and must be considered alongside possible effects on fitness, because increased homozygosity can expose harmful recessive variants. Biology therefore treats the approach as both a tool for trait development and a subject of genetic evaluation.